./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/heapsort.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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-invgen/heapsort.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8e7c8e5dc2a9e8f11b25d1bb9948f05f37b9553e3dc9f8bd8213088dea43cb37 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 10:01:18,425 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 10:01:18,426 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 10:01:18,465 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 10:01:18,465 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 10:01:18,469 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 10:01:18,470 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 10:01:18,476 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 10:01:18,477 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 10:01:18,480 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 10:01:18,481 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 10:01:18,482 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 10:01:18,482 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 10:01:18,487 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 10:01:18,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 10:01:18,491 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 10:01:18,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 10:01:18,496 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 10:01:18,497 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 10:01:18,500 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 10:01:18,504 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 10:01:18,505 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 10:01:18,506 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 10:01:18,507 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 10:01:18,509 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 10:01:18,510 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 10:01:18,511 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 10:01:18,512 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 10:01:18,513 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 10:01:18,513 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 10:01:18,514 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 10:01:18,515 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 10:01:18,516 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 10:01:18,517 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 10:01:18,517 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 10:01:18,518 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 10:01:18,518 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 10:01:18,518 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 10:01:18,518 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 10:01:18,519 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 10:01:18,519 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 10:01:18,522 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 10:01:18,557 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 10:01:18,557 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 10:01:18,558 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 10:01:18,558 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 10:01:18,559 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 10:01:18,559 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 10:01:18,560 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 10:01:18,560 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 10:01:18,560 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 10:01:18,560 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 10:01:18,561 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 10:01:18,561 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 10:01:18,561 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 10:01:18,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 10:01:18,562 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 10:01:18,562 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 10:01:18,562 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 10:01:18,562 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 10:01:18,563 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 10:01:18,563 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 10:01:18,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 10:01:18,563 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 10:01:18,563 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 10:01:18,563 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 10:01:18,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 10:01:18,564 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 10:01:18,564 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 10:01:18,564 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 10:01:18,564 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 10:01:18,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 10:01:18,565 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 10:01:18,565 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 10:01:18,565 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 10:01:18,565 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 10:01:18,566 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e7c8e5dc2a9e8f11b25d1bb9948f05f37b9553e3dc9f8bd8213088dea43cb37 [2021-12-17 10:01:18,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 10:01:18,827 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 10:01:18,830 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 10:01:18,831 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 10:01:18,832 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 10:01:18,833 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/heapsort.i [2021-12-17 10:01:18,884 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36ae90536/95d7a8a68e424bc5a6c98d8ef9620a4a/FLAG3160485bd [2021-12-17 10:01:19,307 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 10:01:19,310 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/heapsort.i [2021-12-17 10:01:19,320 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36ae90536/95d7a8a68e424bc5a6c98d8ef9620a4a/FLAG3160485bd [2021-12-17 10:01:19,336 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36ae90536/95d7a8a68e424bc5a6c98d8ef9620a4a [2021-12-17 10:01:19,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 10:01:19,340 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 10:01:19,341 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 10:01:19,341 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 10:01:19,344 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 10:01:19,344 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 10:01:19" (1/1) ... [2021-12-17 10:01:19,346 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@322b0c58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:01:19, skipping insertion in model container [2021-12-17 10:01:19,346 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 10:01:19" (1/1) ... [2021-12-17 10:01:19,351 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 10:01:19,367 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 10:01:19,484 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/heapsort.i[893,906] [2021-12-17 10:01:19,497 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 10:01:19,504 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 10:01:19,514 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/heapsort.i[893,906] [2021-12-17 10:01:19,521 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 10:01:19,532 INFO L208 MainTranslator]: Completed translation [2021-12-17 10:01:19,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:01:19 WrapperNode [2021-12-17 10:01:19,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 10:01:19,534 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 10:01:19,534 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 10:01:19,534 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 10:01:19,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:01:19" (1/1) ... [2021-12-17 10:01:19,545 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:01:19" (1/1) ... [2021-12-17 10:01:19,561 INFO L137 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2021-12-17 10:01:19,561 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 10:01:19,562 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 10:01:19,562 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 10:01:19,563 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 10:01:19,569 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:01:19" (1/1) ... [2021-12-17 10:01:19,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:01:19" (1/1) ... [2021-12-17 10:01:19,571 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:01:19" (1/1) ... [2021-12-17 10:01:19,571 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:01:19" (1/1) ... [2021-12-17 10:01:19,574 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:01:19" (1/1) ... [2021-12-17 10:01:19,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:01:19" (1/1) ... [2021-12-17 10:01:19,578 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:01:19" (1/1) ... [2021-12-17 10:01:19,579 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 10:01:19,580 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 10:01:19,580 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 10:01:19,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 10:01:19,581 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:01:19" (1/1) ... [2021-12-17 10:01:19,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 10:01:19,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:01:19,612 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 10:01:19,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 10:01:19,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 10:01:19,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 10:01:19,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 10:01:19,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 10:01:19,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 10:01:19,645 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 10:01:19,692 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 10:01:19,693 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 10:01:19,833 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 10:01:19,839 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 10:01:19,839 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 10:01:19,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:01:19 BoogieIcfgContainer [2021-12-17 10:01:19,841 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 10:01:19,843 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 10:01:19,843 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 10:01:19,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 10:01:19,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 10:01:19" (1/3) ... [2021-12-17 10:01:19,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c0147dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 10:01:19, skipping insertion in model container [2021-12-17 10:01:19,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:01:19" (2/3) ... [2021-12-17 10:01:19,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c0147dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 10:01:19, skipping insertion in model container [2021-12-17 10:01:19,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:01:19" (3/3) ... [2021-12-17 10:01:19,848 INFO L111 eAbstractionObserver]: Analyzing ICFG heapsort.i [2021-12-17 10:01:19,852 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 10:01:19,852 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 10:01:19,892 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 10:01:19,897 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 10:01:19,898 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 10:01:19,910 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-17 10:01:19,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-17 10:01:19,914 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:01:19,914 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:01:19,915 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:01:19,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:01:19,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1754201352, now seen corresponding path program 1 times [2021-12-17 10:01:19,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:01:19,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295909414] [2021-12-17 10:01:19,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:01:19,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:01:20,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:20,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:01:20,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:01:20,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295909414] [2021-12-17 10:01:20,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295909414] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 10:01:20,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 10:01:20,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 10:01:20,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549892635] [2021-12-17 10:01:20,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 10:01:20,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 10:01:20,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:01:20,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 10:01:20,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 10:01:20,157 INFO L87 Difference]: Start difference. First operand has 39 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:01:20,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:01:20,337 INFO L93 Difference]: Finished difference Result 104 states and 193 transitions. [2021-12-17 10:01:20,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 10:01:20,340 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-17 10:01:20,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:01:20,348 INFO L225 Difference]: With dead ends: 104 [2021-12-17 10:01:20,352 INFO L226 Difference]: Without dead ends: 61 [2021-12-17 10:01:20,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 10:01:20,363 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 25 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:01:20,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 224 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:01:20,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-17 10:01:20,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 39. [2021-12-17 10:01:20,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-17 10:01:20,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 57 transitions. [2021-12-17 10:01:20,410 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 57 transitions. Word has length 11 [2021-12-17 10:01:20,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:01:20,410 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 57 transitions. [2021-12-17 10:01:20,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:01:20,411 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 57 transitions. [2021-12-17 10:01:20,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-17 10:01:20,411 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:01:20,411 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:01:20,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 10:01:20,412 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:01:20,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:01:20,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1749464583, now seen corresponding path program 1 times [2021-12-17 10:01:20,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:01:20,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598014816] [2021-12-17 10:01:20,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:01:20,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:01:20,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:20,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:01:20,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:01:20,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598014816] [2021-12-17 10:01:20,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598014816] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 10:01:20,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 10:01:20,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 10:01:20,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913577360] [2021-12-17 10:01:20,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 10:01:20,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 