./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/heavy-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c 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/loops/heavy-1.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 544ff1a31d34f1c818140bb31fb5c7091aef904c3b9f7e17a0cc8560e99eb61a --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 23:49:12,240 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 23:49:12,241 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 23:49:12,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 23:49:12,261 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 23:49:12,262 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 23:49:12,264 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 23:49:12,266 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 23:49:12,267 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 23:49:12,268 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 23:49:12,269 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 23:49:12,270 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 23:49:12,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 23:49:12,273 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 23:49:12,275 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 23:49:12,276 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 23:49:12,277 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 23:49:12,280 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 23:49:12,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 23:49:12,282 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 23:49:12,285 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 23:49:12,285 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 23:49:12,286 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 23:49:12,287 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 23:49:12,289 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 23:49:12,292 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 23:49:12,292 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 23:49:12,292 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 23:49:12,293 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 23:49:12,293 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 23:49:12,294 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 23:49:12,294 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 23:49:12,295 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 23:49:12,296 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 23:49:12,297 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 23:49:12,297 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 23:49:12,297 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 23:49:12,298 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 23:49:12,298 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 23:49:12,299 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 23:49:12,299 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 23:49:12,300 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 23:49:12,316 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 23:49:12,316 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 23:49:12,317 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 23:49:12,317 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 23:49:12,318 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 23:49:12,318 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 23:49:12,318 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 23:49:12,318 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 23:49:12,318 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 23:49:12,319 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 23:49:12,319 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 23:49:12,319 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 23:49:12,319 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 23:49:12,320 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 23:49:12,320 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 23:49:12,320 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 23:49:12,320 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 23:49:12,320 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 23:49:12,320 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 23:49:12,320 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 23:49:12,320 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 23:49:12,321 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 23:49:12,321 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 23:49:12,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 23:49:12,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 23:49:12,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 23:49:12,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 23:49:12,322 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 23:49:12,322 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 23:49:12,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 23:49:12,322 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 23:49:12,323 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 23:49:12,323 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 23:49:12,323 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 23:49:12,323 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 23:49:12,323 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 544ff1a31d34f1c818140bb31fb5c7091aef904c3b9f7e17a0cc8560e99eb61a [2023-02-17 23:49:12,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 23:49:12,555 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 23:49:12,558 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 23:49:12,559 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 23:49:12,559 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 23:49:12,560 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/heavy-1.c [2023-02-17 23:49:13,568 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 23:49:13,735 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 23:49:13,736 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/heavy-1.c [2023-02-17 23:49:13,740 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e65f29023/77a83e1cfccc4ee08a7c3dd8f26335b6/FLAGfb321ca26 [2023-02-17 23:49:13,750 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e65f29023/77a83e1cfccc4ee08a7c3dd8f26335b6 [2023-02-17 23:49:13,751 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 23:49:13,752 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 23:49:13,753 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 23:49:13,753 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 23:49:13,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 23:49:13,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 11:49:13" (1/1) ... [2023-02-17 23:49:13,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cd7cc5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:49:13, skipping insertion in model container [2023-02-17 23:49:13,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 11:49:13" (1/1) ... [2023-02-17 23:49:13,762 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 23:49:13,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 23:49:13,856 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/heavy-1.c[600,613] [2023-02-17 23:49:13,860 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 23:49:13,889 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 23:49:13,899 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/heavy-1.c[600,613] [2023-02-17 23:49:13,900 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 23:49:13,926 INFO L208 MainTranslator]: Completed translation [2023-02-17 23:49:13,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:49:13 WrapperNode [2023-02-17 23:49:13,927 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 23:49:13,927 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 23:49:13,927 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 23:49:13,928 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 23:49:13,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:49:13" (1/1) ... [2023-02-17 23:49:13,936 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:49:13" (1/1) ... [2023-02-17 23:49:13,946 INFO L138 Inliner]: procedures = 12, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2023-02-17 23:49:13,946 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 23:49:13,946 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 