./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 6c24879c 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-?-6c24879 [2022-07-12 03:57:07,480 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 03:57:07,482 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 03:57:07,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 03:57:07,520 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 03:57:07,521 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 03:57:07,522 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 03:57:07,523 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 03:57:07,524 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 03:57:07,524 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 03:57:07,525 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 03:57:07,526 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 03:57:07,526 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 03:57:07,526 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 03:57:07,527 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 03:57:07,528 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 03:57:07,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 03:57:07,529 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 03:57:07,530 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 03:57:07,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 03:57:07,541 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 03:57:07,542 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 03:57:07,543 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 03:57:07,544 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 03:57:07,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 03:57:07,547 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 03:57:07,547 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 03:57:07,547 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 03:57:07,548 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 03:57:07,548 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 03:57:07,549 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 03:57:07,549 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 03:57:07,549 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 03:57:07,550 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 03:57:07,550 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 03:57:07,551 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 03:57:07,551 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 03:57:07,552 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 03:57:07,552 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 03:57:07,552 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 03:57:07,553 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 03:57:07,555 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 03:57:07,556 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 03:57:07,572 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 03:57:07,573 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 03:57:07,574 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 03:57:07,574 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 03:57:07,575 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 03:57:07,575 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 03:57:07,575 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 03:57:07,575 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 03:57:07,575 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 03:57:07,576 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 03:57:07,576 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 03:57:07,576 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 03:57:07,577 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 03:57:07,577 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 03:57:07,577 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 03:57:07,577 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 03:57:07,577 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 03:57:07,577 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 03:57:07,577 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 03:57:07,578 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 03:57:07,578 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 03:57:07,578 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 03:57:07,578 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 03:57:07,578 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 03:57:07,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 03:57:07,579 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 03:57:07,579 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 03:57:07,579 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 03:57:07,579 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 03:57:07,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 03:57:07,580 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 03:57:07,580 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 03:57:07,580 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 03:57:07,580 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e7c8e5dc2a9e8f11b25d1bb9948f05f37b9553e3dc9f8bd8213088dea43cb37 [2022-07-12 03:57:07,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 03:57:07,790 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 03:57:07,792 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 03:57:07,793 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 03:57:07,794 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 03:57:07,794 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/heapsort.i [2022-07-12 03:57:07,855 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d171e2eef/31a2ddd3111e4f43bbe818ee4ccfc207/FLAGca0752036 [2022-07-12 03:57:08,202 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 03:57:08,203 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/heapsort.i [2022-07-12 03:57:08,207 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d171e2eef/31a2ddd3111e4f43bbe818ee4ccfc207/FLAGca0752036 [2022-07-12 03:57:08,215 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d171e2eef/31a2ddd3111e4f43bbe818ee4ccfc207 [2022-07-12 03:57:08,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 03:57:08,218 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 03:57:08,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 03:57:08,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 03:57:08,222 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 03:57:08,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 03:57:08" (1/1) ... [2022-07-12 03:57:08,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4797625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:08, skipping insertion in model container [2022-07-12 03:57:08,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 03:57:08" (1/1) ... [2022-07-12 03:57:08,227 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 03:57:08,237 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 03:57:08,347 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] [2022-07-12 03:57:08,360 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 03:57:08,366 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 03:57:08,376 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] [2022-07-12 03:57:08,386 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 03:57:08,399 INFO L208 MainTranslator]: Completed translation [2022-07-12 03:57:08,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:08 WrapperNode [2022-07-12 03:57:08,400 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 03:57:08,401 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 03:57:08,401 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 03:57:08,401 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 03:57:08,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:08" (1/1) ... [2022-07-12 03:57:08,415 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:08" (1/1) ... [2022-07-12 03:57:08,433 INFO L137 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2022-07-12 03:57:08,433 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 03:57:08,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 03:57:08,435 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 03:57:08,435 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 03:57:08,440 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:08" (1/1) ... [2022-07-12 03:57:08,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:08" (1/1) ... [2022-07-12 03:57:08,443 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:08" (1/1) ... [2022-07-12 03:57:08,443 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:08" (1/1) ... [2022-07-12 03:57:08,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:08" (1/1) ... [2022-07-12 03:57:08,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:08" (1/1) ... [2022-07-12 03:57:08,459 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:08" (1/1) ... [2022-07-12 03:57:08,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 03:57:08,465 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 03:57:08,465 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 03:57:08,465 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 03:57:08,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:08" (1/1) ... [2022-07-12 03:57:08,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 03:57:08,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:57:08,493 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) [2022-07-12 03:57:08,507 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 [2022-07-12 03:57:08,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 03:57:08,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 03:57:08,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 03:57:08,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 03:57:08,523 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-12 03:57:08,523 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-12 03:57:08,563 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 03:57:08,565 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 03:57:08,673 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 03:57:08,677 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 03:57:08,678 