10:01:20,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:01:20,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 10:01:20,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 10:01:20,471 INFO L87 Difference]: Start difference. First operand 39 states and 57 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:01:20,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:01:20,525 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-12-17 10:01:20,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 10:01:20,525 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-17 10:01:20,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:01:20,527 INFO L225 Difference]: With dead ends: 46 [2021-12-17 10:01:20,527 INFO L226 Difference]: Without dead ends: 44 [2021-12-17 10:01:20,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 10:01:20,528 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 17 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 10:01:20,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 141 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 10:01:20,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-17 10:01:20,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-12-17 10:01:20,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-17 10:01:20,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 60 transitions. [2021-12-17 10:01:20,539 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 60 transitions. Word has length 11 [2021-12-17 10:01:20,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:01:20,539 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 60 transitions. [2021-12-17 10:01:20,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:01:20,540 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 60 transitions. [2021-12-17 10:01:20,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-17 10:01:20,540 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:01:20,540 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:01:20,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 10:01:20,541 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:01:20,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:01:20,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1728015063, now seen corresponding path program 1 times [2021-12-17 10:01:20,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:01:20,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591031603] [2021-12-17 10:01:20,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:01:20,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:01:20,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:20,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:01:20,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:01:20,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591031603] [2021-12-17 10:01:20,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591031603] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 10:01:20,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 10:01:20,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 10:01:20,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070897445] [2021-12-17 10:01:20,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 10:01:20,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 10:01:20,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:01:20,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 10:01:20,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 10:01:20,604 INFO L87 Difference]: Start difference. First operand 43 states and 60 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:01:20,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:01:20,726 INFO L93 Difference]: Finished difference Result 76 states and 111 transitions. [2021-12-17 10:01:20,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 10:01:20,727 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-17 10:01:20,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:01:20,728 INFO L225 Difference]: With dead ends: 76 [2021-12-17 10:01:20,729 INFO L226 Difference]: Without dead ends: 74 [2021-12-17 10:01:20,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 10:01:20,730 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 30 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:01:20,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 214 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:01:20,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-17 10:01:20,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2021-12-17 10:01:20,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 26 states have call successors, (26), 4 states have call predecessors, (26), 4 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-17 10:01:20,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 102 transitions. [2021-12-17 10:01:20,744 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 102 transitions. Word has length 11 [2021-12-17 10:01:20,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:01:20,744 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 102 transitions. [2021-12-17 10:01:20,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:01:20,745 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 102 transitions. [2021-12-17 10:01:20,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-17 10:01:20,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:01:20,746 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:01:20,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 10:01:20,746 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:01:20,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:01:20,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1885075524, now seen corresponding path program 1 times [2021-12-17 10:01:20,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:01:20,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443499854] [2021-12-17 10:01:20,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:01:20,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:01:20,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:20,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 10:01:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:20,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:01:20,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:01:20,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443499854] [2021-12-17 10:01:20,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443499854] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 10:01:20,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 10:01:20,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 10:01:20,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104307440] [2021-12-17 10:01:20,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 10:01:20,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 10:01:20,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:01:20,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 10:01:20,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 10:01:20,829 INFO L87 Difference]: Start difference. First operand 69 states and 102 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 10:01:20,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:01:20,970 INFO L93 Difference]: Finished difference Result 102 states and 153 transitions. [2021-12-17 10:01:20,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 10:01:20,971 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-17 10:01:20,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:01:20,972 INFO L225 Difference]: With dead ends: 102 [2021-12-17 10:01:20,972 INFO L226 Difference]: Without dead ends: 100 [2021-12-17 10:01:20,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-17 10:01:20,974 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 43 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:01:20,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 269 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:01:20,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-17 10:01:20,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2021-12-17 10:01:20,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 52 states have internal predecessors, (68), 40 states have call successors, (40), 5 states have call predecessors, (40), 5 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2021-12-17 10:01:20,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 148 transitions. [2021-12-17 10:01:20,990 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 148 transitions. Word has length 16 [2021-12-17 10:01:20,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:01:20,990 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 148 transitions. [2021-12-17 10:01:20,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 10:01:20,991 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 148 transitions. [2021-12-17 10:01:20,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-17 10:01:20,992 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:01:20,992 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:01:20,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 10:01:20,992 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:01:20,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:01:20,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1503713061, now seen corresponding path program 1 times [2021-12-17 10:01:20,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:01:20,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897219741] [2021-12-17 10:01:20,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:01:20,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:01:21,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:21,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 10:01:21,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:21,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:01:21,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:01:21,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897219741] [2021-12-17 10:01:21,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897219741] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 10:01:21,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 10:01:21,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 10:01:21,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014752931] [2021-12-17 10:01:21,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 10:01:21,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 10:01:21,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:01:21,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 10:01:21,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 10:01:21,044 INFO L87 Difference]: Start difference. First operand 97 states and 148 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 10:01:21,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:01:21,090 INFO L93 Difference]: Finished difference Result 103 states and 153 transitions. [2021-12-17 10:01:21,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 10:01:21,090 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-17 10:01:21,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:01:21,093 INFO L225 Difference]: With dead ends: 103 [2021-12-17 10:01:21,093 INFO L226 Difference]: Without dead ends: 101 [2021-12-17 10:01:21,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 10:01:21,094 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 16 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 10:01:21,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 141 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 10:01:21,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-17 10:01:21,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-12-17 10:01:21,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 55 states have internal predecessors, (71), 40 states have call successors, (40), 6 states have call predecessors, (40), 6 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2021-12-17 10:01:21,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 151 transitions. [2021-12-17 10:01:21,109 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 151 transitions. Word has length 16 [2021-12-17 10:01:21,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:01:21,110 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 151 transitions. [2021-12-17 10:01:21,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 10:01:21,110 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 151 transitions. [2021-12-17 10:01:21,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-17 10:01:21,111 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:01:21,111 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:01:21,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 10:01:21,112 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:01:21,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:01:21,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1518715221, now seen corresponding path program 1 times [2021-12-17 10:01:21,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:01:21,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589416856] [2021-12-17 10:01:21,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:01:21,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:01:21,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:21,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 10:01:21,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:21,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:01:21,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:01:21,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589416856] [2021-12-17 10:01:21,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589416856] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 10:01:21,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 10:01:21,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 10:01:21,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464689157] [2021-12-17 10:01:21,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 10:01:21,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 10:01:21,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:01:21,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 10:01:21,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 10:01:21,169 INFO L87 Difference]: Start difference. First operand 101 states and 151 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 10:01:21,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:01:21,356 INFO L93 Difference]: Finished difference Result 155 states and 240 transitions. [2021-12-17 10:01:21,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 10:01:21,357 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-17 10:01:21,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:01:21,359 INFO L225 Difference]: With dead ends: 155 [2021-12-17 10:01:21,359 INFO L226 Difference]: Without dead ends: 153 [2021-12-17 10:01:21,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-17 10:01:21,361 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 64 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:01:21,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 289 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:01:21,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-17 10:01:21,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 137. [2021-12-17 10:01:21,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 69 states have (on average 1.3623188405797102) internal successors, (94), 72 states have internal predecessors, (94), 60 states have call successors, (60), 7 states have call predecessors, (60), 7 states have return successors, (60), 57 states have call predecessors, (60), 60 states have call successors, (60) [2021-12-17 10:01:21,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 214 transitions. [2021-12-17 10:01:21,380 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 214 transitions. Word has length 16 [2021-12-17 10:01:21,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:01:21,380 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 214 transitions. [2021-12-17 10:01:21,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 10:01:21,381 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 214 transitions. [2021-12-17 10:01:21,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-17 10:01:21,382 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:01:21,382 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:01:21,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 10:01:21,382 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:01:21,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:01:21,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1823085758, now seen corresponding path program 1 times [2021-12-17 10:01:21,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:01:21,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948088423] [2021-12-17 