23:49:13,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 23:49:13,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 23:49:13,952 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:49:13" (1/1) ... [2023-02-17 23:49:13,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:49:13" (1/1) ... [2023-02-17 23:49:13,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:49:13" (1/1) ... [2023-02-17 23:49:13,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:49:13" (1/1) ... [2023-02-17 23:49:13,956 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:49:13" (1/1) ... [2023-02-17 23:49:13,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:49:13" (1/1) ... [2023-02-17 23:49:13,959 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:49:13" (1/1) ... [2023-02-17 23:49:13,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:49:13" (1/1) ... [2023-02-17 23:49:13,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 23:49:13,961 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 23:49:13,961 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 23:49:13,961 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 23:49:13,962 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:49:13" (1/1) ... [2023-02-17 23:49:13,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 23:49:13,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 23:49:13,994 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-17 23:49:13,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-17 23:49:14,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 23:49:14,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 23:49:14,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 23:49:14,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 23:49:14,017 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 23:49:14,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 23:49:14,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-02-17 23:49:14,065 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 23:49:14,067 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 23:49:14,177 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 23:49:14,181 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 23:49:14,181 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-17 23:49:14,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 11:49:14 BoogieIcfgContainer [2023-02-17 23:49:14,182 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 23:49:14,185 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 23:49:14,186 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 23:49:14,188 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 23:49:14,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 11:49:13" (1/3) ... [2023-02-17 23:49:14,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dfc0868 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 11:49:14, skipping insertion in model container [2023-02-17 23:49:14,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:49:13" (2/3) ... [2023-02-17 23:49:14,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dfc0868 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 11:49:14, skipping insertion in model container [2023-02-17 23:49:14,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 11:49:14" (3/3) ... [2023-02-17 23:49:14,194 INFO L112 eAbstractionObserver]: Analyzing ICFG heavy-1.c [2023-02-17 23:49:14,205 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 23:49:14,205 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 23:49:14,233 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 23:49:14,237 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@619a7583, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 23:49:14,237 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 23:49:14,243 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:49:14,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-02-17 23:49:14,248 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 23:49:14,249 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-02-17 23:49:14,249 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 23:49:14,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 23:49:14,253 INFO L85 PathProgramCache]: Analyzing trace with hash 28726599, now seen corresponding path program 1 times [2023-02-17 23:49:14,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 23:49:14,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201994031] [2023-02-17 23:49:14,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:49:14,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 23:49:14,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:49:14,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 23:49:14,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 23:49:14,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201994031] [2023-02-17 23:49:14,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201994031] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 23:49:14,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 23:49:14,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 23:49:14,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732607653] [2023-02-17 23:49:14,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 23:49:14,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 23:49:14,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 23:49:14,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 23:49:14,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 23:49:14,388 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:49:14,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 23:49:14,402 INFO L93 Difference]: Finished difference Result 26 states and 38 transitions. [2023-02-17 23:49:14,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 23:49:14,404 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2023-02-17 23:49:14,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 23:49:14,409 INFO L225 Difference]: With dead ends: 26 [2023-02-17 23:49:14,409 INFO L226 Difference]: Without dead ends: 11 [2023-02-17 23:49:14,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 23:49:14,415 INFO L413 NwaCegarLoop]: 16 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, 16 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 23:49:14,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 23:49:14,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-02-17 23:49:14,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-02-17 23:49:14,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:49:14,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2023-02-17 23:49:14,433 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 5 [2023-02-17 23:49:14,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 23:49:14,433 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2023-02-17 23:49:14,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:49:14,434 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2023-02-17 23:49:14,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-02-17 23:49:14,434 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 23:49:14,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-02-17 23:49:14,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 23:49:14,435 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 23:49:14,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 23:49:14,435 INFO L85 PathProgramCache]: Analyzing trace with hash 28697769, now seen corresponding path program 1 times [2023-02-17 23:49:14,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 23:49:14,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829905627] [2023-02-17 23:49:14,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:49:14,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 23:49:14,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:49:14,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 23:49:14,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 23:49:14,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829905627] [2023-02-17 23:49:14,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829905627] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 23:49:14,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 23:49:14,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 23:49:14,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641609481] [2023-02-17 23:49:14,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 23:49:14,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 