./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/s4lif.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/s4lif.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 b9b6be32708c9c869a7ef906994ed167b62b1be5ed541f61924ceda8b83e642a --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 08:52:59,221 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 08:52:59,224 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 08:52:59,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 08:52:59,267 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 08:52:59,270 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 08:52:59,271 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 08:52:59,273 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 08:52:59,275 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 08:52:59,279 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 08:52:59,280 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 08:52:59,281 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 08:52:59,281 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 08:52:59,283 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 08:52:59,285 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 08:52:59,290 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 08:52:59,291 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 08:52:59,292 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 08:52:59,294 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 08:52:59,299 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 08:52:59,300 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 08:52:59,301 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 08:52:59,302 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 08:52:59,303 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 08:52:59,309 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 08:52:59,309 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 08:52:59,309 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 08:52:59,311 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 08:52:59,311 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 08:52:59,312 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 08:52:59,312 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 08:52:59,313 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 08:52:59,314 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 08:52:59,315 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 08:52:59,316 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 08:52:59,317 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 08:52:59,317 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 08:52:59,317 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 08:52:59,317 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 08:52:59,319 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 08:52:59,320 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 08:52:59,321 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 08:52:59,345 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 08:52:59,346 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 08:52:59,346 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 08:52:59,346 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 08:52:59,347 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 08:52:59,347 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 08:52:59,348 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 08:52:59,348 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 08:52:59,348 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 08:52:59,348 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 08:52:59,349 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 08:52:59,349 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 08:52:59,349 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 08:52:59,350 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 08:52:59,350 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 08:52:59,350 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 08:52:59,350 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 08:52:59,351 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 08:52:59,351 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 08:52:59,351 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 08:52:59,351 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 08:52:59,351 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 08:52:59,352 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 08:52:59,352 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 08:52:59,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:52:59,352 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 08:52:59,352 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 08:52:59,353 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 08:52:59,354 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 08:52:59,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 08:52:59,354 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 08:52:59,354 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 08:52:59,354 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 08:52:59,355 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 08:52:59,355 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b9b6be32708c9c869a7ef906994ed167b62b1be5ed541f61924ceda8b83e642a [2021-12-15 08:52:59,575 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 08:52:59,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 08:52:59,599 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 08:52:59,600 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 08:52:59,601 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 08:52:59,602 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s4lif.c [2021-12-15 08:52:59,676 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/556c9aaaa/3af28d9549454d06a62c2807826676ff/FLAGcf60c9966 [2021-12-15 08:53:00,022 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 08:53:00,022 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s4lif.c [2021-12-15 08:53:00,027 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/556c9aaaa/3af28d9549454d06a62c2807826676ff/FLAGcf60c9966 [2021-12-15 08:53:00,443 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/556c9aaaa/3af28d9549454d06a62c2807826676ff [2021-12-15 08:53:00,445 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 08:53:00,447 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 08:53:00,448 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 08:53:00,449 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 08:53:00,452 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 08:53:00,452 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:53:00" (1/1) ... [2021-12-15 08:53:00,453 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f182968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:53:00, skipping insertion in model container [2021-12-15 08:53:00,453 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:53:00" (1/1) ... [2021-12-15 08:53:00,459 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 08:53:00,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 08:53:00,594 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s4lif.c[588,601] [2021-12-15 08:53:00,614 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:53:00,621 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 08:53:00,637 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s4lif.c[588,601] [2021-12-15 08:53:00,647 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:53:00,661 INFO L208 MainTranslator]: Completed translation [2021-12-15 08:53:00,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:53:00 WrapperNode [2021-12-15 08:53:00,661 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 08:53:00,662 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 08:53:00,662 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 08:53:00,662 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 08:53:00,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:53:00" (1/1) ... [2021-12-15 08:53:00,673 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:53:00" (1/1) ... [2021-12-15 08:53:00,697 INFO L137 Inliner]: procedures = 17, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 81 [2021-12-15 08:53:00,697 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 08:53:00,698 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 08:53:00,698 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 08:53:00,698 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 08:53:00,705 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:53:00" (1/1) ... [2021-12-15 08:53:00,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:53:00" (1/1) ... [2021-12-15 08:53:00,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:53:00" (1/1) ... [2021-12-15 08:53:00,718 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:53:00" (1/1) ... [2021-12-15 08:53:00,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:53:00" (1/1) ... [2021-12-15 08:53:00,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:53:00" (1/1) ... [2021-12-15 08:53:00,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:53:00" (1/1) ... [2021-12-15 08:53:00,734 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 08:53:00,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 08:53:00,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 08:53:00,735 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 08:53:00,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:53:00" (1/1) ... [2021-12-15 08:53:00,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:53:00,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:53:00,764 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 08:53:00,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 08:53:00,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 08:53:00,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 08:53:00,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 08:53:00,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 08:53:00,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 08:53:00,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 08:53:00,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 08:53:00,793 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 08:53:00,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 08:53:00,841 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 08:53:00,842 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 08:53:00,972 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 08:53:00,977 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 08:53:00,977 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-15 08:53:00,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:53:00 BoogieIcfgContainer [2021-12-15 08:53:00,979 