./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-simple/deep-nested.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e1ff0e6 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/loop-simple/deep-nested.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 abddf9ff39262b7e56b56d5272c2d316261bfefbe98fc5849d87d962ab5f7694 --- Real Ultimate output --- This is Ultimate 0.2.2-?-7e1ff0e [2023-02-14 23:26:06,340 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 23:26:06,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 23:26:06,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 23:26:06,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 23:26:06,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 23:26:06,373 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 23:26:06,375 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 23:26:06,379 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 23:26:06,383 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 23:26:06,384 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 23:26:06,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 23:26:06,385 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 23:26:06,385 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 23:26:06,386 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 23:26:06,387 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 23:26:06,387 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 23:26:06,388 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 23:26:06,389 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 23:26:06,390 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 23:26:06,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 23:26:06,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 23:26:06,397 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 23:26:06,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 23:26:06,409 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 23:26:06,410 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 23:26:06,410 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 23:26:06,411 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 23:26:06,411 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 23:26:06,412 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 23:26:06,412 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 23:26:06,413 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 23:26:06,414 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 23:26:06,415 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 23:26:06,415 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 23:26:06,415 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 23:26:06,416 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 23:26:06,416 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 23:26:06,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 23:26:06,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 23:26:06,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 23:26:06,419 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 23:26:06,451 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 23:26:06,451 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 23:26:06,451 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 23:26:06,452 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 23:26:06,452 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 23:26:06,452 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 23:26:06,453 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 23:26:06,453 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 23:26:06,454 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 23:26:06,454 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 23:26:06,455 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 23:26:06,455 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 23:26:06,455 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 23:26:06,455 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 23:26:06,455 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 23:26:06,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 23:26:06,456 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 23:26:06,456 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 23:26:06,456 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 23:26:06,456 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 23:26:06,456 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 23:26:06,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 23:26:06,457 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 23:26:06,457 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 23:26:06,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 23:26:06,457 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 23:26:06,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 23:26:06,458 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 23:26:06,458 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 23:26:06,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 23:26:06,458 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 23:26:06,458 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 23:26:06,459 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 23:26:06,459 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 23:26:06,459 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 23:26:06,459 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> abddf9ff39262b7e56b56d5272c2d316261bfefbe98fc5849d87d962ab5f7694 [2023-02-14 23:26:06,697 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 23:26:06,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 23:26:06,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 23:26:06,724 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 23:26:06,724 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 23:26:06,725 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-simple/deep-nested.c [2023-02-14 23:26:07,842 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 23:26:07,980 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 23:26:07,981 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/deep-nested.c [2023-02-14 23:26:07,985 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3f6e447f/ff67a383de864710b5fc2c1fa29c5faa/FLAG2a38007cb [2023-02-14 23:26:07,997 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3f6e447f/ff67a383de864710b5fc2c1fa29c5faa [2023-02-14 23:26:07,999 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 23:26:08,000 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 23:26:08,001 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 23:26:08,001 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 23:26:08,004 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 23:26:08,005 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:26:07" (1/1) ... [2023-02-14 23:26:08,005 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c30d2f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:26:08, skipping insertion in model container [2023-02-14 23:26:08,006 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:26:07" (1/1) ... [2023-02-14 23:26:08,030 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 23:26:08,045 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 23:26:08,222 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/loop-simple/deep-nested.c[625,638] [2023-02-14 23:26:08,228 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 23:26:08,236 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 23:26:08,259 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/loop-simple/deep-nested.c[625,638] [2023-02-14 23:26:08,264 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 23:26:08,275 INFO L208 MainTranslator]: Completed translation [2023-02-14 23:26:08,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:26:08 WrapperNode [2023-02-14 23:26:08,276 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 23:26:08,277 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 23:26:08,277 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 23:26:08,277 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 23:26:08,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:26:08" (1/1) ... [2023-02-14 23:26:08,288 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:26:08" (1/1) ... [2023-02-14 23:26:08,305 INFO L138 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 61 [2023-02-14 23:26:08,305 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 23:26:08,306 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 23:26:08,306 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 23:26:08,306 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 23:26:08,313 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:26:08" (1/1) ... [2023-02-14 23:26:08,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:26:08" (1/1) ... [2023-02-14 23:26:08,322 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:26:08" (1/1) ... [2023-02-14 23:26:08,323 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:26:08" (1/1) ... [2023-02-14 23:26:08,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:26:08" (1/1) ... [2023-02-14 23:26:08,335 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:26:08" (1/1) ... [2023-02-14 23:26:08,337 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:26:08" (1/1) ... [2023-02-14 23:26:08,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:26:08" (1/1) ... [2023-02-14 23:26:08,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 23:26:08,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 23:26:08,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 23:26:08,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 23:26:08,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:26:08" (1/1) ... [2023-02-14 23:26:08,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 23:26:08,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:26:08,370 