23:49:14,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 23:49:14,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 23:49:14,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 23:49:14,502 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:49:14,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 23:49:14,533 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2023-02-17 23:49:14,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 23:49:14,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2023-02-17 23:49:14,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 23:49:14,534 INFO L225 Difference]: With dead ends: 20 [2023-02-17 23:49:14,534 INFO L226 Difference]: Without dead ends: 17 [2023-02-17 23:49:14,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 23:49:14,535 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 23:49:14,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 18 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 23:49:14,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-17 23:49:14,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 12. [2023-02-17 23:49:14,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:49:14,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2023-02-17 23:49:14,539 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 5 [2023-02-17 23:49:14,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 23:49:14,539 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2023-02-17 23:49:14,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:49:14,541 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2023-02-17 23:49:14,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-17 23:49:14,541 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 23:49:14,541 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 23:49:14,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 23:49:14,542 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 23:49:14,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 23:49:14,544 INFO L85 PathProgramCache]: Analyzing trace with hash 269702257, now seen corresponding path program 1 times [2023-02-17 23:49:14,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 23:49:14,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585865729] [2023-02-17 23:49:14,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:49:14,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 23:49:14,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:49:14,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 23:49:14,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 23:49:14,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585865729] [2023-02-17 23:49:14,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585865729] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 23:49:14,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 23:49:14,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 23:49:14,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374223926] [2023-02-17 23:49:14,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 23:49:14,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 23:49:14,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 23:49:14,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 23:49:14,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 23:49:14,613 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:49:14,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 23:49:14,640 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2023-02-17 23:49:14,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 23:49:14,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2023-02-17 23:49:14,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 23:49:14,641 INFO L225 Difference]: With dead ends: 25 [2023-02-17 23:49:14,641 INFO L226 Difference]: Without dead ends: 16 [2023-02-17 23:49:14,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 23:49:14,642 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 23:49:14,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 17 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 23:49:14,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-02-17 23:49:14,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2023-02-17 23:49:14,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:49:14,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-02-17 23:49:14,645 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2023-02-17 23:49:14,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 23:49:14,645 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-02-17 23:49:14,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:49:14,646 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-02-17 23:49:14,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-17 23:49:14,649 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 23:49:14,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 23:49:14,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 23:49:14,650 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 23:49:14,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 23:49:14,650 INFO L85 PathProgramCache]: Analyzing trace with hash 904437765, now seen corresponding path program 1 times [2023-02-17 23:49:14,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 23:49:14,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757310089] [2023-02-17 23:49:14,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:49:14,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 23:49:14,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:49:14,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 23:49:14,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 23:49:14,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757310089] [2023-02-17 23:49:14,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757310089] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 23:49:14,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 23:49:14,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 23:49:14,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163486636] [2023-02-17 23:49:14,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 23:49:14,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 23:49:14,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 23:49:14,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 23:49:14,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 23:49:14,729 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:49:14,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 23:49:14,743 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2023-02-17 23:49:14,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 23:49:14,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2023-02-17 23:49:14,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 23:49:14,745 INFO L225 Difference]: With dead ends: 25 [2023-02-17 23:49:14,745 INFO L226 Difference]: Without dead ends: 15 [2023-02-17 23:49:14,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 23:49:14,746 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 23:49:14,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 19 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 23:49:14,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-02-17 23:49:14,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2023-02-17 23:49:14,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:49:14,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2023-02-17 23:49:14,754 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2023-02-17 23:49:14,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 23:49:14,754 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2023-02-17 23:49:14,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:49:14,755 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2023-02-17 23:49:14,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-17 23:49:14,755 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 23:49:14,755 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 23:49:14,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 23:49:14,755 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 23:49:14,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 23:49:14,756 INFO L85 PathProgramCache]: Analyzing trace with hash -2012164797, now seen corresponding path program 1 times [2023-02-17 23:49:14,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 23:49:14,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902974460] [2023-02-17 