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 08:53:00,996 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 08:53:00,996 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 08:53:01,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 08:53:01,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 08:53:00" (1/3) ... [2021-12-15 08:53:01,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40c0dbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:53:01, skipping insertion in model container [2021-12-15 08:53:01,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:53:00" (2/3) ... [2021-12-15 08:53:01,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40c0dbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:53:01, skipping insertion in model container [2021-12-15 08:53:01,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:53:00" (3/3) ... [2021-12-15 08:53:01,009 INFO L111 eAbstractionObserver]: Analyzing ICFG s4lif.c [2021-12-15 08:53:01,013 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 08:53:01,013 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 08:53:01,052 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 08:53:01,058 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 08:53:01,058 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 08:53:01,070 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:01,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 08:53:01,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:53:01,075 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:53:01,076 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:53:01,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:53:01,083 INFO L85 PathProgramCache]: Analyzing trace with hash -845640729, now seen corresponding path program 1 times [2021-12-15 08:53:01,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:53:01,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444856307] [2021-12-15 08:53:01,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:53:01,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:53:01,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:53:01,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:53:01,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:53:01,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444856307] [2021-12-15 08:53:01,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444856307] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:53:01,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:53:01,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 08:53:01,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571166138] [2021-12-15 08:53:01,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:53:01,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 08:53:01,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:53:01,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 08:53:01,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 08:53:01,279 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:01,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:53:01,294 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2021-12-15 08:53:01,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 08:53:01,297 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-15 08:53:01,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:53:01,308 INFO L225 Difference]: With dead ends: 40 [2021-12-15 08:53:01,309 INFO L226 Difference]: Without dead ends: 18 [2021-12-15 08:53:01,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 08:53:01,315 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:53:01,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:53:01,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-15 08:53:01,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-15 08:53:01,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:01,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-12-15 08:53:01,348 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2021-12-15 08:53:01,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:53:01,349 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-12-15 08:53:01,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:01,350 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-12-15 08:53:01,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 08:53:01,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:53:01,351 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:53:01,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 08:53:01,352 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:53:01,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:53:01,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1238667739, now seen corresponding path program 1 times [2021-12-15 08:53:01,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:53:01,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125658175] [2021-12-15 08:53:01,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:53:01,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:53:01,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:53:01,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:53:01,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:53:01,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125658175] [2021-12-15 08:53:01,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125658175] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:53:01,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:53:01,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:53:01,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943205748] [2021-12-15 08:53:01,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:53:01,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:53:01,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:53:01,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:53:01,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:53:01,480 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:01,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:53:01,544 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2021-12-15 08:53:01,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:53:01,544 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-15 08:53:01,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:53:01,546 INFO L225 Difference]: With dead ends: 36 [2021-12-15 08:53:01,546 INFO L226 Difference]: Without dead ends: 25 [2021-12-15 08:53:01,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:53:01,551 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:53:01,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 11 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:53:01,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-15 08:53:01,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2021-12-15 08:53:01,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:01,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-12-15 08:53:01,561 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2021-12-15 08:53:01,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:53:01,563 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-12-15 08:53:01,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:01,566 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-12-15 08:53:01,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-15 08:53:01,567 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:53:01,567 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:53:01,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 08:53:01,568 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:53:01,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:53:01,568 INFO L85 PathProgramCache]: Analyzing trace with hash 2001188913, now seen corresponding path program 1 times [2021-12-15 08:53:01,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:53:01,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24165366] [2021-12-15 08:53:01,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:53:01,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:53:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:53:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:53:02,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:53:02,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24165366] [2021-12-15 08:53:02,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24165366] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:53:02,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025446196] [2021-12-15 08:53:02,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:53:02,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:53:02,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:53:02,168 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:53:02,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 08:53:02,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:53:02,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-15 08:53:02,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:53:02,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 08:53:02,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:02,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 08:53:02,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:02,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 23 [2021-12-15 08:53:02,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:02,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-12-15 08:53:02,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:02,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 27 [2021-12-15 08:53:02,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:53:02,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:53:03,174 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 08:53:03,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 44 [2021-12-15 08:53:03,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 08:53:03,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 42 [2021-12-15 08:53:03,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:53:03,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2021-12-15 08:53:03,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-12-15 08:53:03,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:53:03,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025446196] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:53:03,308 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:53:03,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 30 [2021-12-15 08:53:03,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194568780] [2021-12-15 08:53:03,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:53:03,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-15 08:53:03,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:53:03,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-15 08:53:03,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2021-12-15 