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-14 23:26:08,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-14 23:26:08,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 23:26:08,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 23:26:08,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 23:26:08,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 23:26:08,451 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 23:26:08,452 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 23:26:08,599 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 23:26:08,604 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 23:26:08,617 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2023-02-14 23:26:08,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:26:08 BoogieIcfgContainer [2023-02-14 23:26:08,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 23:26:08,621 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 23:26:08,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 23:26:08,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 23:26:08,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 11:26:07" (1/3) ... [2023-02-14 23:26:08,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c238e75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:26:08, skipping insertion in model container [2023-02-14 23:26:08,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:26:08" (2/3) ... [2023-02-14 23:26:08,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c238e75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:26:08, skipping insertion in model container [2023-02-14 23:26:08,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:26:08" (3/3) ... [2023-02-14 23:26:08,626 INFO L112 eAbstractionObserver]: Analyzing ICFG deep-nested.c [2023-02-14 23:26:08,640 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 23:26:08,657 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 23:26:08,719 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 23:26:08,727 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;@28475f7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 23:26:08,739 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 23:26:08,742 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:26:08,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-14 23:26:08,747 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:26:08,747 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:26:08,748 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:26:08,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:26:08,752 INFO L85 PathProgramCache]: Analyzing trace with hash -180366952, now seen corresponding path program 1 times [2023-02-14 23:26:08,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:26:08,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184060028] [2023-02-14 23:26:08,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:26:08,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:26:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:26:09,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 23:26:09,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:26:09,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184060028] [2023-02-14 23:26:09,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184060028] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 23:26:09,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 23:26:09,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 23:26:09,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515831959] [2023-02-14 23:26:09,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:26:09,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 23:26:09,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:26:09,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 23:26:09,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 23:26:09,097 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:26:09,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:26:09,193 INFO L93 Difference]: Finished difference Result 39 states and 62 transitions. [2023-02-14 23:26:09,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 23:26:09,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2023-02-14 23:26:09,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:26:09,202 INFO L225 Difference]: With dead ends: 39 [2023-02-14 23:26:09,203 INFO L226 Difference]: Without dead ends: 18 [2023-02-14 23:26:09,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 23:26:09,209 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:26:09,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 20 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:26:09,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-02-14 23:26:09,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2023-02-14 23:26:09,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:26:09,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-02-14 23:26:09,243 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2023-02-14 23:26:09,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:26:09,244 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-02-14 23:26:09,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:26:09,245 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-02-14 23:26:09,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-14 23:26:09,246 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:26:09,246 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:26:09,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 23:26:09,246 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:26:09,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:26:09,248 INFO L85 PathProgramCache]: Analyzing trace with hash -303894894, now seen corresponding path program 1 times [2023-02-14 23:26:09,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:26:09,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136990065] [2023-02-14 23:26:09,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:26:09,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:26:09,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:26:09,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 23:26:09,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:26:09,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136990065] [2023-02-14 23:26:09,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136990065] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 23:26:09,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 23:26:09,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 23:26:09,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490177965] [2023-02-14 23:26:09,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:26:09,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 23:26:09,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:26:09,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 23:26:09,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 23:26:09,652 INFO L87 Difference]: Start difference. First operand 17 states and 21 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) [2023-02-14 23:26:09,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:26:09,689 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2023-02-14 23:26:09,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 23:26:09,689 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 12 [2023-02-14 23:26:09,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:26:09,690 INFO L225 Difference]: With dead ends: 32 [2023-02-14 23:26:09,690 INFO L226 Difference]: Without dead ends: 30 [2023-02-14 23:26:09,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 23:26:09,692 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:26:09,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 14 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:26:09,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-14 23:26:09,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2023-02-14 23:26:09,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:26:09,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2023-02-14 23:26:09,700 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 12 [2023-02-14 23:26:09,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:26:09,701 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2023-02-14 23:26:09,701 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) [2023-02-14 23:26:09,701 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2023-02-14 23:26:09,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-14 23:26:09,702 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:26:09,702 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:26:09,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 23:26:09,702 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:26:09,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:26:09,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1056396073, now seen corresponding path program 1 times [2023-02-14 23:26:09,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:26:09,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876950781] [2023-02-14 23:26:09,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:26:09,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:26:09,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:26:09,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 23:26:09,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:26:09,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876950781] [2023-02-14 23:26:09,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876950781] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:26:09,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259835753] [2023-02-14 23:26:09,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:26:09,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:26:09,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:26:09,946 