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-12 03:57:08,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 03:57:08 BoogieIcfgContainer [2022-07-12 03:57:08,691 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 03:57:08,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 03:57:08,692 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 03:57:08,695 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 03:57:08,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 03:57:08" (1/3) ... [2022-07-12 03:57:08,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629459f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 03:57:08, skipping insertion in model container [2022-07-12 03:57:08,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 03:57:08" (2/3) ... [2022-07-12 03:57:08,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629459f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 03:57:08, skipping insertion in model container [2022-07-12 03:57:08,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 03:57:08" (3/3) ... [2022-07-12 03:57:08,697 INFO L111 eAbstractionObserver]: Analyzing ICFG heapsort.i [2022-07-12 03:57:08,711 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 03:57:08,711 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 03:57:08,756 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 03:57:08,761 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@406a3274, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2d88e55d [2022-07-12 03:57:08,761 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 03:57:08,764 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) [2022-07-12 03:57:08,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 03:57:08,783 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:08,784 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:57:08,784 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:08,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:08,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1754201352, now seen corresponding path program 1 times [2022-07-12 03:57:08,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:08,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528156697] [2022-07-12 03:57:08,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:08,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:08,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:08,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:08,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:08,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528156697] [2022-07-12 03:57:08,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528156697] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 03:57:08,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 03:57:08,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 03:57:08,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173969619] [2022-07-12 03:57:08,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 03:57:08,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 03:57:08,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:09,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 03:57:09,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 03:57:09,012 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) [2022-07-12 03:57:09,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:09,096 INFO L93 Difference]: Finished difference Result 104 states and 193 transitions. [2022-07-12 03:57:09,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 03:57:09,103 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 [2022-07-12 03:57:09,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:09,109 INFO L225 Difference]: With dead ends: 104 [2022-07-12 03:57:09,110 INFO L226 Difference]: Without dead ends: 61 [2022-07-12 03:57:09,113 INFO L412 NwaCegarLoop]: 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 [2022-07-12 03:57:09,115 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 25 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:09,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 220 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 03:57:09,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-12 03:57:09,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 39. [2022-07-12 03:57:09,150 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) [2022-07-12 03:57:09,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 57 transitions. [2022-07-12 03:57:09,152 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 57 transitions. Word has length 11 [2022-07-12 03:57:09,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:09,152 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 57 transitions. [2022-07-12 03:57:09,152 INFO L496 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) [2022-07-12 03:57:09,152 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 57 transitions. [2022-07-12 03:57:09,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 03:57:09,153 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:09,153 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:57:09,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 03:57:09,154 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:09,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:09,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1749464583, now seen corresponding path program 1 times [2022-07-12 03:57:09,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:09,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612390480] [2022-07-12 03:57:09,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:09,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:09,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:09,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:09,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:09,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612390480] [2022-07-12 03:57:09,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612390480] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 03:57:09,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 03:57:09,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 03:57:09,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388733375] [2022-07-12 03:57:09,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 03:57:09,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 03:57:09,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:09,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 03:57:09,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 03:57:09,222 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) [2022-07-12 03:57:09,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:09,301 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2022-07-12 03:57:09,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 03:57:09,302 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 [2022-07-12 03:57:09,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:09,302 INFO L225 Difference]: With dead ends: 46 [2022-07-12 03:57:09,303 INFO L226 Difference]: Without dead ends: 44 [2022-07-12 03:57:09,304 INFO L412 NwaCegarLoop]: 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 [2022-07-12 03:57:09,305 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 17 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:09,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 137 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:57:09,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-12 03:57:09,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-07-12 03:57:09,314 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) [2022-07-12 03:57:09,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 60 transitions. [2022-07-12 03:57:09,314 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 60 transitions. Word has length 11 [2022-07-12 03:57:09,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:09,315 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 60 transitions. [2022-07-12 03:57:09,315 INFO L496 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) [2022-07-12 03:57:09,315 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 60 transitions. [2022-07-12 03:57:09,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 03:57:09,316 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:09,316 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:57:09,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 03:57:09,316 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:09,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:09,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1728015063, now seen corresponding path program 1 times [2022-07-12 03:57:09,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:09,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742477566] [2022-07-12 03:57:09,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:09,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:09,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:09,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:09,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:09,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742477566] [2022-07-12 03:57:09,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742477566] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 03:57:09,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 03:57:09,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 03:57:09,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276379094] [2022-07-12 03:57:09,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 03:57:09,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 03:57:09,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:09,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 03:57:09,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 03:57:09,381 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) [2022-07-12 03:57:09,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:09,528 INFO L93 Difference]: Finished difference Result 76 states and 111 transitions. [2022-07-12 03:57:09,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 03:57:09,529 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 [2022-07-12 03:57:09,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:09,531 INFO L225 Difference]: With dead