08:53:03,311 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:03,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:53:03,591 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-12-15 08:53:03,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-15 08:53:03,592 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-15 08:53:03,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:53:03,594 INFO L225 Difference]: With dead ends: 44 [2021-12-15 08:53:03,594 INFO L226 Difference]: Without dead ends: 39 [2021-12-15 08:53:03,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=240, Invalid=950, Unknown=0, NotChecked=0, Total=1190 [2021-12-15 08:53:03,595 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 15 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:53:03,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 55 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 97 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2021-12-15 08:53:03,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-15 08:53:03,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2021-12-15 08:53:03,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:03,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2021-12-15 08:53:03,601 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 20 [2021-12-15 08:53:03,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:53:03,601 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2021-12-15 08:53:03,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:03,602 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2021-12-15 08:53:03,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-15 08:53:03,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:53:03,603 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:53:03,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 08:53:03,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:53:03,827 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:53:03,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:53:03,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1608161903, now seen corresponding path program 1 times [2021-12-15 08:53:03,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:53:03,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666063295] [2021-12-15 08:53:03,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:53:03,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:53:03,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:53:03,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 08:53:03,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:53:03,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666063295] [2021-12-15 08:53:03,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666063295] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:53:03,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483042202] [2021-12-15 08:53:03,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:53:03,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:53:03,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:53:03,944 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:53:03,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 08:53:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:53:03,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-15 08:53:03,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:53:04,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-12-15 08:53:04,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 08:53:04,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 08:53:04,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:53:04,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-12-15 08:53:04,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-12-15 08:53:04,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 08:53:04,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483042202] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:53:04,149 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:53:04,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-15 08:53:04,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646144017] [2021-12-15 08:53:04,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:53:04,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-15 08:53:04,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:53:04,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-15 08:53:04,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-15 08:53:04,152 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:04,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:53:04,258 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2021-12-15 08:53:04,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 08:53:04,259 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-15 08:53:04,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:53:04,262 INFO L225 Difference]: With dead ends: 49 [2021-12-15 08:53:04,262 INFO L226 Difference]: Without dead ends: 38 [2021-12-15 08:53:04,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-12-15 08:53:04,266 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:53:04,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 66 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:53:04,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-15 08:53:04,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-12-15 08:53:04,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:04,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-12-15 08:53:04,288 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 20 [2021-12-15 08:53:04,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:53:04,288 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-12-15 08:53:04,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:04,290 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-12-15 08:53:04,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-15 08:53:04,291 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:53:04,291 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:53:04,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-15 08:53:04,509 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,SelfDestructingSolverStorable3 [2021-12-15 08:53:04,509 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:53:04,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:53:04,510 INFO L85 PathProgramCache]: Analyzing trace with hash -949569453, now seen corresponding path program 2 times [2021-12-15 08:53:04,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:53:04,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280130781] [2021-12-15 08:53:04,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:53:04,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:53:04,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:53:04,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 08:53:04,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:53:04,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280130781] [2021-12-15 08:53:04,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280130781] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:53:04,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49402760] [2021-12-15 08:53:04,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 08:53:04,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:53:04,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:53:04,577 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:53:04,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 08:53:04,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 08:53:04,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:53:04,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 08:53:04,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:53:04,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 08:53:04,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:53:04,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 08:53:04,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49402760] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:53:04,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:53:04,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-15 08:53:04,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724726769] [2021-12-15 08:53:04,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:53:04,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 08:53:04,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:53:04,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 08:53:04,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-15 08:53:04,754 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:04,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:53:04,870 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2021-12-15 08:53:04,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 08:53:04,871 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-15 08:53:04,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:53:04,874 INFO L225 Difference]: With dead ends: 70 [2021-12-15 08:53:04,874 INFO L226 Difference]: Without dead ends: 44 [2021-12-15 08:53:04,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-15 08:53:04,877 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 58 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:53:04,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 31 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:53:04,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-15 08:53:04,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2021-12-15 08:53:04,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:04,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-12-15 08:53:04,889 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2021-12-15 08:53:04,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:53:04,891 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-12-15 08:53:04,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:04,891 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-12-15 08:53:04,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-15 08:53:04,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:53:04,893 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:53:04,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 08:53:05,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:53:05,108 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:53:05,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:53:05,108 INFO L85 PathProgramCache]: Analyzing trace with hash -2105967953, now seen corresponding path program 3 times [2021-12-15 08:53:05,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:53:05,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31012354] [2021-12-15 08:53:05,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:53:05,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:53:05,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:53:05,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 