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:26:09,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 23:26:09,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:26:09,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 23:26:09,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:26:10,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 23:26:10,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 23:26:10,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259835753] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 23:26:10,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 23:26:10,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-02-14 23:26:10,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980946396] [2023-02-14 23:26:10,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:26:10,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 23:26:10,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:26:10,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 23:26:10,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-14 23:26:10,052 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2023-02-14 23:26:10,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:26:10,114 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2023-02-14 23:26:10,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 23:26:10,114 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) Word has length 15 [2023-02-14 23:26:10,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:26:10,115 INFO L225 Difference]: With dead ends: 67 [2023-02-14 23:26:10,115 INFO L226 Difference]: Without dead ends: 52 [2023-02-14 23:26:10,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-02-14 23:26:10,120 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 50 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:26:10,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 18 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:26:10,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-14 23:26:10,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 30. [2023-02-14 23:26:10,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:26:10,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2023-02-14 23:26:10,139 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 15 [2023-02-14 23:26:10,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:26:10,139 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2023-02-14 23:26:10,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2023-02-14 23:26:10,140 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2023-02-14 23:26:10,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-14 23:26:10,140 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:26:10,141 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:26:10,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 23:26:10,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:26:10,347 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:26:10,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:26:10,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1212980556, now seen corresponding path program 1 times [2023-02-14 23:26:10,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:26:10,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907623159] [2023-02-14 23:26:10,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:26:10,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:26:10,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:26:10,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 23:26:10,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:26:10,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907623159] [2023-02-14 23:26:10,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907623159] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:26:10,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836555339] [2023-02-14 23:26:10,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:26:10,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:26:10,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:26:10,552 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) [2023-02-14 23:26:10,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 23:26:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:26:10,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 23:26:10,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:26:10,644 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 23:26:10,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 23:26:10,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836555339] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 23:26:10,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 23:26:10,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-02-14 23:26:10,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410457859] [2023-02-14 23:26:10,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:26:10,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 23:26:10,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:26:10,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 23:26:10,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-14 23:26:10,651 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:26:10,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:26:10,745 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2023-02-14 23:26:10,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 23:26:10,746 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 18 [2023-02-14 23:26:10,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:26:10,747 INFO L225 Difference]: With dead ends: 76 [2023-02-14 23:26:10,747 INFO L226 Difference]: Without dead ends: 50 [2023-02-14 23:26:10,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-02-14 23:26:10,748 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 90 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:26:10,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 16 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:26:10,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-14 23:26:10,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 32. [2023-02-14 23:26:10,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:26:10,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2023-02-14 23:26:10,757 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 18 [2023-02-14 23:26:10,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:26:10,758 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2023-02-14 23:26:10,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:26:10,758 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2023-02-14 23:26:10,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-14 23:26:10,759 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:26:10,759 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:26:10,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 23:26:10,963 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,SelfDestructingSolverStorable3 [2023-02-14 23:26:10,964 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:26:10,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:26:10,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1901462963, now seen corresponding path program 1 times [2023-02-14 23:26:10,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:26:10,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559871605] [2023-02-14 23:26:10,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:26:10,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:26:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:26:11,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 23:26:11,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:26:11,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559871605] [2023-02-14 23:26:11,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559871605] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:26:11,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20589483] [2023-02-14 23:26:11,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:26:11,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:26:11,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:26:11,162 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) [2023-02-14 23:26:11,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 23:26:11,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:26:11,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 23:26:11,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:26:11,235 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 23:26:11,236 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 23:26:11,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20589483] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 23:26:11,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 23:26:11,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-02-14 23:26:11,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240279508] [2023-02-14 23:26:11,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:26:11,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 23:26:11,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:26:11,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 23:26:11,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-14 23:26:11,238 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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) [2023-02-14 23:26:11,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:26:11,306 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2023-02-14 23:26:11,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 23:26:11,307 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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) Word has length 21 [2023-02-14 23:26:11,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:26:11,307 INFO L225 Difference]: With dead ends: 76 [2023-02-14 