10:01:21,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:01:21,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:01:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:21,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 10:01:21,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:21,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:01:21,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:01:21,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948088423] [2021-12-17 10:01:21,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948088423] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 10:01:21,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 10:01:21,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 10:01:21,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303970550] [2021-12-17 10:01:21,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 10:01:21,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 10:01:21,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:01:21,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 10:01:21,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 10:01:21,439 INFO L87 Difference]: Start difference. First operand 137 states and 214 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 10:01:21,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:01:21,465 INFO L93 Difference]: Finished difference Result 274 states and 436 transitions. [2021-12-17 10:01:21,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 10:01:21,466 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-17 10:01:21,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:01:21,468 INFO L225 Difference]: With dead ends: 274 [2021-12-17 10:01:21,468 INFO L226 Difference]: Without dead ends: 205 [2021-12-17 10:01:21,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 10:01:21,470 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 11 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 10:01:21,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 126 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 10:01:21,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-12-17 10:01:21,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2021-12-17 10:01:21,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 99 states have (on average 1.404040404040404) internal successors, (139), 103 states have internal predecessors, (139), 98 states have call successors, (98), 7 states have call predecessors, (98), 7 states have return successors, (98), 94 states have call predecessors, (98), 98 states have call successors, (98) [2021-12-17 10:01:21,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 335 transitions. [2021-12-17 10:01:21,497 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 335 transitions. Word has length 16 [2021-12-17 10:01:21,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:01:21,497 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 335 transitions. [2021-12-17 10:01:21,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 10:01:21,498 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 335 transitions. [2021-12-17 10:01:21,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-17 10:01:21,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:01:21,499 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:01:21,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 10:01:21,499 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:01:21,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:01:21,500 INFO L85 PathProgramCache]: Analyzing trace with hash -2105521235, now seen corresponding path program 1 times [2021-12-17 10:01:21,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:01:21,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759291062] [2021-12-17 10:01:21,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:01:21,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:01:21,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:21,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 10:01:21,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:21,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:01:21,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:01:21,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759291062] [2021-12-17 10:01:21,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759291062] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 10:01:21,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 10:01:21,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 10:01:21,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593471988] [2021-12-17 10:01:21,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 10:01:21,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 10:01:21,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:01:21,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 10:01:21,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 10:01:21,542 INFO L87 Difference]: Start difference. First operand 205 states and 335 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 10:01:21,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:01:21,601 INFO L93 Difference]: Finished difference Result 230 states and 359 transitions. [2021-12-17 10:01:21,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 10:01:21,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-17 10:01:21,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:01:21,603 INFO L225 Difference]: With dead ends: 230 [2021-12-17 10:01:21,604 INFO L226 Difference]: Without dead ends: 183 [2021-12-17 10:01:21,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-17 10:01:21,605 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 5 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 10:01:21,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 181 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 10:01:21,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-12-17 10:01:21,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2021-12-17 10:01:21,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 89 states have (on average 1.3932584269662922) internal successors, (124), 93 states have internal predecessors, (124), 86 states have call successors, (86), 7 states have call predecessors, (86), 7 states have return successors, (86), 82 states have call predecessors, (86), 86 states have call successors, (86) [2021-12-17 10:01:21,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 296 transitions. [2021-12-17 10:01:21,625 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 296 transitions. Word has length 16 [2021-12-17 10:01:21,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:01:21,626 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 296 transitions. [2021-12-17 10:01:21,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 10:01:21,626 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 296 transitions. [2021-12-17 10:01:21,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-17 10:01:21,627 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:01:21,627 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:01:21,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 10:01:21,628 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:01:21,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:01:21,628 INFO L85 PathProgramCache]: Analyzing trace with hash 186914675, now seen corresponding path program 1 times [2021-12-17 10:01:21,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:01:21,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678463857] [2021-12-17 10:01:21,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:01:21,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:01:21,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:21,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 10:01:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:21,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 10:01:21,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:21,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 10:01:21,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:01:21,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678463857] [2021-12-17 10:01:21,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678463857] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 10:01:21,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 10:01:21,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 10:01:21,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072930388] [2021-12-17 10:01:21,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 10:01:21,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 10:01:21,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:01:21,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 10:01:21,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 10:01:21,685 INFO L87 Difference]: Start difference. First operand 183 states and 296 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 10:01:21,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:01:21,779 INFO L93 Difference]: Finished difference Result 217 states and 348 transitions. [2021-12-17 10:01:21,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 10:01:21,780 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2021-12-17 10:01:21,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:01:21,782 INFO L225 Difference]: With dead ends: 217 [2021-12-17 10:01:21,782 INFO L226 Difference]: Without dead ends: 215 [2021-12-17 10:01:21,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 10:01:21,783 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 43 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:01:21,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 305 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:01:21,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-12-17 10:01:21,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 197. [2021-12-17 10:01:21,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 96 states have (on average 1.3854166666666667) internal successors, (133), 102 states have internal predecessors, (133), 92 states have call successors, (92), 8 states have call predecessors, (92), 8 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2021-12-17 10:01:21,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 317 transitions. [2021-12-17 10:01:21,811 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 317 transitions. Word has length 23 [2021-12-17 10:01:21,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:01:21,811 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 317 transitions. [2021-12-17 10:01:21,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 10:01:21,812 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 317 transitions. [2021-12-17 10:01:21,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-17 10:01:21,812 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:01:21,813 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:01:21,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 10:01:21,813 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:01:21,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:01:21,814 INFO L85 PathProgramCache]: Analyzing trace with hash 768784003, now seen corresponding path program 1 times [2021-12-17 10:01:21,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:01:21,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575058647] [2021-12-17 10:01:21,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:01:21,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:01:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:21,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 10:01:21,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:21,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 10:01:21,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:21,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 10:01:21,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:01:21,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575058647] [2021-12-17 10:01:21,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575058647] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 10:01:21,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 10:01:21,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 10:01:21,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291580155] [2021-12-17 10:01:21,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 10:01:21,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 10:01:21,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:01:21,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 10:01:21,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 10:01:21,855 INFO L87 Difference]: Start difference. First operand 197 states and 317 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 10:01:22,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:01:22,041 INFO L93 Difference]: Finished difference Result 520 states and 854 transitions. [2021-12-17 10:01:22,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 10:01:22,042 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), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-12-17 10:01:22,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:01:22,044 INFO L225 Difference]: With dead ends: 520 [2021-12-17 10:01:22,044 INFO L226 Difference]: Without dead ends: 366 [2021-12-17 10:01:22,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-17 10:01:22,046 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 76 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:01:22,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 160 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:01:22,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-12-17 10:01:22,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 197. [2021-12-17 10:01:22,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 96 states have (on average 1.3645833333333333) internal successors, (131), 102 states have internal predecessors, (131), 92 states have call successors, (92), 8 states have call predecessors, (92), 8 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2021-12-17 10:01:22,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 315 transitions. [2021-12-17 10:01:22,073 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 315 transitions. Word has length 25 [2021-12-17 10:01:22,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:01:22,074 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 315 transitions. [2021-12-17 10:01:22,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 10:01:22,074 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 315 transitions. [2021-12-17 10:01:22,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-17 10:01:22,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:01:22,076 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:01:22,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 10:01:22,076 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:01:22,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:01:22,077 INFO L85 PathProgramCache]: Analyzing trace with hash -299150037, now seen corresponding path program 1 times [2021-12-17 10:01:22,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:01:22,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522841986] [2021-12-17 10:01:22,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:01:22,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:01:22,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:22,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 10:01:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:22,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 10:01:22,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:22,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 10:01:22,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 10:01:22,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:01:22,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522841986] [2021-12-17 10:01:22,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522841986] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 10:01:22,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 10:01:22,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 10:01:22,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606533868] [2021-12-17 10:01:22,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 10:01:22,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 10:01:22,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:01:22,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 10:01:22,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 10:01:22,174 INFO L87 Difference]: Start difference. First operand 197 states and 315 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 10:01:22,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:01:22,316 INFO L93 Difference]: Finished difference Result 291 states and 471 