08:53:05,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:53:05,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31012354] [2021-12-15 08:53:05,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31012354] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:53:05,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424871755] [2021-12-15 08:53:05,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 08:53:05,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:53:05,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:53:05,168 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:53:05,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 08:53:05,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-15 08:53:05,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:53:05,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 08:53:05,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:53:05,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 08:53:05,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:53:05,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 08:53:05,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424871755] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:53:05,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:53:05,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-15 08:53:05,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440606707] [2021-12-15 08:53:05,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:53:05,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 08:53:05,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:53:05,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 08:53:05,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-15 08:53:05,346 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:05,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:53:05,434 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-12-15 08:53:05,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 08:53:05,434 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-15 08:53:05,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:53:05,437 INFO L225 Difference]: With dead ends: 39 [2021-12-15 08:53:05,437 INFO L226 Difference]: Without dead ends: 31 [2021-12-15 08:53:05,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-12-15 08:53:05,438 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 59 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:53:05,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 21 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:53:05,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-15 08:53:05,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2021-12-15 08:53:05,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:05,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-12-15 08:53:05,446 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 22 [2021-12-15 08:53:05,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:53:05,447 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-12-15 08:53:05,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:05,447 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-12-15 08:53:05,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-15 08:53:05,448 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:53:05,448 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:53:05,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 08:53:05,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:53:05,663 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:53:05,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:53:05,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1032594067, now seen corresponding path program 4 times [2021-12-15 08:53:05,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:53:05,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462064910] [2021-12-15 08:53:05,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:53:05,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:53:05,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:53:06,390 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:53:06,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:53:06,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462064910] [2021-12-15 08:53:06,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462064910] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:53:06,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141953391] [2021-12-15 08:53:06,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 08:53:06,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:53:06,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:53:06,392 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:53:06,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 08:53:06,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 08:53:06,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:53:06,445 WARN L261 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-15 08:53:06,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:53:06,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 08:53:06,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:06,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 08:53:06,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:06,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 08:53:06,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:06,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2021-12-15 08:53:06,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:06,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:06,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2021-12-15 08:53:07,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:07,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:07,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:53:07,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2021-12-15 08:53:07,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:07,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-12-15 08:53:07,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:07,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 32 [2021-12-15 08:53:07,382 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:53:07,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:53:08,382 INFO L354 Elim1Store]: treesize reduction 52, result has 41.6 percent of original size [2021-12-15 08:53:08,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 1074 treesize of output 518 [2021-12-15 08:53:08,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:53:08,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-12-15 08:53:08,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:53:08,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-12-15 08:53:08,611 WARN L838 $PredicateComparison]: unable to prove that (forall ((~N~0 Int) (v_arrayElimArr_3 (Array Int Int))) (let ((.cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (or (<= ~N~0 |c_ULTIMATE.start_main_~i~0#1|) (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) ~N~0) (let ((.cse1 (* 5 ~N~0)) (.cse0 (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_3))) (let ((.cse4 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse2 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (+ .cse2 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5) 5)))))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) (not (= (select v_arrayElimArr_3 .cse5) 5)) (not (= (select v_arrayElimArr_3 |c_ULTIMATE.start_main_~a~0#1.offset|) 5))))) is different from false [2021-12-15 08:53:08,770 WARN L838 $PredicateComparison]: unable to prove that (forall ((~N~0 Int) (v_arrayElimArr_3 (Array Int Int))) (let ((.cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (or (<= ~N~0 (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (< (+ |c_ULTIMATE.start_main_~i~0#1| 2) ~N~0) (let ((.cse1 (* 5 ~N~0)) (.cse0 (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_3))) (let ((.cse4 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse2 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (+ .cse2 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5) 5)))))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) (not (= (select v_arrayElimArr_3 .cse5) 5)) (not (= (select v_arrayElimArr_3 |c_ULTIMATE.start_main_~a~0#1.offset|) 5))))) is different from false [2021-12-15 08:53:08,959 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-12-15 08:53:08,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141953391] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:53:08,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:53:08,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 50 [2021-12-15 08:53:08,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728386773] [2021-12-15 08:53:08,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:53:08,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-15 08:53:08,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:53:08,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-15 08:53:08,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1957, Unknown=2, NotChecked=186, Total=2450 [2021-12-15 08:53:08,962 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 50 states, 50 states have (on average 1.36) internal successors, (68), 50 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:13,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:53:13,167 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2021-12-15 08:53:13,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-15 08:53:13,168 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.36) internal successors, (68), 50 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-15 08:53:13,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:53:13,168 INFO L225 Difference]: With dead ends: 78 [2021-12-15 08:53:13,168 INFO L226 Difference]: Without dead ends: 73 [2021-12-15 08:53:13,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1880 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=888, Invalid=4970, Unknown=2, NotChecked=302, Total=6162 [2021-12-15 08:53:13,171 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 70 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 08:53:13,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 115 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 694 Invalid, 0 Unknown, 95 Unchecked, 0.8s Time] [2021-12-15 08:53:13,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-15 08:53:13,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 44. [2021-12-15 08:53:13,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:13,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2021-12-15 08:53:13,177 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 27 [2021-12-15 08:53:13,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:53:13,178 