23:26:11,307 INFO L226 Difference]: Without dead ends: 48 [2023-02-14 23:26:11,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-02-14 23:26:11,308 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 61 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:26:11,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 17 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:26:11,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-14 23:26:11,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2023-02-14 23:26:11,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:26:11,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2023-02-14 23:26:11,323 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 21 [2023-02-14 23:26:11,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:26:11,324 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2023-02-14 23:26:11,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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) [2023-02-14 23:26:11,324 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2023-02-14 23:26:11,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-14 23:26:11,325 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:26:11,325 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:26:11,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-14 23:26:11,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:26:11,530 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:26:11,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:26:11,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1208008852, now seen corresponding path program 1 times [2023-02-14 23:26:11,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:26:11,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066048098] [2023-02-14 23:26:11,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:26:11,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:26:11,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:26:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 23:26:11,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:26:11,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066048098] [2023-02-14 23:26:11,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066048098] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:26:11,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805102425] [2023-02-14 23:26:11,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:26:11,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:26:11,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:26:11,720 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) [2023-02-14 23:26:11,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 23:26:11,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:26:11,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-14 23:26:11,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:26:11,866 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 23:26:11,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:26:12,006 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 23:26:12,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805102425] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:26:12,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:26:12,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-02-14 23:26:12,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743375480] [2023-02-14 23:26:12,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:26:12,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-14 23:26:12,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:26:12,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-14 23:26:12,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-02-14 23:26:12,011 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:26:13,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:26:13,473 INFO L93 Difference]: Finished difference Result 186 states and 243 transitions. [2023-02-14 23:26:13,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-14 23:26:13,474 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-14 23:26:13,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:26:13,475 INFO L225 Difference]: With dead ends: 186 [2023-02-14 23:26:13,475 INFO L226 Difference]: Without dead ends: 111 [2023-02-14 23:26:13,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=509, Invalid=1843, Unknown=0, NotChecked=0, Total=2352 [2023-02-14 23:26:13,477 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 436 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 23:26:13,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 64 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 23:26:13,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-02-14 23:26:13,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2023-02-14 23:26:13,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 70 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:26:13,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2023-02-14 23:26:13,503 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 27 [2023-02-14 23:26:13,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:26:13,503 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2023-02-14 23:26:13,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:26:13,503 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2023-02-14 23:26:13,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-14 23:26:13,504 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:26:13,505 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-14 23:26:13,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 23:26:13,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:26:13,709 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:26:13,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:26:13,710 INFO L85 PathProgramCache]: Analyzing trace with hash -971666175, now seen corresponding path program 2 times [2023-02-14 23:26:13,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:26:13,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623189968] [2023-02-14 23:26:13,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:26:13,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:26:13,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:26:14,013 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-14 23:26:14,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:26:14,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623189968] [2023-02-14 23:26:14,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623189968] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:26:14,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608342014] [2023-02-14 23:26:14,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 23:26:14,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:26:14,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:26:14,016 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) [2023-02-14 23:26:14,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 23:26:14,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-14 23:26:14,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:26:14,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-14 23:26:14,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:26:14,159 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-02-14 23:26:14,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 23:26:14,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608342014] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 23:26:14,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 23:26:14,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2023-02-14 23:26:14,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589589115] [2023-02-14 23:26:14,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:26:14,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 23:26:14,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:26:14,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 23:26:14,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-02-14 23:26:14,162 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:26:14,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:26:14,200 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2023-02-14 23:26:14,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 23:26:14,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2023-02-14 23:26:14,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:26:14,204 INFO L225 Difference]: With dead ends: 73 [2023-02-14 23:26:14,204 INFO L226 Difference]: Without dead ends: 71 [2023-02-14 23:26:14,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-02-14 23:26:14,205 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:26:14,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 14 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:26:14,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-02-14 23:26:14,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2023-02-14 23:26:14,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 69 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:26:14,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2023-02-14 23:26:14,239 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 48 [2023-02-14 23:26:14,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:26:14,240 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2023-02-14 23:26:14,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:26:14,240 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2023-02-14 23:26:14,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-14 23:26:14,245 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:26:14,245 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2023-02-14 23:26:14,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-14 23:26:14,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:26:14,449 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:26:14,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:26:14,450 INFO L85 PathProgramCache]: Analyzing trace with hash -414140084, now seen corresponding path program 3 times [2023-02-14 23:26:14,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:26:14,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610094957] [2023-02-14 23:26:14,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:26:14,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:26:14,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:26:14,770 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 17 proven. 