ends: 76 [2022-07-12 03:57:09,532 INFO L226 Difference]: Without dead ends: 74 [2022-07-12 03:57:09,533 INFO L412 NwaCegarLoop]: 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 [2022-07-12 03:57:09,534 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 30 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:09,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 184 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:57:09,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-12 03:57:09,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2022-07-12 03:57:09,547 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) [2022-07-12 03:57:09,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 102 transitions. [2022-07-12 03:57:09,548 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 102 transitions. Word has length 11 [2022-07-12 03:57:09,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:09,548 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 102 transitions. [2022-07-12 03:57:09,548 INFO L496 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) [2022-07-12 03:57:09,548 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 102 transitions. [2022-07-12 03:57:09,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-12 03:57:09,549 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:09,549 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:57:09,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 03:57:09,549 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:09,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:09,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1885075524, now seen corresponding path program 1 times [2022-07-12 03:57:09,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:09,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422702648] [2022-07-12 03:57:09,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:09,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:09,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:09,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 03:57:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:09,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:09,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:09,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422702648] [2022-07-12 03:57:09,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422702648] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 03:57:09,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 03:57:09,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 03:57:09,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653944270] [2022-07-12 03:57:09,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 03:57:09,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 03:57:09,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:09,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 03:57:09,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-12 03:57:09,615 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) [2022-07-12 03:57:09,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:09,820 INFO L93 Difference]: Finished difference Result 102 states and 153 transitions. [2022-07-12 03:57:09,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 03:57:09,820 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 [2022-07-12 03:57:09,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:09,821 INFO L225 Difference]: With dead ends: 102 [2022-07-12 03:57:09,821 INFO L226 Difference]: Without dead ends: 100 [2022-07-12 03:57:09,822 INFO L412 NwaCegarLoop]: 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 [2022-07-12 03:57:09,823 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 43 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:09,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 213 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:57:09,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-12 03:57:09,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2022-07-12 03:57:09,837 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) [2022-07-12 03:57:09,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 148 transitions. [2022-07-12 03:57:09,839 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 148 transitions. Word has length 16 [2022-07-12 03:57:09,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:09,839 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 148 transitions. [2022-07-12 03:57:09,839 INFO L496 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) [2022-07-12 03:57:09,839 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 148 transitions. [2022-07-12 03:57:09,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-12 03:57:09,840 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:09,840 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:57:09,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 03:57:09,841 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:09,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:09,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1503713061, now seen corresponding path program 1 times [2022-07-12 03:57:09,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:09,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613726465] [2022-07-12 03:57:09,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:09,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:09,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:09,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 03:57:09,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:09,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:09,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:09,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613726465] [2022-07-12 03:57:09,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613726465] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 03:57:09,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 03:57:09,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 03:57:09,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215409649] [2022-07-12 03:57:09,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 03:57:09,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 03:57:09,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:09,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 03:57:09,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 03:57:09,907 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) [2022-07-12 03:57:09,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:09,961 INFO L93 Difference]: Finished difference Result 103 states and 153 transitions. [2022-07-12 03:57:09,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 03:57:09,961 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 [2022-07-12 03:57:09,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:09,964 INFO L225 Difference]: With dead ends: 103 [2022-07-12 03:57:09,964 INFO L226 Difference]: Without dead ends: 101 [2022-07-12 03:57:09,965 INFO L412 NwaCegarLoop]: 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 [2022-07-12 03:57:09,966 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 16 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:09,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 125 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 03:57:09,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-12 03:57:09,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-07-12 03:57:09,990 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) [2022-07-12 03:57:09,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 151 transitions. [2022-07-12 03:57:09,992 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 151 transitions. Word has length 16 [2022-07-12 03:57:09,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:09,993 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 151 transitions. [2022-07-12 03:57:09,994 INFO L496 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) [2022-07-12 03:57:09,994 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 151 transitions. [2022-07-12 03:57:09,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-12 03:57:09,998 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:10,001 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:57:10,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 03:57:10,003 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:10,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:10,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1518715221, now seen corresponding path program 1 times [2022-07-12 03:57:10,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:10,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915958030] [2022-07-12 03:57:10,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:10,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:10,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:10,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 03:57:10,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:10,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:10,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:10,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915958030] [2022-07-12 03:57:10,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915958030] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 03:57:10,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 03:57:10,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 03:57:10,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264804525] [2022-07-12 03:57:10,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 03:57:10,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 03:57:10,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:10,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 03:57:10,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-12 03:57:10,079 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) [2022-07-12 03:57:10,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:10,280 INFO L93 Difference]: Finished difference Result 155 states and 240 transitions. [2022-07-12 03:57:10,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 03:57:10,281 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 [2022-07-12 03:57:10,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:10,283 INFO