transitions. [2021-12-17 10:01:22,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 10:01:22,317 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2021-12-17 10:01:22,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:01:22,320 INFO L225 Difference]: With dead ends: 291 [2021-12-17 10:01:22,320 INFO L226 Difference]: Without dead ends: 289 [2021-12-17 10:01:22,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 10:01:22,321 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 24 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:01:22,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 239 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:01:22,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-12-17 10:01:22,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 269. [2021-12-17 10:01:22,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 118 states have (on average 1.3644067796610169) internal successors, (161), 132 states have internal predecessors, (161), 140 states have call successors, (140), 10 states have call predecessors, (140), 10 states have return successors, (140), 126 states have call predecessors, (140), 140 states have call successors, (140) [2021-12-17 10:01:22,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 441 transitions. [2021-12-17 10:01:22,351 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 441 transitions. Word has length 26 [2021-12-17 10:01:22,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:01:22,352 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 441 transitions. [2021-12-17 10:01:22,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 10:01:22,352 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 441 transitions. [2021-12-17 10:01:22,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-17 10:01:22,354 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:01:22,355 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:01:22,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 10:01:22,355 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:01:22,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:01:22,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1714235681, now seen corresponding path program 1 times [2021-12-17 10:01:22,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:01:22,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246858863] [2021-12-17 10:01:22,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:01:22,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:01:22,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:22,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 10:01:22,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:22,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 10:01:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:22,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 10:01:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:22,447 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 10:01:22,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:01:22,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246858863] [2021-12-17 10:01:22,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246858863] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 10:01:22,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 10:01:22,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 10:01:22,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509047399] [2021-12-17 10:01:22,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 10:01:22,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 10:01:22,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:01:22,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 10:01:22,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 10:01:22,450 INFO L87 Difference]: Start difference. First operand 269 states and 441 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 10:01:22,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:01:22,593 INFO L93 Difference]: Finished difference Result 317 states and 516 transitions. [2021-12-17 10:01:22,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 10:01:22,593 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-12-17 10:01:22,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:01:22,598 INFO L225 Difference]: With dead ends: 317 [2021-12-17 10:01:22,599 INFO L226 Difference]: Without dead ends: 315 [2021-12-17 10:01:22,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-17 10:01:22,600 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 71 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:01:22,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 233 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:01:22,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-12-17 10:01:22,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 287. [2021-12-17 10:01:22,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 125 states have (on average 1.36) internal successors, (170), 141 states have internal predecessors, (170), 150 states have call successors, (150), 11 states have call predecessors, (150), 11 states have return successors, (150), 134 states have call predecessors, (150), 150 states have call successors, (150) [2021-12-17 10:01:22,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 470 transitions. [2021-12-17 10:01:22,632 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 470 transitions. Word has length 28 [2021-12-17 10:01:22,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:01:22,633 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 470 transitions. [2021-12-17 10:01:22,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 10:01:22,633 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 470 transitions. [2021-12-17 10:01:22,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-17 10:01:22,635 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:01:22,635 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:01:22,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 10:01:22,635 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:01:22,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:01:22,636 INFO L85 PathProgramCache]: Analyzing trace with hash 523331784, now seen corresponding path program 1 times [2021-12-17 10:01:22,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:01:22,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214031400] [2021-12-17 10:01:22,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:01:22,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:01:22,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:22,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 10:01:22,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:22,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 10:01:22,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:22,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 10:01:22,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:22,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 10:01:22,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:22,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-17 10:01:22,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:22,739 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 10:01:22,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:01:22,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214031400] [2021-12-17 10:01:22,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214031400] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 10:01:22,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 10:01:22,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 10:01:22,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175543767] [2021-12-17 10:01:22,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 10:01:22,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 10:01:22,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:01:22,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 10:01:22,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 10:01:22,742 INFO L87 Difference]: Start difference. First operand 287 states and 470 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 10:01:22,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:01:22,905 INFO L93 Difference]: Finished difference Result 329 states and 527 transitions. [2021-12-17 10:01:22,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 10:01:22,906 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2021-12-17 10:01:22,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:01:22,908 INFO L225 Difference]: With dead ends: 329 [2021-12-17 10:01:22,908 INFO L226 Difference]: Without dead ends: 327 [2021-12-17 10:01:22,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-17 10:01:22,909 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 34 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:01:22,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 274 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:01:22,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-12-17 10:01:22,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 291. [2021-12-17 10:01:22,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 128 states have (on average 1.3515625) internal successors, (173), 144 states have internal predecessors, (173), 150 states have call successors, (150), 12 states have call predecessors, (150), 12 states have return successors, (150), 134 states have call predecessors, (150), 150 states have call successors, (150) [2021-12-17 10:01:22,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 473 transitions. [2021-12-17 10:01:22,937 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 473 transitions. Word has length 38 [2021-12-17 10:01:22,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:01:22,937 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 473 transitions. [2021-12-17 10:01:22,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 10:01:22,938 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 473 transitions. [2021-12-17 10:01:22,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-17 10:01:22,939 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:01:22,939 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:01:22,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 10:01:22,939 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:01:22,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:01:22,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1856149802, now seen corresponding path program 1 times [2021-12-17 10:01:22,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:01:22,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479302160] [2021-12-17 10:01:22,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:01:22,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:01:22,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:22,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 10:01:22,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:22,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 10:01:22,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:22,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 10:01:22,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:22,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 10:01:22,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:22,987 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 10:01:22,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:01:22,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479302160] [2021-12-17 10:01:22,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479302160] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 10:01:22,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 10:01:22,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 10:01:22,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101032763] [2021-12-17 10:01:22,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 10:01:22,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 10:01:22,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:01:22,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 10:01:22,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 10:01:22,990 INFO L87 Difference]: Start difference. First operand 291 states and 473 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 10:01:23,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:01:23,105 INFO L93 Difference]: Finished difference Result 297 states and 478 transitions. [2021-12-17 10:01:23,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 10:01:23,106 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2021-12-17 10:01:23,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:01:23,108 INFO L225 Difference]: With dead ends: 297 [2021-12-17 10:01:23,108 INFO L226 Difference]: Without dead ends: 295 [2021-12-17 10:01:23,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-17 10:01:23,109 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 29 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:01:23,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 133 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:01:23,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-12-17 10:01:23,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2021-12-17 10:01:23,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 131 states have (on average 1.3435114503816794) internal successors, (176), 147 states have internal predecessors, (176), 150 states have call successors, (150), 13 states have call predecessors, (150), 13 states have return successors, (150), 134 states have call predecessors, (150), 150 states have call successors, (150) [2021-12-17 10:01:23,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 476 transitions. [2021-12-17 10:01:23,153 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 476 transitions. Word has length 38 [2021-12-17 10:01:23,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:01:23,153 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 476 transitions. [2021-12-17 10:01:23,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 10:01:23,154 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 476 transitions. [2021-12-17 10:01:23,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-17 10:01:23,155 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:01:23,155 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:01:23,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 10:01:23,155 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:01:23,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:01:23,156 INFO L85 PathProgramCache]: Analyzing trace with hash 2019762676, now seen corresponding path program 1 times [2021-12-17 10:01:23,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:01:23,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030133726] [2021-12-17 10:01:23,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:01:23,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:01:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:23,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 10:01:23,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:23,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 10:01:23,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:23,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 10:01:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:23,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 10:01:23,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:23,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-17 10:01:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:23,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 10:01:23,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:23,218 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-17 10:01:23,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:01:23,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030133726] [2021-12-17 10:01:23,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030133726] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 10:01:23,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 10:01:23,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 10:01:23,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922061829] [2021-12-17 10:01:23,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 10:01:23,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 10:01:23,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:01:23,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 10:01:23,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 10:01:23,220 INFO L87 Difference]: Start difference. First operand 295 states and 476 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-17 10:01:23,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:01:23,348 INFO L93 Difference]: Finished difference Result 329 states and 525 transitions. [2021-12-17 