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2021-12-15 08:53:13,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.36) internal successors, (68), 50 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:13,178 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2021-12-15 08:53:13,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-15 08:53:13,178 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:53:13,178 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:53:13,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 08:53:13,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:53:13,380 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:53:13,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:53:13,380 INFO L85 PathProgramCache]: Analyzing trace with hash -774428629, now seen corresponding path program 1 times [2021-12-15 08:53:13,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:53:13,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474651595] [2021-12-15 08:53:13,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:53:13,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:53:13,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:53:13,513 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 08:53:13,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:53:13,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474651595] [2021-12-15 08:53:13,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474651595] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:53:13,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437136937] [2021-12-15 08:53:13,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:53:13,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:53:13,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:53:13,515 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) [2021-12-15 08:53:13,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 08:53:13,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:53:13,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-15 08:53:13,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:53:13,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-15 08:53:13,629 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 08:53:13,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-15 08:53:13,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-15 08:53:13,679 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 08:53:13,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:53:13,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-15 08:53:13,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-15 08:53:13,781 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 08:53:13,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437136937] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:53:13,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:53:13,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 18 [2021-12-15 08:53:13,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846351502] [2021-12-15 08:53:13,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:53:13,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-15 08:53:13,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:53:13,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-15 08:53:13,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-12-15 08:53:13,783 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:14,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:53:14,006 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2021-12-15 08:53:14,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-15 08:53:14,007 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-15 08:53:14,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:53:14,008 INFO L225 Difference]: With dead ends: 63 [2021-12-15 08:53:14,008 INFO L226 Difference]: Without dead ends: 50 [2021-12-15 08:53:14,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-12-15 08:53:14,009 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:53:14,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 57 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:53:14,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-15 08:53:14,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2021-12-15 08:53:14,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:14,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2021-12-15 08:53:14,014 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 27 [2021-12-15 08:53:14,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:53:14,014 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2021-12-15 08:53:14,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:14,014 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2021-12-15 08:53:14,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-15 08:53:14,016 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:53:14,016 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:53:14,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 08:53:14,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:53:14,235 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:53:14,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:53:14,236 INFO L85 PathProgramCache]: Analyzing trace with hash -132219249, now seen corresponding path program 5 times [2021-12-15 08:53:14,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:53:14,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406002734] [2021-12-15 08:53:14,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:53:14,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:53:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:53:14,305 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 08:53:14,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:53:14,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406002734] [2021-12-15 08:53:14,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406002734] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:53:14,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386642157] [2021-12-15 08:53:14,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 08:53:14,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:53:14,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:53:14,308 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) [2021-12-15 08:53:14,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 08:53:14,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-15 08:53:14,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:53:14,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 08:53:14,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:53:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 08:53:14,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:53:14,510 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 08:53:14,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386642157] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:53:14,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:53:14,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-15 08:53:14,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665714365] [2021-12-15 08:53:14,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:53:14,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 08:53:14,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:53:14,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 08:53:14,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-15 08:53:14,512 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:14,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:53:14,607 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2021-12-15 08:53:14,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 08:53:14,607 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-15 08:53:14,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:53:14,607 INFO L225 Difference]: With dead ends: 77 [2021-12-15 08:53:14,607 INFO L226 Difference]: Without dead ends: 43 [2021-12-15 08:53:14,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-12-15 08:53:14,608 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 51 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:53:14,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 36 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:53:14,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-15 08:53:14,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2021-12-15 08:53:14,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:14,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-12-15 08:53:14,612 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2021-12-15 08:53:14,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:53:14,613 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-12-15 08:53:14,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:14,613 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-12-15 08:53:14,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-15 08:53:14,614 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:53:14,614 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:53:14,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-15 08:53:14,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:53:14,815 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:53:14,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:53:14,816 INFO L85 PathProgramCache]: Analyzing trace with hash -863925553, now seen corresponding path program 6 times [2021-12-15 08:53:14,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:53:14,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050294159] [2021-12-15 08:53:14,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:53:14,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:53:14,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:53:14,889 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 08:53:14,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:53:14,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050294159] [2021-12-15 08:53:14,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050294159] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:53:14,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366653966] [2021-12-15 08:53:14,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 08:53:14,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:53:14,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:53:14,891 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) [2021-12-15 08:53:14,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 08:53:14,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-15 08:53:14,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:53:14,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 08:53:14,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:53:15,042 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 