L225 Difference]: With dead ends: 155 [2022-07-12 03:57:10,284 INFO L226 Difference]: Without dead ends: 153 [2022-07-12 03:57:10,284 INFO L412 NwaCegarLoop]: 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 [2022-07-12 03:57:10,287 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 64 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:10,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 248 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:57:10,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-12 03:57:10,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 137. [2022-07-12 03:57:10,344 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) [2022-07-12 03:57:10,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 214 transitions. [2022-07-12 03:57:10,346 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 214 transitions. Word has length 16 [2022-07-12 03:57:10,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:10,346 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 214 transitions. [2022-07-12 03:57:10,347 INFO L496 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) [2022-07-12 03:57:10,347 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 214 transitions. [2022-07-12 03:57:10,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-12 03:57:10,348 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:10,348 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:57:10,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 03:57:10,348 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:10,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:10,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1823085758, now seen corresponding path program 1 times [2022-07-12 03:57:10,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:10,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124247754] [2022-07-12 03:57:10,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:10,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:10,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 03:57:10,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:10,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:10,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:10,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124247754] [2022-07-12 03:57:10,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124247754] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 03:57:10,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 03:57:10,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 03:57:10,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193517391] [2022-07-12 03:57:10,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 03:57:10,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 03:57:10,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:10,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 03:57:10,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 03:57:10,371 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) [2022-07-12 03:57:10,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:10,408 INFO L93 Difference]: Finished difference Result 274 states and 436 transitions. [2022-07-12 03:57:10,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 03:57:10,408 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 [2022-07-12 03:57:10,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:10,410 INFO L225 Difference]: With dead ends: 274 [2022-07-12 03:57:10,410 INFO L226 Difference]: Without dead ends: 205 [2022-07-12 03:57:10,411 INFO L412 NwaCegarLoop]: 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 [2022-07-12 03:57:10,412 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:10,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 124 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 03:57:10,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-07-12 03:57:10,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2022-07-12 03:57:10,450 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) [2022-07-12 03:57:10,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 335 transitions. [2022-07-12 03:57:10,452 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 335 transitions. Word has length 16 [2022-07-12 03:57:10,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:10,452 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 335 transitions. [2022-07-12 03:57:10,453 INFO L496 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) [2022-07-12 03:57:10,453 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 335 transitions. [2022-07-12 03:57:10,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-12 03:57:10,453 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:10,453 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:57:10,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 03:57:10,454 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:10,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:10,454 INFO L85 PathProgramCache]: Analyzing trace with hash -2105521235, now seen corresponding path program 1 times [2022-07-12 03:57:10,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:10,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591315622] [2022-07-12 03:57:10,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:10,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:10,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:10,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 03:57:10,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:10,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 03:57:10,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:10,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591315622] [2022-07-12 03:57:10,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591315622] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 03:57:10,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 03:57:10,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 03:57:10,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847341428] [2022-07-12 03:57:10,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 03:57:10,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 03:57:10,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:10,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 03:57:10,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 03:57:10,494 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) [2022-07-12 03:57:10,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:10,576 INFO L93 Difference]: Finished difference Result 230 states and 359 transitions. [2022-07-12 03:57:10,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 03:57:10,576 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 [2022-07-12 03:57:10,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:10,578 INFO L225 Difference]: With dead ends: 230 [2022-07-12 03:57:10,578 INFO L226 Difference]: Without dead ends: 183 [2022-07-12 03:57:10,579 INFO L412 NwaCegarLoop]: 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 [2022-07-12 03:57:10,579 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 5 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:10,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 160 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 03:57:10,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-07-12 03:57:10,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2022-07-12 03:57:10,610 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) [2022-07-12 03:57:10,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 296 transitions. [2022-07-12 03:57:10,612 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 296 transitions. Word has length 16 [2022-07-12 03:57:10,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:10,613 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 296 transitions. [2022-07-12 03:57:10,613 INFO L496 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) [2022-07-12 03:57:10,613 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 296 transitions. [2022-07-12 03:57:10,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-12 03:57:10,614 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:10,614 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:57:10,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 03:57:10,614 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:10,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:10,615 INFO L85 PathProgramCache]: Analyzing trace with hash 186914675, now seen corresponding path program 1 times [2022-07-12 03:57:10,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:10,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124469745] [2022-07-12 03:57:10,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:10,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:10,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:10,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 03:57:10,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:10,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 03:57:10,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:10,651 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 03:57:10,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:10,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124469745] [2022-07-12 03:57:10,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124469745] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 03:57:10,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 03:57:10,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 03:57:10,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299242130] [2022-07-12 03:57:10,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 03:57:10,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 03:57:10,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:10,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 03:57:10,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 03:57:10,653 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) [2022-07-12 03:57:10,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:10,743 INFO L93 Difference]: Finished difference Result 217 states and 348 transitions. [2022-07-12 03:57:10,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 03:57:10,743 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 [2022-07-12 