64 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2023-02-14 23:26:14,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:26:14,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610094957] [2023-02-14 23:26:14,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610094957] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:26:14,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232189611] [2023-02-14 23:26:14,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 23:26:14,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:26:14,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:26:14,772 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) [2023-02-14 23:26:14,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 23:26:14,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-02-14 23:26:14,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:26:14,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-14 23:26:14,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:26:14,962 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2023-02-14 23:26:14,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 23:26:14,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232189611] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 23:26:14,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 23:26:14,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2023-02-14 23:26:14,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264189364] [2023-02-14 23:26:14,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:26:14,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 23:26:14,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:26:14,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 23:26:14,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-02-14 23:26:14,964 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:26:15,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:26:15,007 INFO L93 Difference]: Finished difference Result 117 states and 139 transitions. [2023-02-14 23:26:15,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 23:26:15,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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 63 [2023-02-14 23:26:15,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:26:15,008 INFO L225 Difference]: With dead ends: 117 [2023-02-14 23:26:15,008 INFO L226 Difference]: Without dead ends: 115 [2023-02-14 23:26:15,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-02-14 23:26:15,009 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:26:15,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 13 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:26:15,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-02-14 23:26:15,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2023-02-14 23:26:15,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 79 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:26:15,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2023-02-14 23:26:15,043 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 63 [2023-02-14 23:26:15,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:26:15,043 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2023-02-14 23:26:15,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:26:15,044 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2023-02-14 23:26:15,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-14 23:26:15,044 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:26:15,045 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2023-02-14 23:26:15,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 23:26:15,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:26:15,250 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:26:15,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:26:15,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1648728410, now seen corresponding path program 4 times [2023-02-14 23:26:15,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:26:15,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365601209] [2023-02-14 23:26:15,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:26:15,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:26:15,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:26:15,604 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 20 proven. 83 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2023-02-14 23:26:15,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:26:15,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365601209] [2023-02-14 23:26:15,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365601209] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:26:15,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119185755] [2023-02-14 23:26:15,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 23:26:15,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:26:15,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:26:15,609 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:26:15,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 23:26:15,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 23:26:15,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:26:15,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 23:26:15,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:26:15,862 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 88 proven. 71 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-02-14 23:26:15,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:26:16,065 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 30 proven. 129 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-02-14 23:26:16,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119185755] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:26:16,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:26:16,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2023-02-14 23:26:16,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115184658] [2023-02-14 23:26:16,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:26:16,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-14 23:26:16,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:26:16,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-14 23:26:16,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2023-02-14 23:26:16,067 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand has 21 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 21 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:26:16,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:26:16,529 INFO L93 Difference]: Finished difference Result 251 states and 317 transitions. [2023-02-14 23:26:16,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 23:26:16,529 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 21 states have internal predecessors, (83), 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 75 [2023-02-14 23:26:16,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:26:16,530 INFO L225 Difference]: With dead ends: 251 [2023-02-14 23:26:16,530 INFO L226 Difference]: Without dead ends: 120 [2023-02-14 23:26:16,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2023-02-14 23:26:16,531 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 83 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 23:26:16,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 75 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 23:26:16,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-02-14 23:26:16,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 110. [2023-02-14 23:26:16,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.1559633027522935) internal successors, (126), 109 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:26:16,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2023-02-14 23:26:16,563 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 75 [2023-02-14 23:26:16,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:26:16,563 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2023-02-14 23:26:16,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 21 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:26:16,563 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2023-02-14 23:26:16,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-02-14 23:26:16,564 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:26:16,565 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2023-02-14 23:26:16,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 23:26:16,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:26:16,770 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:26:16,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:26:16,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1372721946, now seen corresponding path program 5 times [2023-02-14 23:26:16,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:26:16,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830220448] [2023-02-14 23:26:16,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:26:16,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:26:16,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:26:17,324 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 20 proven. 