08:53:15,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:53:15,100 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 08:53:15,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366653966] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:53:15,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:53:15,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-15 08:53:15,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194668557] [2021-12-15 08:53:15,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:53:15,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 08:53:15,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:53:15,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 08:53:15,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-15 08:53:15,102 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:15,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:53:15,219 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-12-15 08:53:15,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-15 08:53:15,220 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-15 08:53:15,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:53:15,220 INFO L225 Difference]: With dead ends: 42 [2021-12-15 08:53:15,220 INFO L226 Difference]: Without dead ends: 38 [2021-12-15 08:53:15,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-12-15 08:53:15,221 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 51 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:53:15,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 26 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:53:15,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-15 08:53:15,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-12-15 08:53:15,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:15,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-12-15 08:53:15,225 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 32 [2021-12-15 08:53:15,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:53:15,226 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-12-15 08:53:15,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:15,226 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-12-15 08:53:15,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-15 08:53:15,227 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:53:15,227 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:53:15,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 08:53:15,439 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,SelfDestructingSolverStorable9 [2021-12-15 08:53:15,439 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:53:15,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:53:15,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1250534543, now seen corresponding path program 7 times [2021-12-15 08:53:15,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:53:15,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753959695] [2021-12-15 08:53:15,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:53:15,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:53:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:53:16,585 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:53:16,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:53:16,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753959695] [2021-12-15 08:53:16,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753959695] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:53:16,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284290763] [2021-12-15 08:53:16,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 08:53:16,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:53:16,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:53:16,590 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) [2021-12-15 08:53:16,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 08:53:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:53:16,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-15 08:53:16,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:53:16,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 08:53:16,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 08:53:16,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 08:53:16,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 08:53:16,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 08:53:16,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2021-12-15 08:53:17,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:17,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 37 [2021-12-15 08:53:17,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:17,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:17,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:17,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 47 [2021-12-15 08:53:17,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:17,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:53:17,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:17,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:17,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2021-12-15 08:53:17,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:17,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:17,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:17,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:53:17,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:17,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 49 [2021-12-15 08:53:17,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 47 [2021-12-15 08:53:17,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 36 [2021-12-15 08:53:17,770 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:53:17,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:53:20,289 INFO L354 Elim1Store]: treesize reduction 476, result has 26.2 percent of original size [2021-12-15 08:53:20,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 6 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 9 new quantified variables, introduced 39 case distinctions, treesize of input 90928 treesize of output 27756 [2021-12-15 08:53:20,482 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-15 08:53:20,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-15 08:53:20,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-12-15 08:53:20,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083297278] [2021-12-15 08:53:20,483 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-15 08:53:20,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-15 08:53:20,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:53:20,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-15 08:53:20,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=3111, Unknown=0, NotChecked=0, Total=3540 [2021-12-15 08:53:20,485 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:22,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:53:22,357 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2021-12-15 08:53:22,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-15 08:53:22,358 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-15 08:53:22,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:53:22,358 INFO L225 Difference]: With dead ends: 71 [2021-12-15 08:53:22,358 INFO L226 Difference]: Without dead ends: 67 [2021-12-15 08:53:22,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 20 SyntacticMatches, 10 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2030 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=822, Invalid=5984, Unknown=0, NotChecked=0, Total=6806 [2021-12-15 08:53:22,360 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 30 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 08:53:22,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 75 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 08:53:22,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-15 08:53:22,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2021-12-15 08:53:22,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.14) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:22,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-12-15 08:53:22,366 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 34 [2021-12-15 08:53:22,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:53:22,366 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-12-15 08:53:22,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:22,367 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-12-15 08:53:22,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-15 08:53:22,367 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:53:22,367 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:53:22,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-15 08:53:22,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:53:22,571 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:53:22,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:53:22,572 INFO L85 PathProgramCache]: Analyzing trace with hash 2033315503, now seen corresponding path program 2 times [2021-12-15 08:53:22,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:53:22,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483458485] [2021-12-15 08:53:22,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:53:22,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:53:22,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:53:22,707 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 08:53:22,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:53:22,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483458485] [2021-12-15 08:53:22,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483458485] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:53:22,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466941727] [2021-12-15 08:53:22,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 08:53:22,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:53:22,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:53:22,716 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) [2021-12-15 08:53:22,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-15 08:53:22,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 08:53:22,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:53:22,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-15 08:53:22,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:53:22,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-15 08:53:22,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:22,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-15 08:53:22,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:22,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-15 08:53:22,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 08:53:22,986 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 08:53:22,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:53:23,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-15 