10:01:23,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 10:01:23,349 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 50 [2021-12-17 10:01:23,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:01:23,351 INFO L225 Difference]: With dead ends: 329 [2021-12-17 10:01:23,351 INFO L226 Difference]: Without dead ends: 327 [2021-12-17 10:01:23,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-17 10:01:23,352 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 42 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:01:23,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 259 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:01:23,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-12-17 10:01:23,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 174. [2021-12-17 10:01:23,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 85 states have (on average 1.2705882352941176) internal successors, (108), 93 states have internal predecessors, (108), 76 states have call successors, (76), 12 states have call predecessors, (76), 12 states have return successors, (76), 68 states have call predecessors, (76), 76 states have call successors, (76) [2021-12-17 10:01:23,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 260 transitions. [2021-12-17 10:01:23,373 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 260 transitions. Word has length 50 [2021-12-17 10:01:23,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:01:23,373 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 260 transitions. [2021-12-17 10:01:23,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-17 10:01:23,374 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 260 transitions. [2021-12-17 10:01:23,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-17 10:01:23,374 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:01:23,375 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:01:23,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 10:01:23,375 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:01:23,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:01:23,376 INFO L85 PathProgramCache]: Analyzing trace with hash -2077570128, now seen corresponding path program 1 times [2021-12-17 10:01:23,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:01:23,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188462046] [2021-12-17 10:01:23,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:01:23,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:01:23,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:23,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 10:01:23,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:23,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 10:01:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:23,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 10:01:23,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:23,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 10:01:23,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:23,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-17 10:01:23,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:23,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-17 10:01:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:23,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 10:01:23,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:23,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 10:01:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:23,432 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-17 10:01:23,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:01:23,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188462046] [2021-12-17 10:01:23,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188462046] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:01:23,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977848069] [2021-12-17 10:01:23,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:01:23,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:01:23,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:01:23,435 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:01:23,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 10:01:23,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:23,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 10:01:23,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:01:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-17 10:01:23,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 10:01:23,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977848069] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 10:01:23,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 10:01:23,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2021-12-17 10:01:23,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654274599] [2021-12-17 10:01:23,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 10:01:23,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 10:01:23,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:01:23,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 10:01:23,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-17 10:01:23,911 INFO L87 Difference]: Start difference. First operand 174 states and 260 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 10:01:24,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:01:24,076 INFO L93 Difference]: Finished difference Result 505 states and 801 transitions. [2021-12-17 10:01:24,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 10:01:24,076 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 58 [2021-12-17 10:01:24,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:01:24,079 INFO L225 Difference]: With dead ends: 505 [2021-12-17 10:01:24,079 INFO L226 Difference]: Without dead ends: 335 [2021-12-17 10:01:24,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-12-17 10:01:24,080 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 35 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:01:24,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 219 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:01:24,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-12-17 10:01:24,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 311. [2021-12-17 10:01:24,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 136 states have (on average 1.3455882352941178) internal successors, (183), 152 states have internal predecessors, (183), 162 states have call successors, (162), 12 states have call predecessors, (162), 12 states have return successors, (162), 146 states have call predecessors, (162), 162 states have call successors, (162) [2021-12-17 10:01:24,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 507 transitions. [2021-12-17 10:01:24,124 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 507 transitions. Word has length 58 [2021-12-17 10:01:24,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:01:24,124 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 507 transitions. [2021-12-17 10:01:24,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 10:01:24,125 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 507 transitions. [2021-12-17 10:01:24,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-17 10:01:24,126 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:01:24,127 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:01:24,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-17 10:01:24,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-17 10:01:24,350 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:01:24,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:01:24,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1244619342, now seen corresponding path program 1 times [2021-12-17 10:01:24,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:01:24,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712933163] [2021-12-17 10:01:24,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:01:24,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:01:24,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:24,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 10:01:24,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:24,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 10:01:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:24,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 10:01:24,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:24,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 10:01:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:24,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-17 10:01:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:24,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-17 10:01:24,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:24,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 10:01:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:24,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 10:01:24,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:24,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 10:01:24,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:24,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-17 10:01:24,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:24,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 10:01:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:24,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 10:01:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:24,449 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-12-17 10:01:24,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:01:24,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712933163] [2021-12-17 10:01:24,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712933163] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:01:24,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335077792] [2021-12-17 10:01:24,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:01:24,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:01:24,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:01:24,452 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:01:24,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 10:01:24,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:24,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 10:01:24,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:01:24,995 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2021-12-17 10:01:24,996 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 10:01:24,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335077792] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 10:01:24,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 10:01:24,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-12-17 10:01:24,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066008206] [2021-12-17 10:01:24,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 10:01:24,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 10:01:24,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:01:24,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 10:01:24,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-12-17 10:01:24,997 INFO L87 Difference]: Start difference. First operand 311 states and 507 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-17 10:01:25,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:01:25,249 INFO L93 Difference]: Finished difference Result 579 states and 926 transitions. [2021-12-17 10:01:25,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 10:01:25,249 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 80 [2021-12-17 10:01:25,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:01:25,251 INFO L225 Difference]: With dead ends: 579 [2021-12-17 10:01:25,252 INFO L226 Difference]: Without dead ends: 303 [2021-12-17 10:01:25,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-12-17 10:01:25,253 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 29 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:01:25,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 261 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:01:25,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-12-17 10:01:25,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 267. [2021-12-17 10:01:25,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 124 states have (on average 1.314516129032258) internal successors, (163), 136 states have internal predecessors, (163), 130 states have call successors, (130), 12 states have call predecessors, (130), 12 states have return successors, (130), 118 states have call predecessors, (130), 130 states have call successors, (130) [2021-12-17 10:01:25,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 423 transitions. [2021-12-17 10:01:25,284 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 423 transitions. Word has length 80 [2021-12-17 10:01:25,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:01:25,284 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 423 transitions. [2021-12-17 10:01:25,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-17 10:01:25,285 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 423 transitions. [2021-12-17 10:01:25,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-17 10:01:25,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:01:25,286 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:01:25,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-17 10:01:25,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-17 10:01:25,510 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:01:25,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:01:25,510 INFO L85 PathProgramCache]: Analyzing trace with hash 293720688, now seen corresponding path program 1 times [2021-12-17 10:01:25,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:01:25,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503755398] [2021-12-17 10:01:25,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:01:25,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:01:25,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:25,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 10:01:25,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:25,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 10:01:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:25,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 10:01:25,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:25,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 10:01:25,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:25,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-17 10:01:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:25,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-17 10:01:25,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:25,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 10:01:25,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:25,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 10:01:25,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:25,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 10:01:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:25,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-17 10:01:25,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:25,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 10:01:25,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:25,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 10:01:25,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:25,612 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-12-17 10:01:25,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:01:25,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503755398] [2021-12-17 10:01:25,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503755398] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:01:25,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107853090] [2021-12-17 10:01:25,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:01:25,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:01:25,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:01:25,615 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:01:25,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 10:01:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:25,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 10:01:25,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:01:26,047 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2021-12-17 10:01:26,047 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 10:01:26,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107853090] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 10:01:26,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 10:01:26,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-12-17 10:01:26,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865884219] [2021-12-17 