03:57:10,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:10,745 INFO L225 Difference]: With dead ends: 217 [2022-07-12 03:57:10,745 INFO L226 Difference]: Without dead ends: 215 [2022-07-12 03:57:10,745 INFO L412 NwaCegarLoop]: 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 [2022-07-12 03:57:10,746 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 43 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:10,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 293 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:57:10,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-07-12 03:57:10,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 197. [2022-07-12 03:57:10,765 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) [2022-07-12 03:57:10,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 317 transitions. [2022-07-12 03:57:10,767 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 317 transitions. Word has length 23 [2022-07-12 03:57:10,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:10,767 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 317 transitions. [2022-07-12 03:57:10,767 INFO L496 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) [2022-07-12 03:57:10,767 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 317 transitions. [2022-07-12 03:57:10,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-12 03:57:10,768 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:10,768 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:57:10,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 03:57:10,768 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:10,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:10,769 INFO L85 PathProgramCache]: Analyzing trace with hash 768784003, now seen corresponding path program 1 times [2022-07-12 03:57:10,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:10,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618998030] [2022-07-12 03:57:10,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:10,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:10,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:10,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 03:57:10,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:10,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 03:57:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:10,794 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 03:57:10,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:10,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618998030] [2022-07-12 03:57:10,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618998030] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 03:57:10,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 03:57:10,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 03:57:10,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784936630] [2022-07-12 03:57:10,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 03:57:10,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 03:57:10,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:10,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 03:57:10,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 03:57:10,796 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) [2022-07-12 03:57:10,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:10,997 INFO L93 Difference]: Finished difference Result 520 states and 854 transitions. [2022-07-12 03:57:10,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 03:57:10,998 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 [2022-07-12 03:57:10,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:11,000 INFO L225 Difference]: With dead ends: 520 [2022-07-12 03:57:11,000 INFO L226 Difference]: Without dead ends: 366 [2022-07-12 03:57:11,001 INFO L412 NwaCegarLoop]: 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 [2022-07-12 03:57:11,002 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 76 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:11,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 136 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:57:11,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-07-12 03:57:11,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 197. [2022-07-12 03:57:11,027 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) [2022-07-12 03:57:11,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 315 transitions. [2022-07-12 03:57:11,029 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 315 transitions. Word has length 25 [2022-07-12 03:57:11,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:11,029 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 315 transitions. [2022-07-12 03:57:11,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2022-07-12 03:57:11,029 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 315 transitions. [2022-07-12 03:57:11,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-12 03:57:11,030 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:11,030 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:57:11,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 03:57:11,030 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:11,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:11,031 INFO L85 PathProgramCache]: Analyzing trace with hash -299150037, now seen corresponding path program 1 times [2022-07-12 03:57:11,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:11,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013924580] [2022-07-12 03:57:11,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:11,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:11,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 03:57:11,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:11,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 03:57:11,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:11,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 03:57:11,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 03:57:11,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:11,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013924580] [2022-07-12 03:57:11,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013924580] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 03:57:11,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 03:57:11,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 03:57:11,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369741132] [2022-07-12 03:57:11,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 03:57:11,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 03:57:11,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:11,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 03:57:11,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 03:57:11,066 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) [2022-07-12 03:57:11,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:11,207 INFO L93 Difference]: Finished difference Result 291 states and 471 transitions. [2022-07-12 03:57:11,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 03:57:11,208 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 [2022-07-12 03:57:11,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:11,209 INFO L225 Difference]: With dead ends: 291 [2022-07-12 03:57:11,209 INFO L226 Difference]: Without dead ends: 289 [2022-07-12 03:57:11,210 INFO L412 NwaCegarLoop]: 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 [2022-07-12 03:57:11,210 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 24 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:11,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 183 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:57:11,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-07-12 03:57:11,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 269. [2022-07-12 03:57:11,240 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) [2022-07-12 03:57:11,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 441 transitions. [2022-07-12 03:57:11,241 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 441 transitions. Word has length 26 [2022-07-12 03:57:11,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:11,242 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 441 transitions. [2022-07-12 03:57:11,242 INFO L496 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) [2022-07-12 03:57:11,242 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 441 transitions. [2022-07-12 03:57:11,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-12 03:57:11,243 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:11,243 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 03:57:11,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 03:57:11,243 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:11,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:11,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1714235681, now seen corresponding path program 1 times [2022-07-12 03:57:11,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:11,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42630536] [2022-07-12 03:57:11,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:11,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:11,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:11,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 03:57:11,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:11,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 03:57:11,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:11,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-12 03:57:11,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:11,299 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 03:57:11,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:11,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42630536] [2022-07-12 03:57:11,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42630536] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 03:57:11,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 03:57:11,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 03:57:11,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186512937] [2022-07-12 03:57:11,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 03:57:11,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 