08:53:23,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-15 08:53:23,100 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 08:53:23,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466941727] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:53:23,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:53:23,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 19 [2021-12-15 08:53:23,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185280878] [2021-12-15 08:53:23,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:53:23,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-15 08:53:23,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:53:23,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-15 08:53:23,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-12-15 08:53:23,101 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:23,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:53:23,258 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2021-12-15 08:53:23,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-15 08:53:23,258 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-15 08:53:23,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:53:23,258 INFO L225 Difference]: With dead ends: 74 [2021-12-15 08:53:23,258 INFO L226 Difference]: Without dead ends: 59 [2021-12-15 08:53:23,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-12-15 08:53:23,259 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:53:23,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 73 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:53:23,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-15 08:53:23,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2021-12-15 08:53:23,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 51 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:23,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2021-12-15 08:53:23,265 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 34 [2021-12-15 08:53:23,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:53:23,266 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2021-12-15 08:53:23,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:23,266 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2021-12-15 08:53:23,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-15 08:53:23,267 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:53:23,267 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:53:23,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-15 08:53:23,471 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,SelfDestructingSolverStorable11 [2021-12-15 08:53:23,471 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:53:23,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:53:23,472 INFO L85 PathProgramCache]: Analyzing trace with hash 880380819, now seen corresponding path program 8 times [2021-12-15 08:53:23,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:53:23,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512544882] [2021-12-15 08:53:23,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:53:23,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:53:23,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:53:23,541 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 08:53:23,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:53:23,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512544882] [2021-12-15 08:53:23,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512544882] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:53:23,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702675110] [2021-12-15 08:53:23,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 08:53:23,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:53:23,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:53:23,543 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) [2021-12-15 08:53:23,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-15 08:53:23,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 08:53:23,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:53:23,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-15 08:53:23,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:53:23,726 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 08:53:23,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:53:23,785 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 08:53:23,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702675110] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:53:23,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:53:23,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-15 08:53:23,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671968554] [2021-12-15 08:53:23,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:53:23,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-15 08:53:23,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:53:23,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-15 08:53:23,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-15 08:53:23,787 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:23,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:53:23,922 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2021-12-15 08:53:23,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 08:53:23,923 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-15 08:53:23,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:53:23,923 INFO L225 Difference]: With dead ends: 96 [2021-12-15 08:53:23,923 INFO L226 Difference]: Without dead ends: 62 [2021-12-15 08:53:23,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-12-15 08:53:23,924 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 86 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:53:23,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 39 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:53:23,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-15 08:53:23,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2021-12-15 08:53:23,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:23,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-12-15 08:53:23,929 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 36 [2021-12-15 08:53:23,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:53:23,929 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-12-15 08:53:23,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:23,930 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-12-15 08:53:23,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-15 08:53:23,930 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:53:23,930 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:53:23,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-15 08:53:24,135 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,SelfDestructingSolverStorable12 [2021-12-15 08:53:24,135 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:53:24,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:53:24,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1466624367, now seen corresponding path program 9 times [2021-12-15 08:53:24,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:53:24,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888829192] [2021-12-15 08:53:24,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:53:24,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:53:24,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:53:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 08:53:24,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:53:24,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888829192] [2021-12-15 08:53:24,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888829192] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:53:24,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635202260] [2021-12-15 08:53:24,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 08:53:24,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:53:24,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:53:24,215 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) [2021-12-15 08:53:24,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-15 08:53:24,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-15 08:53:24,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:53:24,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-15 08:53:24,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:53:24,404 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 08:53:24,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:53:24,465 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 08:53:24,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635202260] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:53:24,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:53:24,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-15 08:53:24,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599446511] [2021-12-15 08:53:24,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:53:24,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-15 08:53:24,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:53:24,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-15 08:53:24,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-15 08:53:24,466 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:24,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:53:24,617 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2021-12-15 08:53:24,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-15 08:53:24,617 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-15 08:53:24,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:53:24,618 INFO L225 Difference]: With dead ends: 57 [2021-12-15 08:53:24,618 INFO L226 Difference]: Without dead ends: 45 [2021-12-15 08:53:24,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-12-15 08:53:24,619 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 72 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:53:24,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 30 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:53:24,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-15 08:53:24,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-12-15 08:53:24,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:24,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-12-15 08:53:24,624 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 36 [2021-12-15 08:53:24,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:53:24,624 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-12-15 08:53:24,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:24,624 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-12-15 08:53:24,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-15 08:53:24,625 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:53:24,625 