270 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2023-02-14 23:26:17,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:26:17,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830220448] [2023-02-14 23:26:17,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830220448] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:26:17,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337467285] [2023-02-14 23:26:17,324 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 23:26:17,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:26:17,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:26:17,329 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:26:17,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 23:26:18,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-02-14 23:26:18,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:26:18,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-14 23:26:18,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:26:18,389 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 438 proven. 84 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2023-02-14 23:26:18,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:26:18,547 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 420 proven. 102 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2023-02-14 23:26:18,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337467285] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:26:18,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:26:18,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 19 [2023-02-14 23:26:18,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602891680] [2023-02-14 23:26:18,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:26:18,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-14 23:26:18,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:26:18,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-14 23:26:18,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2023-02-14 23:26:18,550 INFO L87 Difference]: Start difference. First operand 110 states and 126 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:26:19,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:26:19,676 INFO L93 Difference]: Finished difference Result 514 states and 609 transitions. [2023-02-14 23:26:19,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-14 23:26:19,677 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 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 105 [2023-02-14 23:26:19,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:26:19,680 INFO L225 Difference]: With dead ends: 514 [2023-02-14 23:26:19,680 INFO L226 Difference]: Without dead ends: 330 [2023-02-14 23:26:19,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=308, Invalid=1584, Unknown=0, NotChecked=0, Total=1892 [2023-02-14 23:26:19,684 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 186 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 23:26:19,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 65 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 23:26:19,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2023-02-14 23:26:19,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 231. [2023-02-14 23:26:19,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.1) internal successors, (253), 230 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:26:19,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 253 transitions. [2023-02-14 23:26:19,734 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 253 transitions. Word has length 105 [2023-02-14 23:26:19,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:26:19,735 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 253 transitions. [2023-02-14 23:26:19,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:26:19,735 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 253 transitions. [2023-02-14 23:26:19,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2023-02-14 23:26:19,737 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:26:19,737 INFO L195 NwaCegarLoop]: trace histogram [56, 55, 55, 11, 10, 10, 5, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2023-02-14 23:26:19,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 23:26:19,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-14 23:26:19,943 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:26:19,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:26:19,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1843530466, now seen corresponding path program 6 times [2023-02-14 23:26:19,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:26:19,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718991074] [2023-02-14 23:26:19,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:26:19,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:26:20,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:26:20,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5368 backedges. 26 proven. 950 refuted. 0 times theorem prover too weak. 4392 trivial. 0 not checked. [2023-02-14 23:26:20,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:26:20,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718991074] [2023-02-14 23:26:20,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718991074] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:26:20,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146140923] [2023-02-14 23:26:20,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 23:26:20,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:26:20,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:26:20,976 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:26:20,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 23:26:21,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-02-14 23:26:21,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:26:21,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 23:26:21,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:26:21,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5368 backedges. 2534 proven. 902 refuted. 0 times theorem prover too weak. 1932 trivial. 0 not checked. [2023-02-14 23:26:21,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:26:21,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5368 backedges. 0 proven. 3436 refuted. 0 times theorem prover too weak. 1932 trivial. 0 not checked. [2023-02-14 23:26:21,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146140923] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:26:21,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:26:21,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 17 [2023-02-14 23:26:21,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365615710] [2023-02-14 23:26:21,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:26:21,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-14 23:26:21,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:26:21,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-14 23:26:21,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-02-14 23:26:21,908 INFO L87 Difference]: Start difference. First operand 231 states and 253 transitions. Second operand has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:26:23,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:26:23,373 INFO L93 Difference]: Finished difference Result 1121 states and 1280 transitions. [2023-02-14 23:26:23,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-14 23:26:23,373 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 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 228 [2023-02-14 23:26:23,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:26:23,377 INFO L225 Difference]: With dead ends: 1121 [2023-02-14 23:26:23,377 INFO L226 Difference]: Without dead ends: 895 [2023-02-14 23:26:23,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=705, Invalid=2265, Unknown=0, NotChecked=0, Total=2970 [2023-02-14 23:26:23,379 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 96 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 23:26:23,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 54 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 23:26:23,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2023-02-14 23:26:23,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 457. [2023-02-14 23:26:23,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.081140350877193) internal successors, (493), 456 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:26:23,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 493 transitions. [2023-02-14 23:26:23,456 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 493 transitions. Word has length 228 [2023-02-14 23:26:23,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:26:23,457 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 493 transitions. [2023-02-14 23:26:23,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:26:23,457 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 493 transitions. [2023-02-14 23:26:23,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2023-02-14 23:26:23,463 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:26:23,463 INFO L195 NwaCegarLoop]: trace histogram [120, 119, 119, 17, 16, 16, 8, 7, 7, 7, 6, 6, 2, 1, 1, 1, 1, 1, 1] [2023-02-14 23:26:23,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 23:26:23,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:26:23,670 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:26:23,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:26:23,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1421354286, now seen corresponding path program 7 times [2023-02-14 23:26:23,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:26:23,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711990384] [2023-02-14 23:26:23,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:26:23,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:26:24,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:26:25,891 INFO L134 CoverageAnalysis]: Checked inductivity of 23893 backedges. 44 proven. 2781 refuted. 