23:49:14,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:49:14,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 23:49:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:49:14,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 23:49:14,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 23:49:14,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902974460] [2023-02-17 23:49:14,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902974460] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 23:49:14,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978004945] [2023-02-17 23:49:14,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:49:14,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 23:49:14,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 23:49:14,837 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 23:49:14,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 23:49:14,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:49:14,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-17 23:49:14,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 23:49:14,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 23:49:14,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 23:49:14,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 23:49:14,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978004945] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 23:49:14,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 23:49:14,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-02-17 23:49:14,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072607549] [2023-02-17 23:49:14,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 23:49:14,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 23:49:14,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 23:49:14,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 23:49:14,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-02-17 23:49:14,967 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:49:15,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 23:49:15,062 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2023-02-17 23:49:15,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 23:49:15,063 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-17 23:49:15,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 23:49:15,064 INFO L225 Difference]: With dead ends: 52 [2023-02-17 23:49:15,064 INFO L226 Difference]: Without dead ends: 41 [2023-02-17 23:49:15,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2023-02-17 23:49:15,065 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 36 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 23:49:15,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 30 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 23:49:15,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-17 23:49:15,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2023-02-17 23:49:15,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) [2023-02-17 23:49:15,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2023-02-17 23:49:15,084 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 13 [2023-02-17 23:49:15,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 23:49:15,084 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2023-02-17 23:49:15,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:49:15,085 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2023-02-17 23:49:15,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-17 23:49:15,086 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 23:49:15,086 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 23:49:15,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 23:49:15,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 23:49:15,291 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 23:49:15,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 23:49:15,291 INFO L85 PathProgramCache]: Analyzing trace with hash 76140657, now seen corresponding path program 2 times [2023-02-17 23:49:15,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 23:49:15,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368647112] [2023-02-17 23:49:15,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:49:15,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 23:49:15,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:49:15,480 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 44 proven. 4 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-02-17 23:49:15,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 23:49:15,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368647112] [2023-02-17 23:49:15,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368647112] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 23:49:15,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966031232] [2023-02-17 23:49:15,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 23:49:15,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 23:49:15,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 23:49:15,482 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) [2023-02-17 23:49:15,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 23:49:15,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 23:49:15,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 23:49:15,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-17 23:49:15,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 23:49:15,570 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 44 proven. 4 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-02-17 23:49:15,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 23:49:15,642 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 65 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-17 23:49:15,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966031232] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 23:49:15,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 23:49:15,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 8] total 15 [2023-02-17 23:49:15,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249668029] [2023-02-17 23:49:15,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 23:49:15,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 23:49:15,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 23:49:15,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 23:49:15,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2023-02-17 23:49:15,644 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:49:15,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 23:49:15,874 INFO L93 Difference]: Finished difference Result 134 states and 166 transitions. [2023-02-17 23:49:15,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-17 23:49:15,874 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 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 [2023-02-17 23:49:15,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 23:49:15,875 INFO L225 Difference]: With dead ends: 134 [2023-02-17 23:49:15,875 INFO L226 Difference]: Without dead ends: 88 [2023-02-17 23:49:15,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2023-02-17 23:49:15,876 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 45 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 23:49:15,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 40 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 23:49:15,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-02-17 23:49:15,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2023-02-17 23:49:15,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1728395061728396) internal successors, (95), 81 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:49:15,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2023-02-17 23:49:15,891 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 36 [2023-02-17 23:49:15,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 23:49:15,891 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2023-02-17 23:49:15,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:49:15,892 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2023-02-17 23:49:15,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-17 23:49:15,894 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 23:49:15,894 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 23:49:15,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 23:49:16,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-02-17 23:49:16,102 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 23:49:16,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 23:49:16,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1898529999, now seen corresponding path program 3 times [2023-02-17 23:49:16,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 23:49:16,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394655338] [2023-02-17 23:49:16,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:49:16,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 23:49:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:49:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 182 proven. 