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:53:24,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-15 08:53:24,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-15 08:53:24,831 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:53:24,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:53:24,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1118330549, now seen corresponding path program 10 times [2021-12-15 08:53:24,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:53:24,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225988185] [2021-12-15 08:53:24,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:53:24,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:53:24,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:53:26,437 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:53:26,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:53:26,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225988185] [2021-12-15 08:53:26,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225988185] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:53:26,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886252688] [2021-12-15 08:53:26,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 08:53:26,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:53:26,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:53:26,439 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:53:26,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-15 08:53:26,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 08:53:26,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:53:26,504 WARN L261 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-15 08:53:26,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:53:26,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 08:53:26,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:26,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 08:53:26,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:26,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 08:53:26,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:26,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 08:53:26,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:26,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 08:53:27,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:27,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2021-12-15 08:53:27,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:27,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:27,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 37 [2021-12-15 08:53:27,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:27,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:27,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:27,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:27,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 49 [2021-12-15 08:53:27,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:27,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:27,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:27,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:27,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:27,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:27,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:27,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2021-12-15 08:53:27,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:27,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:27,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:53:27,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:27,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:27,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:27,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:27,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:27,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 63 [2021-12-15 08:53:28,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:28,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:28,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:28,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:28,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:28,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:53:28,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:28,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:28,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:28,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 61 [2021-12-15 08:53:28,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:28,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:28,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:28,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:28,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:28,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:28,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:28,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:28,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:28,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:53:28,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 63 [2021-12-15 08:53:28,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:28,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 58 [2021-12-15 08:53:28,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:53:28,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 39 [2021-12-15 08:53:28,554 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:53:28,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:53:38,278 INFO L354 Elim1Store]: treesize reduction 3907, result has 18.3 percent of original size [2021-12-15 08:53:38,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 23 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 27 new quantified variables, introduced 190 case distinctions, treesize of input 25397686 treesize of output 5765192 [2021-12-15 08:53:45,931 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-15 08:53:45,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-15 08:53:45,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-12-15 08:53:45,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883857631] [2021-12-15 08:53:45,931 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-15 08:53:45,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-15 08:53:45,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:53:45,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-15 08:53:45,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=687, Invalid=5955, Unknown=0, NotChecked=0, Total=6642 [2021-12-15 08:53:45,934 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 32 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:48,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:53:48,992 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2021-12-15 08:53:48,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-15 08:53:48,993 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-15 08:53:48,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:53:48,993 INFO L225 Difference]: With dead ends: 85 [2021-12-15 08:53:48,993 INFO L226 Difference]: Without dead ends: 81 [2021-12-15 08:53:48,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3786 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=1278, Invalid=11378, Unknown=0, NotChecked=0, Total=12656 [2021-12-15 08:53:48,997 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 45 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 08:53:48,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 91 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 08:53:48,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-15 08:53:49,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 61. [2021-12-15 08:53:49,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:49,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2021-12-15 08:53:49,004 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 41 [2021-12-15 08:53:49,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:53:49,004 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2021-12-15 08:53:49,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:53:49,004 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2021-12-15 08:53:49,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-15 08:53:49,005 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:53:49,005 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:53:49,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-15 08:53:49,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-15 08:53:49,223 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:53:49,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:53:49,224 INFO L85 PathProgramCache]: Analyzing trace with hash 97262195, now seen corresponding path program 3 times [2021-12-15 08:53:49,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:53:49,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936700786] [2021-12-15 08:53:49,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:53:49,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:53:49,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:53:49,400 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-15 08:53:49,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:53:49,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936700786] [2021-12-15 08:53:49,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936700786] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:53:49,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913695813] [2021-12-15 08:53:49,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 08:53:49,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:53:49,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:53:49,401 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:53:49,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-15 08:53:49,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-15 08:53:49,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:53:49,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-15 08:53:49,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:53:49,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 08:53:49,684 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-12-15 08:53:49,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 34 [2021-12-15 08:53:49,816 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-12-15 08:53:49,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 48 [2021-12-15 08:53:49,926 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-12-15 08:53:49,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 38 [2021-12-15 08:53:50,056 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 08:53:50,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2021-12-15 08:53:50,322 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:53:50,323 INFO L328 TraceCheckSpWp]: Computing backward predicates...