0 times theorem prover too weak. 21068 trivial. 0 not checked. [2023-02-14 23:26:25,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:26:25,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711990384] [2023-02-14 23:26:25,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711990384] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:26:25,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695807862] [2023-02-14 23:26:25,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 23:26:25,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:26:25,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:26:25,897 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:26:25,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 23:26:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:26:26,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 23:26:26,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:26:26,335 INFO L134 CoverageAnalysis]: Checked inductivity of 23893 backedges. 4986 proven. 206 refuted. 0 times theorem prover too weak. 18701 trivial. 0 not checked. [2023-02-14 23:26:26,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:26:26,572 INFO L134 CoverageAnalysis]: Checked inductivity of 23893 backedges. 4986 proven. 206 refuted. 0 times theorem prover too weak. 18701 trivial. 0 not checked. [2023-02-14 23:26:26,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695807862] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:26:26,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:26:26,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 27 [2023-02-14 23:26:26,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991848967] [2023-02-14 23:26:26,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:26:26,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-14 23:26:26,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:26:26,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-14 23:26:26,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2023-02-14 23:26:26,575 INFO L87 Difference]: Start difference. First operand 457 states and 493 transitions. Second operand has 27 states, 27 states have (on average 3.962962962962963) internal successors, (107), 27 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:26:32,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:26:32,643 INFO L93 Difference]: Finished difference Result 2182 states and 2489 transitions. [2023-02-14 23:26:32,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-02-14 23:26:32,644 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.962962962962963) internal successors, (107), 27 states have internal predecessors, (107), 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 456 [2023-02-14 23:26:32,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:26:32,650 INFO L225 Difference]: With dead ends: 2182 [2023-02-14 23:26:32,650 INFO L226 Difference]: Without dead ends: 1730 [2023-02-14 23:26:32,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 999 GetRequests, 899 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3302 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1583, Invalid=8719, Unknown=0, NotChecked=0, Total=10302 [2023-02-14 23:26:32,654 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 425 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:26:32,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 84 Invalid, 1260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-14 23:26:32,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2023-02-14 23:26:32,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1563. [2023-02-14 23:26:32,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1563 states, 1562 states have (on average 1.0435339308578746) internal successors, (1630), 1562 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:26:32,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 1630 transitions. [2023-02-14 23:26:32,951 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 1630 transitions. Word has length 456 [2023-02-14 23:26:32,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:26:32,952 INFO L495 AbstractCegarLoop]: Abstraction has 1563 states and 1630 transitions. [2023-02-14 23:26:32,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.962962962962963) internal successors, (107), 27 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:26:32,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 1630 transitions. [2023-02-14 23:26:32,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1561 [2023-02-14 23:26:32,993 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:26:32,994 INFO L195 NwaCegarLoop]: trace histogram [457, 456, 456, 48, 47, 47, 8, 7, 7, 7, 6, 6, 2, 1, 1, 1, 1, 1, 1] [2023-02-14 23:26:33,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 23:26:33,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-14 23:26:33,200 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:26:33,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:26:33,201 INFO L85 PathProgramCache]: Analyzing trace with hash -175132519, now seen corresponding path program 8 times [2023-02-14 23:26:33,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:26:33,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952492516] [2023-02-14 23:26:33,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:26:33,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:26:36,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:26:41,896 INFO L134 CoverageAnalysis]: Checked inductivity of 337414 backedges. 75 proven. 14944 refuted. 0 times theorem prover too weak. 322395 trivial. 0 not checked. [2023-02-14 23:26:41,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:26:41,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952492516] [2023-02-14 23:26:41,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952492516] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:26:41,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210161217] [2023-02-14 23:26:41,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 23:26:41,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:26:41,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:26:41,900 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:26:41,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 23:26:42,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 23:26:42,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:26:42,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 2243 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-14 23:26:42,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:26:43,045 INFO L134 CoverageAnalysis]: Checked inductivity of 337414 backedges. 53384 proven. 1076 refuted. 0 times theorem prover too weak. 282954 trivial. 0 not checked. [2023-02-14 23:26:43,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:26:43,902 INFO L134 CoverageAnalysis]: Checked inductivity of 337414 backedges. 52748 proven. 1712 refuted. 0 times theorem prover too weak. 282954 trivial. 0 not checked. [2023-02-14 23:26:43,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210161217] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:26:43,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:26:43,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23, 23] total 57 [2023-02-14 23:26:43,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302837564] [2023-02-14 23:26:43,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:26:43,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-02-14 23:26:43,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:26:43,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-02-14 23:26:43,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=2818, Unknown=0, NotChecked=0, Total=3192 [2023-02-14 23:26:43,908 INFO L87 Difference]: Start difference. First operand 1563 states and 1630 transitions. Second operand has 57 states, 57 states have (on average 3.456140350877193) internal successors, (197), 57 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:27:35,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:27:35,649 INFO L93 Difference]: Finished difference Result 4921 states and 5667 transitions. [2023-02-14 23:27:35,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-14 23:27:35,649 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.456140350877193) internal successors, (197), 57 states have internal predecessors, (197), 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 1560 [2023-02-14 23:27:35,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:27:35,660 INFO L225 Difference]: With dead ends: 4921 [2023-02-14 23:27:35,660 INFO L226 Difference]: Without dead ends: 3363 [2023-02-14 23:27:35,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3162 GetRequests, 3081 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1535 ImplicationChecksByTransitivity, 48.9s TimeCoverageRelationStatistics Valid=990, Invalid=5814, Unknown=2, NotChecked=0, Total=6806 [2023-02-14 23:27:35,667 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 240 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-02-14 23:27:35,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 123 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-02-14 23:27:35,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3363 states. [2023-02-14 23:27:36,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3363 to 3362. [2023-02-14 23:27:36,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3362 states, 3361 states have (on average 1.0202320737875632) internal successors, (3429), 3361 states have internal predecessors, (3429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:27:36,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3362 states to 3362 states and 3429 transitions. [2023-02-14 23:27:36,248 INFO L78 Accepts]: Start accepts. Automaton has 3362 states and 3429 transitions. Word has length 1560 [2023-02-14 23:27:36,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:27:36,251 INFO L495 AbstractCegarLoop]: Abstraction has 3362 states and 3429 transitions. [2023-02-14 23:27:36,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.456140350877193) internal successors, (197), 57 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:27:36,251 INFO L276 IsEmpty]: Start isEmpty. Operand 3362 states and 3429 transitions. [2023-02-14 23:27:36,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3358 [2023-02-14 23:27:36,317 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:27:36,318 INFO L195 NwaCegarLoop]: trace histogram [1056, 1055, 1055, 48, 47, 47, 8, 7, 7, 7, 6, 6, 2, 1, 1, 1, 1, 1, 1] [2023-02-14 23:27:36,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-14 23:27:36,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-14 23:27:36,556 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:27:36,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:27:36,557 INFO L85 PathProgramCache]: Analyzing trace with hash -320132413, now seen corresponding path program 9 times [2023-02-14 23:27:36,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:27:36,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021606759] [2023-02-14 23:27:36,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:27:36,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:27:44,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:27:58,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1723500 backedges. 