10:01:26,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 10:01:26,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 10:01:26,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:01:26,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 10:01:26,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-17 10:01:26,050 INFO L87 Difference]: Start difference. First operand 267 states and 423 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 10:01:26,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:01:26,208 INFO L93 Difference]: Finished difference Result 497 states and 780 transitions. [2021-12-17 10:01:26,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 10:01:26,209 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 80 [2021-12-17 10:01:26,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:01:26,211 INFO L225 Difference]: With dead ends: 497 [2021-12-17 10:01:26,211 INFO L226 Difference]: Without dead ends: 221 [2021-12-17 10:01:26,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-17 10:01:26,212 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 20 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:01:26,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 240 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:01:26,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-17 10:01:26,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 210. [2021-12-17 10:01:26,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 99 states have (on average 1.2828282828282829) internal successors, (127), 109 states have internal predecessors, (127), 98 states have call successors, (98), 12 states have call predecessors, (98), 12 states have return successors, (98), 88 states have call predecessors, (98), 98 states have call successors, (98) [2021-12-17 10:01:26,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 323 transitions. [2021-12-17 10:01:26,247 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 323 transitions. Word has length 80 [2021-12-17 10:01:26,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:01:26,248 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 323 transitions. [2021-12-17 10:01:26,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-17 10:01:26,248 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 323 transitions. [2021-12-17 10:01:26,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-17 10:01:26,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:01:26,251 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:01:26,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 10:01:26,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-17 10:01:26,469 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:01:26,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:01:26,469 INFO L85 PathProgramCache]: Analyzing trace with hash -493164145, now seen corresponding path program 1 times [2021-12-17 10:01:26,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:01:26,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312493536] [2021-12-17 10:01:26,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:01:26,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:01:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:26,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 10:01:26,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:26,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 10:01:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:26,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 10:01:26,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:26,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 10:01:26,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:26,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-17 10:01:26,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:26,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 10:01:26,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:26,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 10:01:26,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:26,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 10:01:26,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:26,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-17 10:01:26,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:26,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-17 10:01:26,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:26,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 10:01:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:26,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-17 10:01:26,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:26,552 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2021-12-17 10:01:26,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:01:26,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312493536] [2021-12-17 10:01:26,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312493536] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:01:26,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20952750] [2021-12-17 10:01:26,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:01:26,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:01:26,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:01:26,556 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:01:26,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 10:01:26,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:26,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 10:01:26,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:01:26,757 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-12-17 10:01:26,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:01:26,949 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-12-17 10:01:26,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20952750] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:01:26,950 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:01:26,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2021-12-17 10:01:26,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61634923] [2021-12-17 10:01:26,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:01:26,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 10:01:26,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:01:26,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 10:01:26,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-17 10:01:26,953 INFO L87 Difference]: Start difference. First operand 210 states and 323 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 5 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 5 states have call predecessors, (30), 5 states have call successors, (30) [2021-12-17 10:01:28,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:01:28,109 INFO L93 Difference]: Finished difference Result 512 states and 779 transitions. [2021-12-17 10:01:28,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 10:01:28,110 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 5 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 5 states have call predecessors, (30), 5 states have call successors, (30) Word has length 85 [2021-12-17 10:01:28,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:01:28,112 INFO L225 Difference]: With dead ends: 512 [2021-12-17 10:01:28,112 INFO L226 Difference]: Without dead ends: 342 [2021-12-17 10:01:28,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=419, Invalid=1221, Unknown=0, NotChecked=0, Total=1640 [2021-12-17 10:01:28,113 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 192 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 644 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 1362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 644 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 10:01:28,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 825 Invalid, 1362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [644 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 10:01:28,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-12-17 10:01:28,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 228. [2021-12-17 10:01:28,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 109 states have (on average 1.2568807339449541) internal successors, (137), 118 states have internal predecessors, (137), 106 states have call successors, (106), 12 states have call predecessors, (106), 12 states have return successors, (106), 97 states have call predecessors, (106), 106 states have call successors, (106) [2021-12-17 10:01:28,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 349 transitions. [2021-12-17 10:01:28,140 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 349 transitions. Word has length 85 [2021-12-17 10:01:28,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:01:28,140 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 349 transitions. [2021-12-17 10:01:28,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 5 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 5 states have call predecessors, (30), 5 states have call successors, (30) [2021-12-17 10:01:28,141 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 349 transitions. [2021-12-17 10:01:28,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-17 10:01:28,142 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:01:28,142 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:01:28,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 10:01:28,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:01:28,355 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:01:28,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:01:28,356 INFO L85 PathProgramCache]: Analyzing trace with hash -539919791, now seen corresponding path program 1 times [2021-12-17 10:01:28,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:01:28,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014744937] [2021-12-17 10:01:28,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:01:28,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:01:28,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:28,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 10:01:28,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:28,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 10:01:28,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:28,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 10:01:28,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:28,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 10:01:28,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:28,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-17 10:01:28,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:28,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 10:01:28,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:28,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-17 10:01:28,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:28,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 10:01:28,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:28,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-17 10:01:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:28,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-17 10:01:28,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:28,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 10:01:28,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:28,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 10:01:28,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:28,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 10:01:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:28,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-17 10:01:28,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:28,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-17 10:01:28,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:28,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-17 10:01:28,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:28,470 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 32 proven. 20 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-12-17 10:01:28,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:01:28,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014744937] [2021-12-17 10:01:28,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014744937] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:01:28,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868679948] [2021-12-17 10:01:28,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:01:28,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:01:28,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:01:28,472 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:01:28,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 10:01:28,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:28,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 10:01:28,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:01:28,998 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 153 proven. 7 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2021-12-17 10:01:28,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:01:29,346 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 44 proven. 8 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-12-17 10:01:29,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868679948] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:01:29,347 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:01:29,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2021-12-17 10:01:29,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727113194] [2021-12-17 10:01:29,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:01:29,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-17 10:01:29,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:01:29,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-17 10:01:29,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-12-17 10:01:29,349 INFO L87 Difference]: Start difference. First operand 228 states and 349 transitions. Second operand has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 12 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 12 states have call predecessors, (48), 12 states have call successors, (48) [2021-12-17 10:01:39,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:01:39,021 INFO L93 Difference]: Finished difference Result 1355 states and 2162 transitions. [2021-12-17 10:01:39,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-12-17 10:01:39,022 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 12 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 12 states have call predecessors, (48), 12 states have call successors, (48) Word has length 107 [2021-12-17 10:01:39,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:01:39,028 INFO L225 Difference]: With dead ends: 1355 [2021-12-17 10:01:39,029 INFO L226 Difference]: Without dead ends: 935 [2021-12-17 10:01:39,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10006 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3317, Invalid=23089, Unknown=0, NotChecked=0, Total=26406 [2021-12-17 10:01:39,036 INFO L933 BasicCegarLoop]: 649 mSDtfsCounter, 1053 mSDsluCounter, 4853 mSDsCounter, 0 mSdLazyCounter, 7052 mSolverCounterSat, 3370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 5502 SdHoareTripleChecker+Invalid, 10422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3370 IncrementalHoareTripleChecker+Valid, 7052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-17 10:01:39,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1057 Valid, 5502 Invalid, 10422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3370 Valid, 7052 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-12-17 10:01:39,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-12-17 10:01:39,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 364. [2021-12-17 10:01:39,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 172 states have (on average 1.2616279069767442) internal successors, (217), 185 states have internal predecessors, (217), 175 states have call successors, (175), 16 states have call predecessors, (175), 16 states have return successors, (175), 162 states have call predecessors, (175), 175 states have call successors, (175) [2021-12-17 10:01:39,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 567 transitions. [2021-12-17 10:01:39,092 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 567 transitions. Word has length 107 [2021-12-17 10:01:39,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:01:39,093 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 567 transitions. [2021-12-17 10:01:39,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 12 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 12 states have call predecessors, (48), 12 states have call successors, (48) [2021-12-17 10:01:39,093 