36 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2023-02-17 23:49:16,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 23:49:16,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394655338] [2023-02-17 23:49:16,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394655338] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 23:49:16,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942408520] [2023-02-17 23:49:16,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 23:49:16,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 23:49:16,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 23:49:16,432 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) [2023-02-17 23:49:16,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 23:49:16,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-17 23:49:16,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 23:49:16,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 23:49:16,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 23:49:16,513 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2023-02-17 23:49:16,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 23:49:16,538 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2023-02-17 23:49:16,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942408520] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 23:49:16,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 23:49:16,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 13 [2023-02-17 23:49:16,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299121510] [2023-02-17 23:49:16,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 23:49:16,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 23:49:16,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 23:49:16,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 23:49:16,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-02-17 23:49:16,541 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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) [2023-02-17 23:49:16,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 23:49:16,898 INFO L93 Difference]: Finished difference Result 385 states and 461 transitions. [2023-02-17 23:49:16,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-17 23:49:16,899 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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 56 [2023-02-17 23:49:16,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 23:49:16,900 INFO L225 Difference]: With dead ends: 385 [2023-02-17 23:49:16,900 INFO L226 Difference]: Without dead ends: 306 [2023-02-17 23:49:16,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=320, Invalid=1402, Unknown=0, NotChecked=0, Total=1722 [2023-02-17 23:49:16,903 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 88 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 23:49:16,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 63 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 23:49:16,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2023-02-17 23:49:16,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 290. [2023-02-17 23:49:16,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.0726643598615917) internal successors, (310), 289 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:49:16,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 310 transitions. [2023-02-17 23:49:16,950 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 310 transitions. Word has length 56 [2023-02-17 23:49:16,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 23:49:16,950 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 310 transitions. [2023-02-17 23:49:16,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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) [2023-02-17 23:49:16,951 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 310 transitions. [2023-02-17 23:49:16,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2023-02-17 23:49:16,960 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 23:49:16,960 INFO L195 NwaCegarLoop]: trace histogram [112, 112, 16, 16, 16, 4, 4, 4, 1, 1, 1, 1, 1] [2023-02-17 23:49:16,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 23:49:17,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 23:49:17,167 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 23:49:17,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 23:49:17,168 INFO L85 PathProgramCache]: Analyzing trace with hash 153690793, now seen corresponding path program 4 times [2023-02-17 23:49:17,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 23:49:17,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582378940] [2023-02-17 23:49:17,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:49:17,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 23:49:17,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:49:18,453 INFO L134 CoverageAnalysis]: Checked inductivity of 14670 backedges. 1718 proven. 49 refuted. 0 times theorem prover too weak. 12903 trivial. 0 not checked. [2023-02-17 23:49:18,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 23:49:18,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582378940] [2023-02-17 23:49:18,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582378940] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 23:49:18,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711544165] [2023-02-17 23:49:18,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 23:49:18,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 23:49:18,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 23:49:18,455 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) [2023-02-17 23:49:18,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 23:49:18,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 23:49:18,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 23:49:18,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-17 23:49:18,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 23:49:18,822 INFO L134 CoverageAnalysis]: Checked inductivity of 14670 backedges. 5551 proven. 737 refuted. 0 times theorem prover too weak. 8382 trivial. 0 not checked. [2023-02-17 23:49:18,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 23:49:19,033 INFO L134 CoverageAnalysis]: Checked inductivity of 14670 backedges. 5578 proven. 710 refuted. 0 times theorem prover too weak. 8382 trivial. 0 not checked. [2023-02-17 23:49:19,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711544165] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 23:49:19,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 23:49:19,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 30 [2023-02-17 23:49:19,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276686859] [2023-02-17 23:49:19,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 23:49:19,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-17 23:49:19,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 23:49:19,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-17 23:49:19,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2023-02-17 23:49:19,036 INFO L87 Difference]: Start difference. First operand 290 states and 310 transitions. Second operand has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 30 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:49:21,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 23:49:21,717 INFO L93 Difference]: Finished difference Result 1089 states and 1216 transitions. [2023-02-17 23:49:21,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-02-17 23:49:21,717 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 30 states have internal predecessors, (92), 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 289 [2023-02-17 23:49:21,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 23:49:21,720 INFO L225 Difference]: With dead ends: 1089 [2023-02-17 23:49:21,720 INFO L226 Difference]: Without