03:57:11,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:11,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 03:57:11,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 03:57:11,300 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) [2022-07-12 03:57:11,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:11,429 INFO L93 Difference]: Finished difference Result 317 states and 516 transitions. [2022-07-12 03:57:11,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 03:57:11,430 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 [2022-07-12 03:57:11,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:11,434 INFO L225 Difference]: With dead ends: 317 [2022-07-12 03:57:11,434 INFO L226 Difference]: Without dead ends: 315 [2022-07-12 03:57:11,434 INFO L412 NwaCegarLoop]: 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 [2022-07-12 03:57:11,435 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 71 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:11,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 197 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:57:11,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-07-12 03:57:11,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 287. [2022-07-12 03:57:11,476 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) [2022-07-12 03:57:11,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 470 transitions. [2022-07-12 03:57:11,479 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 470 transitions. Word has length 28 [2022-07-12 03:57:11,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:11,480 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 470 transitions. [2022-07-12 03:57:11,480 INFO L496 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) [2022-07-12 03:57:11,480 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 470 transitions. [2022-07-12 03:57:11,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-12 03:57:11,481 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:11,481 INFO L195 NwaCegarLoop]: 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] [2022-07-12 03:57:11,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-12 03:57:11,482 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:11,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:11,482 INFO L85 PathProgramCache]: Analyzing trace with hash 523331784, now seen corresponding path program 1 times [2022-07-12 03:57:11,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:11,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881534736] [2022-07-12 03:57:11,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:11,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:11,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 03:57:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:11,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 03:57:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:11,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 03:57:11,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:11,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-12 03:57:11,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:11,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-12 03:57:11,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:11,543 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-12 03:57:11,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:11,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881534736] [2022-07-12 03:57:11,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881534736] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 03:57:11,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 03:57:11,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 03:57:11,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406629999] [2022-07-12 03:57:11,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 03:57:11,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 03:57:11,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:11,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 03:57:11,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-12 03:57:11,545 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) [2022-07-12 03:57:11,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:11,692 INFO L93 Difference]: Finished difference Result 329 states and 527 transitions. [2022-07-12 03:57:11,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 03:57:11,692 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 [2022-07-12 03:57:11,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:11,694 INFO L225 Difference]: With dead ends: 329 [2022-07-12 03:57:11,694 INFO L226 Difference]: Without dead ends: 327 [2022-07-12 03:57:11,694 INFO L412 NwaCegarLoop]: 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 [2022-07-12 03:57:11,695 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 34 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:11,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 194 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:57:11,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-07-12 03:57:11,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 291. [2022-07-12 03:57:11,740 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) [2022-07-12 03:57:11,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 473 transitions. [2022-07-12 03:57:11,742 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 473 transitions. Word has length 38 [2022-07-12 03:57:11,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:11,744 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 473 transitions. [2022-07-12 03:57:11,744 INFO L496 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) [2022-07-12 03:57:11,744 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 473 transitions. [2022-07-12 03:57:11,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-12 03:57:11,745 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:11,745 INFO L195 NwaCegarLoop]: 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] [2022-07-12 03:57:11,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-12 03:57:11,745 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:11,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:11,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1856149802, now seen corresponding path program 1 times [2022-07-12 03:57:11,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:11,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619585584] [2022-07-12 03:57:11,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:11,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:11,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:11,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 03:57:11,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:11,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 03:57:11,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:11,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 03:57:11,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:11,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-12 03:57:11,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:11,792 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 03:57:11,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:11,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619585584] [2022-07-12 03:57:11,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619585584] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 03:57:11,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 03:57:11,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 03:57:11,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147940685] [2022-07-12 03:57:11,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 03:57:11,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 03:57:11,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:11,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 03:57:11,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-12 03:57:11,795 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) [2022-07-12 03:57:11,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:11,901 INFO L93 Difference]: Finished difference Result 297 states and 478 transitions. [2022-07-12 03:57:11,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 03:57:11,901 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 [2022-07-12 03:57:11,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:11,903 INFO L225 Difference]: With dead ends: 297 [2022-07-12 03:57:11,903 INFO L226 Difference]: Without dead ends: 295 [2022-07-12 03:57:11,904 INFO L412 NwaCegarLoop]: 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 [2022-07-12 03:57:11,904 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 29 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:11,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 103 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:57:11,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-07-12 03:57:11,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2022-07-12 03:57:11,933 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) [2022-07-12 03:57:11,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 476 transitions. [2022-07-12 03:57:11,935 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 476 transitions. Word has length 38 [2022-07-12 03:57:11,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:11,935 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 476 transitions. [2022-07-12 03:57:11,935 INFO L496 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) [2022-07-12 03:57:11,935 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 476 transitions. [2022-07-12 03:57:11,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-12 03:57:11,936 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:11,936 INFO L195 NwaCegarLoop]: 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] [2022-07-12 03:57:11,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-12 03:57:11,936 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:11,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:11,937 INFO L85 PathProgramCache]: Analyzing trace with hash 2019762676, now seen corresponding path program 1 times [2022-07-12 03:57:11,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:11,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209241140] [2022-07-12 