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 567 transitions. [2021-12-17 10:01:39,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 10:01:39,095 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:01:39,095 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:01:39,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 10:01:39,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:01:39,310 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:01:39,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:01:39,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1988686597, now seen corresponding path program 1 times [2021-12-17 10:01:39,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:01:39,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870170903] [2021-12-17 10:01:39,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:01:39,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:01:39,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:39,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 10:01:39,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:39,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 10:01:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:39,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 10:01:39,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:39,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 10:01:39,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:39,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-17 10:01:39,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:39,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 10:01:39,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:39,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-17 10:01:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:39,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 10:01:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:39,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-17 10:01:39,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:39,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-17 10:01:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:39,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 10:01:39,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:39,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 10:01:39,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:39,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 10:01:39,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:39,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-17 10:01:39,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:39,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-17 10:01:39,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:39,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-17 10:01:39,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:39,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 10:01:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:39,446 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2021-12-17 10:01:39,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:01:39,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870170903] [2021-12-17 10:01:39,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870170903] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:01:39,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218577471] [2021-12-17 10:01:39,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:01:39,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:01:39,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:01:39,452 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:01:39,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 10:01:39,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:39,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 10:01:39,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:01:39,843 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2021-12-17 10:01:39,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:01:40,107 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2021-12-17 10:01:40,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218577471] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:01:40,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:01:40,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2021-12-17 10:01:40,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993193691] [2021-12-17 10:01:40,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:01:40,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 10:01:40,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:01:40,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 10:01:40,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-12-17 10:01:40,111 INFO L87 Difference]: Start difference. First operand 364 states and 567 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 18 states have internal predecessors, (66), 8 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (47), 8 states have call predecessors, (47), 8 states have call successors, (47) [2021-12-17 10:01:41,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:01:41,379 INFO L93 Difference]: Finished difference Result 755 states and 1189 transitions. [2021-12-17 10:01:41,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-17 10:01:41,379 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 18 states have internal predecessors, (66), 8 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (47), 8 states have call predecessors, (47), 8 states have call successors, (47) Word has length 112 [2021-12-17 10:01:41,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:01:41,382 INFO L225 Difference]: With dead ends: 755 [2021-12-17 10:01:41,383 INFO L226 Difference]: Without dead ends: 632 [2021-12-17 10:01:41,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 246 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=472, Invalid=1420, Unknown=0, NotChecked=0, Total=1892 [2021-12-17 10:01:41,384 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 366 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 1022 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 2062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1022 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 10:01:41,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 948 Invalid, 2062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1022 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 10:01:41,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-12-17 10:01:41,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 361. [2021-12-17 10:01:41,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 170 states have (on average 1.2705882352941176) internal successors, (216), 186 states have internal predecessors, (216), 171 states have call successors, (171), 19 states have call predecessors, (171), 19 states have return successors, (171), 155 states have call predecessors, (171), 171 states have call successors, (171) [2021-12-17 10:01:41,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 558 transitions. [2021-12-17 10:01:41,435 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 558 transitions. Word has length 112 [2021-12-17 10:01:41,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:01:41,435 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 558 transitions. [2021-12-17 10:01:41,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 18 states have internal predecessors, (66), 8 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (47), 8 states have call predecessors, (47), 8 states have call successors, (47) [2021-12-17 10:01:41,436 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 558 transitions. [2021-12-17 10:01:41,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-17 10:01:41,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:01:41,438 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:01:41,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 10:01:41,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:01:41,644 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:01:41,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:01:41,645 INFO L85 PathProgramCache]: Analyzing trace with hash 2043931853, now seen corresponding path program 1 times [2021-12-17 10:01:41,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:01:41,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194010356] [2021-12-17 10:01:41,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:01:41,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:01:41,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:41,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 10:01:41,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:41,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 10:01:41,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:41,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 10:01:41,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:41,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 10:01:41,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:41,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-17 10:01:41,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:41,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-17 10:01:41,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:41,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 10:01:41,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:41,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 10:01:41,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:41,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-17 10:01:41,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:41,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-17 10:01:41,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:41,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-17 10:01:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:41,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 10:01:41,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:41,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 10:01:41,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:41,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-17 10:01:41,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:41,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-17 10:01:41,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:41,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 10:01:41,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:41,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 10:01:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:41,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 10:01:41,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:41,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-17 10:01:41,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:41,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-17 10:01:41,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:41,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-17 10:01:41,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:41,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-17 10:01:41,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:41,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 10:01:41,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:41,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-17 10:01:41,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 73 proven. 13 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2021-12-17 10:01:41,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:01:41,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194010356] [2021-12-17 10:01:41,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194010356] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:01:41,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384781282] [2021-12-17 10:01:41,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:01:41,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:01:41,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:01:41,756 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:01:41,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 10:01:41,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:41,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 10:01:41,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:01:42,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 491 proven. 15 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2021-12-17 10:01:42,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:01:42,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 69 proven. 17 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2021-12-17 10:01:42,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384781282] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:01:42,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:01:42,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2021-12-17 10:01:42,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729891080] [2021-12-17 10:01:42,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:01:42,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-17 10:01:42,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:01:42,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-17 10:01:42,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-12-17 10:01:42,784 INFO L87 Difference]: Start difference. First operand 361 states and 558 transitions. Second operand has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 14 states have call successors, (74), 3 states have call predecessors, (74), 2 states have return successors, (72), 14 states have call predecessors, (72), 14 states have call successors, (72) [2021-12-17 10:01:45,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:01:45,512 INFO L93 Difference]: Finished difference Result 943 states and 1482 transitions. [2021-12-17 10:01:45,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-17 10:01:45,514 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 14 states have call successors, (74), 3 states have call predecessors, (74), 2 states have return successors, (72), 14 states have call predecessors, (72), 14 states have call successors, (72) Word has length 151 [2021-12-17 10:01:45,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:01:45,518 INFO L225 Difference]: With dead ends: 943 [2021-12-17 10:01:45,518 INFO L226 Difference]: Without dead ends: 695 [2021-12-17 10:01:45,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1015, Invalid=3815, Unknown=0, NotChecked=0, Total=4830 [2021-12-17 10:01:45,521 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 270 mSDsluCounter, 1914 mSDsCounter, 0 mSdLazyCounter, 2690 mSolverCounterSat, 1039 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 2160 SdHoareTripleChecker+Invalid, 3729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1039 IncrementalHoareTripleChecker+Valid, 2690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-17 10:01:45,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 2160 Invalid, 3729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1039 Valid, 2690 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-17 10:01:45,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2021-12-17 10:01:45,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 547. [2021-12-17 10:01:45,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 249 states have (on average 1.3092369477911647) internal successors, (326), 274 states have internal predecessors, (326), 276 states have call successors, (276), 21 states have call predecessors, (276), 21 states have return successors, (276), 251 states have call predecessors, (276), 276 states have call successors, (276) [2021-12-17 10:01:45,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 878 transitions. [2021-12-17 10:01:45,629 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 878 transitions. Word has length 151 [2021-12-17 10:01:45,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:01:45,630 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 878 transitions. [2021-12-17 10:01:45,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 14 states have call successors, (74), 3 states have call predecessors, (74), 2 states have return successors, (72), 14 states have call predecessors, (72), 14 states have call successors, (72) [2021-12-17 10:01:45,630 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 878 transitions. [2021-12-17 10:01:45,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-17 10:01:45,633 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:01:45,633 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:01:45,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 10:01:45,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:01:45,848 