dead ends: 818 [2023-02-17 23:49:21,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 669 GetRequests, 554 SyntacticMatches, 4 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4368 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2157, Invalid=10499, Unknown=0, NotChecked=0, Total=12656 [2023-02-17 23:49:21,724 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 140 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-17 23:49:21,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 116 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1268 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-17 23:49:21,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2023-02-17 23:49:21,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 778. [2023-02-17 23:49:21,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 1.057915057915058) internal successors, (822), 777 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:49:21,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 822 transitions. [2023-02-17 23:49:21,770 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 822 transitions. Word has length 289 [2023-02-17 23:49:21,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 23:49:21,771 INFO L495 AbstractCegarLoop]: Abstraction has 778 states and 822 transitions. [2023-02-17 23:49:21,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 30 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:49:21,772 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 822 transitions. [2023-02-17 23:49:21,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 778 [2023-02-17 23:49:21,781 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 23:49:21,781 INFO L195 NwaCegarLoop]: trace histogram [320, 320, 40, 40, 40, 4, 4, 4, 1, 1, 1, 1, 1] [2023-02-17 23:49:21,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 23:49:21,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 23:49:21,989 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 23:49:21,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 23:49:21,990 INFO L85 PathProgramCache]: Analyzing trace with hash -509282647, now seen corresponding path program 5 times [2023-02-17 23:49:21,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 23:49:21,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087130512] [2023-02-17 23:49:21,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:49:21,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 23:49:23,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:49:25,314 INFO L134 CoverageAnalysis]: Checked inductivity of 117402 backedges. 5702 proven. 64 refuted. 0 times theorem prover too weak. 111636 trivial. 0 not checked. [2023-02-17 23:49:25,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 23:49:25,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087130512] [2023-02-17 23:49:25,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087130512] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 23:49:25,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206876751] [2023-02-17 23:49:25,315 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 23:49:25,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 23:49:25,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 23:49:25,316 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) [2023-02-17 23:49:25,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 23:49:27,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-02-17 23:49:27,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 23:49:27,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-17 23:49:27,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 23:49:27,576 INFO L134 CoverageAnalysis]: Checked inductivity of 117402 backedges. 55460 proven. 64 refuted. 0 times theorem prover too weak. 61878 trivial. 0 not checked. [2023-02-17 23:49:27,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 23:49:27,720 INFO L134 CoverageAnalysis]: Checked inductivity of 117402 backedges. 55460 proven. 64 refuted. 0 times theorem prover too weak. 61878 trivial. 0 not checked. [2023-02-17 23:49:27,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206876751] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 23:49:27,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 23:49:27,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2023-02-17 23:49:27,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156532240] [2023-02-17 23:49:27,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 23:49:27,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-17 23:49:27,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 23:49:27,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-17 23:49:27,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2023-02-17 23:49:27,723 INFO L87 Difference]: Start difference. First operand 778 states and 822 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:49:28,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 23:49:28,427 INFO L93 Difference]: Finished difference Result 2335 states and 2822 transitions. [2023-02-17 23:49:28,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-17 23:49:28,428 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 777 [2023-02-17 23:49:28,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 23:49:28,433 INFO L225 Difference]: With dead ends: 2335 [2023-02-17 23:49:28,433 INFO L226 Difference]: Without dead ends: 1578 [2023-02-17 23:49:28,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1571 GetRequests, 1536 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=306, Invalid=506, Unknown=0, NotChecked=0, Total=812 [2023-02-17 23:49:28,436 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 23:49:28,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 83 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 23:49:28,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2023-02-17 23:49:28,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1578. [2023-02-17 23:49:28,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1577 states have (on average 1.0285351934051998) internal successors, (1622), 1577 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:49:28,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 1622 transitions. [2023-02-17 23:49:28,540 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 1622 transitions. Word has length 777 [2023-02-17 23:49:28,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 23:49:28,540 INFO L495 AbstractCegarLoop]: Abstraction has 1578 states and 1622 transitions. [2023-02-17 23:49:28,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:49:28,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 1622 transitions. [2023-02-17 23:49:28,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1578 [2023-02-17 23:49:28,593 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 23:49:28,594 INFO L195 NwaCegarLoop]: trace histogram [720, 720, 40, 40, 40, 4, 4, 4, 1, 1, 1, 1, 1] [2023-02-17 23:49:28,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-17 23:49:28,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 23:49:28,801 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 23:49:28,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 23:49:28,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1381259607, now seen corresponding path program 6 times [2023-02-17 23:49:28,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 23:49:28,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45634337] [2023-02-17 23:49:28,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:49:28,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 23:49:31,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:49:39,224 INFO L134 CoverageAnalysis]: Checked inductivity of 549002 backedges. 26762 proven. 324 refuted. 0 times theorem prover too weak. 521916 trivial. 0 not checked. [2023-02-17 23:49:39,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 23:49:39,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45634337] [2023-02-17 23:49:39,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45634337] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 23:49:39,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594346109] [2023-02-17 23:49:39,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 23:49:39,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 23:49:39,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 23:49:39,226 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) [2023-02-17 23:49:39,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process