03:57:11,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:11,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:11,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 03:57:11,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:11,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 03:57:11,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:11,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 03:57:11,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:11,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-12 03:57:11,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:11,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-12 03:57:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:11,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-12 03:57:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:12,005 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-12 03:57:12,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:12,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209241140] [2022-07-12 03:57:12,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209241140] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 03:57:12,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 03:57:12,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 03:57:12,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568093870] [2022-07-12 03:57:12,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 03:57:12,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 03:57:12,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:12,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 03:57:12,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-12 03:57:12,007 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) [2022-07-12 03:57:12,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:12,122 INFO L93 Difference]: Finished difference Result 329 states and 525 transitions. [2022-07-12 03:57:12,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 03:57:12,122 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 [2022-07-12 03:57:12,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:12,124 INFO L225 Difference]: With dead ends: 329 [2022-07-12 03:57:12,124 INFO L226 Difference]: Without dead ends: 327 [2022-07-12 03:57:12,124 INFO L412 NwaCegarLoop]: 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 [2022-07-12 03:57:12,125 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 42 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:12,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 243 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:57:12,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-07-12 03:57:12,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 174. [2022-07-12 03:57:12,144 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) [2022-07-12 03:57:12,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 260 transitions. [2022-07-12 03:57:12,145 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 260 transitions. Word has length 50 [2022-07-12 03:57:12,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:12,146 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 260 transitions. [2022-07-12 03:57:12,146 INFO L496 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) [2022-07-12 03:57:12,146 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 260 transitions. [2022-07-12 03:57:12,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-12 03:57:12,147 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:12,147 INFO L195 NwaCegarLoop]: 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] [2022-07-12 03:57:12,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-12 03:57:12,147 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:12,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:12,147 INFO L85 PathProgramCache]: Analyzing trace with hash -2077570128, now seen corresponding path program 1 times [2022-07-12 03:57:12,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:12,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316800892] [2022-07-12 03:57:12,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:12,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:12,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:12,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 03:57:12,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:12,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 03:57:12,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:12,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-12 03:57:12,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:12,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-12 03:57:12,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:12,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-12 03:57:12,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:12,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-12 03:57:12,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:12,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-12 03:57:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:12,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-12 03:57:12,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:12,201 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-12 03:57:12,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:12,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316800892] [2022-07-12 03:57:12,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316800892] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:57:12,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89025132] [2022-07-12 03:57:12,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:12,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:12,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:57:12,205 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) [2022-07-12 03:57:12,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 03:57:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:12,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 03:57:12,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:57:12,503 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-12 03:57:12,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 03:57:12,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89025132] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 03:57:12,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 03:57:12,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2022-07-12 03:57:12,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817809024] [2022-07-12 03:57:12,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 03:57:12,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 03:57:12,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:12,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 03:57:12,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-12 03:57:12,509 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) [2022-07-12 03:57:12,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:12,739 INFO L93 Difference]: Finished difference Result 505 states and 801 transitions. [2022-07-12 03:57:12,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 03:57:12,740 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 [2022-07-12 03:57:12,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:12,741 INFO L225 Difference]: With dead ends: 505 [2022-07-12 03:57:12,741 INFO L226 Difference]: Without dead ends: 335 [2022-07-12 03:57:12,742 INFO L412 NwaCegarLoop]: 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 [2022-07-12 03:57:12,742 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 35 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:12,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 171 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:57:12,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-07-12 03:57:12,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 311. [2022-07-12 03:57:12,793 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) [2022-07-12 03:57:12,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 507 transitions. [2022-07-12 03:57:12,795 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 507 transitions. Word has length 58 [2022-07-12 03:57:12,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:12,795 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 507 transitions. [2022-07-12 03:57:12,795 INFO L496 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) [2022-07-12 03:57:12,796 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 507 transitions. [2022-07-12 03:57:12,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-12 03:57:12,797 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:12,797 INFO L195 NwaCegarLoop]: 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] [2022-07-12 03:57:12,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-12 03:57:13,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-12 03:57:13,014 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:13,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:13,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1244619342, now seen corresponding path program 1 times [2022-07-12 03:57:13,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:13,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358551069] [2022-07-12 03:57:13,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:13,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:13,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:13,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 03:57:13,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:13,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 03:57:13,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:13,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 03:57:13,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:13,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-12 03:57:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:13,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-12 03:57:13,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:13,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-12 03:57:13,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:13,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-12 