75 proven. 72062 refuted. 0 times theorem prover too weak. 1651363 trivial. 0 not checked. [2023-02-14 23:27:58,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:27:58,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021606759] [2023-02-14 23:27:58,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021606759] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:27:58,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399778286] [2023-02-14 23:27:58,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 23:27:58,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:27:58,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:27:58,940 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:27:58,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 23:27:59,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-14 23:27:59,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:27:59,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-14 23:27:59,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:28:11,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1723500 backedges. 0 proven. 647232 refuted. 0 times theorem prover too weak. 1076268 trivial. 0 not checked. [2023-02-14 23:28:11,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:28:18,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1723500 backedges. 0 proven. 647232 refuted. 0 times theorem prover too weak. 1076268 trivial. 0 not checked. [2023-02-14 23:28:18,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399778286] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:28:18,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:28:18,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 4, 4] total 32 [2023-02-14 23:28:18,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452505230] [2023-02-14 23:28:18,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:28:18,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-14 23:28:18,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:28:18,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-14 23:28:18,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2023-02-14 23:28:18,946 INFO L87 Difference]: Start difference. First operand 3362 states and 3429 transitions. Second operand has 32 states, 32 states have (on average 4.71875) internal successors, (151), 32 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:28:28,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:28:28,551 INFO L93 Difference]: Finished difference Result 15467 states and 16009 transitions. [2023-02-14 23:28:28,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2023-02-14 23:28:28,551 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.71875) internal successors, (151), 32 states have internal predecessors, (151), 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 3357 [2023-02-14 23:28:28,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:28:28,591 INFO L225 Difference]: With dead ends: 15467 [2023-02-14 23:28:28,592 INFO L226 Difference]: Without dead ends: 11835 [2023-02-14 23:28:28,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6864 GetRequests, 6711 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7748 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1870, Invalid=22000, Unknown=0, NotChecked=0, Total=23870 [2023-02-14 23:28:28,607 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 347 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 3613 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 3747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 3613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-02-14 23:28:28,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 132 Invalid, 3747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 3613 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-02-14 23:28:28,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11835 states. [2023-02-14 23:28:29,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11835 to 6216. [2023-02-14 23:28:29,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6216 states, 6215 states have (on average 1.019147224456959) internal successors, (6334), 6215 states have internal predecessors, (6334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:28:29,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6216 states to 6216 states and 6334 transitions. [2023-02-14 23:28:29,830 INFO L78 Accepts]: Start accepts. Automaton has 6216 states and 6334 transitions. Word has length 3357 [2023-02-14 23:28:29,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:28:29,831 INFO L495 AbstractCegarLoop]: Abstraction has 6216 states and 6334 transitions. [2023-02-14 23:28:29,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.71875) internal successors, (151), 32 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 23:28:29,831 INFO L276 IsEmpty]: Start isEmpty. Operand 6216 states and 6334 transitions. [2023-02-14 23:28:30,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6214 [2023-02-14 23:28:30,023 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:28:30,025 INFO L195 NwaCegarLoop]: trace histogram [1957, 1956, 1956, 84, 83, 83, 14, 13, 13, 13, 12, 12, 5, 4, 4, 1, 1, 1, 1] [2023-02-14 23:28:30,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-02-14 23:28:30,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-14 23:28:30,225 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:28:30,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:28:30,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1772466518, now seen corresponding path program 10 times [2023-02-14 23:28:30,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:28:30,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794143532] [2023-02-14 23:28:30,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:28:30,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:29:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:29:33,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5914396 backedges. 141 proven. 145919 refuted. 0 times theorem prover too weak. 5768336 trivial. 0 not checked. [2023-02-14 23:29:33,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:29:33,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794143532] [2023-02-14 23:29:33,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794143532] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:29:33,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135601363] [2023-02-14 23:29:33,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 23:29:33,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:29:33,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:29:33,825 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:29:33,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-14 23:29:35,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 23:29:35,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:29:35,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 8549 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-14 23:29:35,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:29:43,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5914396 backedges. 2935886 proven. 51572 refuted. 0 times theorem prover too weak. 2926938 trivial. 0 not checked. [2023-02-14 23:29:43,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:29:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5914396 backedges. 2398296 proven. 589162 refuted. 0 times theorem prover too weak. 2926938 trivial. 0 not checked. [2023-02-14 23:29:50,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135601363] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:29:50,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 23:29:50,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 17, 17] total 59 [2023-02-14 23:29:50,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674115316] [2023-02-14 23:29:50,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 23:29:50,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-02-14 23:29:50,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:29:50,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-02-14 23:29:50,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=3046, Unknown=0, NotChecked=0, Total=3422 [2023-02-14 23:29:50,347 INFO L87 Difference]: Start difference. First operand 6216 states and 6334 transitions. Second operand has 59 states, 59 states have (on average 4.1525423728813555) internal successors, (245), 59 states have internal predecessors, (245), 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)