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:01:45,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:01:45,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1363812597, now seen corresponding path program 1 times [2021-12-17 10:01:45,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:01:45,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837937438] [2021-12-17 10:01:45,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:01:45,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:01:45,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:45,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 10:01:45,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:45,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 10:01:45,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:45,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 10:01:45,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:45,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 10:01:45,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:45,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-17 10:01:45,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:45,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-17 10:01:45,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:45,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 10:01:45,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:45,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 10:01:45,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:45,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-17 10:01:45,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:45,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-17 10:01:45,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:45,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-17 10:01:45,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:45,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 10:01:45,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:45,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 10:01:45,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:45,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-17 10:01:45,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:45,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-17 10:01:45,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:45,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 10:01:45,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:45,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 10:01:45,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:45,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 10:01:45,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:45,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-17 10:01:45,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:45,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-17 10:01:45,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:45,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-17 10:01:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:45,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-17 10:01:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:45,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-17 10:01:45,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:45,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-17 10:01:45,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:45,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 73 proven. 13 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2021-12-17 10:01:45,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:01:45,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837937438] [2021-12-17 10:01:45,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837937438] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:01:45,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85006092] [2021-12-17 10:01:45,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:01:45,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:01:45,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:01:45,965 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:01:45,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 10:01:46,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:46,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 10:01:46,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:01:46,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 73 proven. 13 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2021-12-17 10:01:46,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:01:46,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 73 proven. 13 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2021-12-17 10:01:46,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85006092] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:01:46,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:01:46,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2021-12-17 10:01:46,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713734381] [2021-12-17 10:01:46,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:01:46,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 10:01:46,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:01:46,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 10:01:46,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-17 10:01:46,518 INFO L87 Difference]: Start difference. First operand 547 states and 878 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 10 states have internal predecessors, (49), 6 states have call successors, (43), 3 states have call predecessors, (43), 1 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2021-12-17 10:01:46,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:01:46,876 INFO L93 Difference]: Finished difference Result 591 states and 939 transitions. [2021-12-17 10:01:46,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 10:01:46,876 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 10 states have internal predecessors, (49), 6 states have call successors, (43), 3 states have call predecessors, (43), 1 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) Word has length 151 [2021-12-17 10:01:46,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:01:46,879 INFO L225 Difference]: With dead ends: 591 [2021-12-17 10:01:46,879 INFO L226 Difference]: Without dead ends: 519 [2021-12-17 10:01:46,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 344 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-12-17 10:01:46,880 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 45 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 10:01:46,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 369 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 10:01:46,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-12-17 10:01:46,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 489. [2021-12-17 10:01:46,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 228 states have (on average 1.293859649122807) internal successors, (295), 250 states have internal predecessors, (295), 238 states have call successors, (238), 22 states have call predecessors, (238), 22 states have return successors, (238), 216 states have call predecessors, (238), 238 states have call successors, (238) [2021-12-17 10:01:46,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 771 transitions. [2021-12-17 10:01:46,950 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 771 transitions. Word has length 151 [2021-12-17 10:01:46,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:01:46,951 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 771 transitions. [2021-12-17 10:01:46,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 10 states have internal predecessors, (49), 6 states have call successors, (43), 3 states have call predecessors, (43), 1 states have return successors, (40), 6 states have call predecessors, (40), 6 states have call successors, (40) [2021-12-17 10:01:46,951 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 771 transitions. [2021-12-17 10:01:46,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-12-17 10:01:46,955 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:01:46,955 INFO L514 BasicCegarLoop]: trace histogram [36, 35, 35, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-17 10:01:46,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 10:01:47,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-17 10:01:47,169 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:01:47,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:01:47,169 INFO L85 PathProgramCache]: Analyzing trace with hash 2090740703, now seen corresponding path program 2 times [2021-12-17 10:01:47,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:01:47,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509551340] [2021-12-17 10:01:47,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:01:47,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:01:47,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 10:01:47,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 10:01:47,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 10:01:47,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 10:01:47,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-17 10:01:47,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 10:01:47,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-17 10:01:47,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 10:01:47,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-17 10:01:47,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-17 10:01:47,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 10:01:47,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-17 10:01:47,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-17 10:01:47,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-17 10:01:47,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-17 10:01:47,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 10:01:47,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 10:01:47,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-17 10:01:47,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-17 10:01:47,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-17 10:01:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 10:01:47,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 10:01:47,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-17 10:01:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-17 10:01:47,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-17 10:01:47,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-12-17 10:01:47,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-12-17 10:01:47,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-17 10:01:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-12-17 10:01:47,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-12-17 10:01:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2021-12-17 10:01:47,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2021-12-17 10:01:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2021-12-17 10:01:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2021-12-17 10:01:47,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2021-12-17 10:01:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:01:47,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 70 proven. 49 refuted. 0 times theorem prover too weak. 2425 trivial. 0 not checked. [2021-12-17 10:01:47,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:01:47,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509551340] [2021-12-17 10:01:47,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509551340] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:01:47,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512987797] [2021-12-17 10:01:47,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:01:47,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:01:47,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:01:47,400 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 10:01:47,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 10:01:47,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:01:47,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:01:47,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 10:01:47,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:01:48,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 1243 proven. 33 refuted. 0 times theorem prover too weak. 1268 trivial. 0 not checked. [2021-12-17 10:01:48,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:01:48,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 123 proven. 35 refuted. 0 times theorem prover too weak. 2386 trivial. 0 not checked. [2021-12-17 10:01:48,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512987797] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:01:48,651 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:01:48,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 25 [2021-12-17 10:01:48,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60234569] [2021-12-17 10:01:48,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:01:48,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-17 10:01:48,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:01:48,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-17 10:01:48,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-12-17 10:01:48,653 INFO L87 Difference]: Start difference. First operand 489 states and 771 transitions. Second operand has 25 states, 25 states have (on average 3.88) internal successors, (97), 24 states have internal predecessors, (97), 14 states have call successors, (82), 3 states have call predecessors, (82), 2 states have return successors, (81), 14 states have call predecessors, (81), 14 states have call successors, (81) [2021-12-17 10:01:55,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:01:55,494 INFO L93 Difference]: Finished difference Result 1646 states and 2663 transitions. [2021-12-17 10:01:55,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-12-17 10:01:55,494 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.88) internal successors, (97), 24 states have internal predecessors, (97), 14 states have call successors, (82), 3 states have call predecessors, (82), 2 states have return successors, (81), 14 states have call predecessors, (81), 14 states have call successors, (81) Word has length 218 [2021-12-17 10:01:55,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:01:55,495 INFO L225 Difference]: With dead ends: 1646 [2021-12-17 10:01:55,495 INFO L226 Difference]: Without dead ends: 0 [2021-12-17 10:01:55,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 632 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7586 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3283, Invalid=17309, Unknown=0, NotChecked=0, Total=20592 [2021-12-17 10:01:55,505 INFO L933 BasicCegarLoop]: 427 mSDtfsCounter, 564 mSDsluCounter, 2604 mSDsCounter, 0 mSdLazyCounter, 4409 mSolverCounterSat, 2838 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 3031 SdHoareTripleChecker+Invalid, 7247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2838 IncrementalHoareTripleChecker+Valid, 4409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:01:55,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 3031 Invalid, 7247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2838 Valid, 4409 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-12-17 10:01:55,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-17 10:01:55,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-17 10:01:55,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:01:55,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-17 10:01:55,507 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 218 [2021-12-17 10:01:55,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:01:55,507 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-17 10:01:55,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.88) internal successors, (97), 24 states have internal predecessors, (97), 14 states have call successors, (82), 3 states have call predecessors, (82), 2 states have return successors, (81), 14 states have call predecessors, (81), 14 states have call successors, (81) [2021-12-17 10:01:55,507 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-17 10:01:55,508 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-17 10:01:55,510 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 10:01:55,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 10:01:55,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-17 10:01:55,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-17 10:02:07,821 WARN L227 SmtUtils]: Spent 12.08s on a formula simplification. DAG size of input: 410 DAG size of output: 399 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) Killed by 15