03:57:13,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:13,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-12 03:57:13,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:13,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-12 03:57:13,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:13,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-12 03:57:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:13,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-12 03:57:13,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:13,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-12 03:57:13,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:13,097 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-07-12 03:57:13,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:13,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358551069] [2022-07-12 03:57:13,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358551069] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:57:13,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014515693] [2022-07-12 03:57:13,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:13,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:13,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:57:13,099 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) [2022-07-12 03:57:13,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 03:57:13,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:13,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 03:57:13,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:57:13,496 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2022-07-12 03:57:13,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 03:57:13,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014515693] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 03:57:13,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 03:57:13,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-07-12 03:57:13,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660418617] [2022-07-12 03:57:13,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 03:57:13,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 03:57:13,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:13,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 03:57:13,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-07-12 03:57:13,501 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) [2022-07-12 03:57:13,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:13,855 INFO L93 Difference]: Finished difference Result 579 states and 926 transitions. [2022-07-12 03:57:13,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 03:57:13,855 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 [2022-07-12 03:57:13,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:13,857 INFO L225 Difference]: With dead ends: 579 [2022-07-12 03:57:13,858 INFO L226 Difference]: Without dead ends: 303 [2022-07-12 03:57:13,859 INFO L412 NwaCegarLoop]: 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 [2022-07-12 03:57:13,859 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 29 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:13,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 189 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 03:57:13,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-07-12 03:57:13,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 267. [2022-07-12 03:57:13,916 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) [2022-07-12 03:57:13,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 423 transitions. [2022-07-12 03:57:13,918 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 423 transitions. Word has length 80 [2022-07-12 03:57:13,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:13,918 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 423 transitions. [2022-07-12 03:57:13,918 INFO L496 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) [2022-07-12 03:57:13,918 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 423 transitions. [2022-07-12 03:57:13,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-12 03:57:13,920 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:13,920 INFO L195 NwaCegarLoop]: 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] [2022-07-12 03:57:13,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 03:57:14,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-12 03:57:14,136 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:14,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:14,136 INFO L85 PathProgramCache]: Analyzing trace with hash 293720688, now seen corresponding path program 1 times [2022-07-12 03:57:14,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:14,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209648724] [2022-07-12 03:57:14,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:14,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:14,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 03:57:14,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:14,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 03:57:14,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:14,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 03:57:14,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:14,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-12 03:57:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:14,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-12 03:57:14,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:14,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-12 03:57:14,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:14,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-12 03:57:14,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:14,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-12 03:57:14,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:14,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-12 03:57:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:14,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-12 03:57:14,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:14,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-12 03:57:14,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:14,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-12 03:57:14,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:14,186 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-07-12 03:57:14,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:14,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209648724] [2022-07-12 03:57:14,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209648724] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:57:14,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247859744] [2022-07-12 03:57:14,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:14,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:14,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:57:14,188 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) [2022-07-12 03:57:14,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 03:57:14,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:14,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 03:57:14,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:57:14,469 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2022-07-12 03:57:14,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 03:57:14,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247859744] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 03:57:14,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 03:57:14,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2022-07-12 03:57:14,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634794385] [2022-07-12 03:57:14,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 03:57:14,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 03:57:14,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:14,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 03:57:14,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-07-12 03:57:14,471 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) [2022-07-12 03:57:14,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:14,685 INFO L93 Difference]: Finished difference Result 497 states and 780 transitions. [2022-07-12 03:57:14,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 03:57:14,686 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 [2022-07-12 03:57:14,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:14,687 INFO L225 Difference]: With dead ends: 497 [2022-07-12 03:57:14,687 INFO L226 Difference]: Without dead ends: 221 [2022-07-12 03:57:14,688 INFO L412 NwaCegarLoop]: 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 [2022-07-12 03:57:14,689 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 20 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:14,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 176 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 03:57:14,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-07-12 03:57:14,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 210. [2022-07-12 03:57:14,720 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) [2022-07-12 03:57:14,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 323 transitions. [2022-07-12 03:57:14,721 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 323 transitions. Word has length 80 [2022-07-12 03:57:14,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:14,722 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 323 transitions. [2022-07-12 03:57:14,722 INFO L496 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) [2022-07-12 03:57:14,722 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 323 transitions. [2022-07-12 03:57:14,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-12 03:57:14,725 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:14,725 INFO L195 NwaCegarLoop]: 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] [2022-07-12 03:57:14,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 03:57:14,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-12 03:57:14,949 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:14,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:14,949 INFO L85 PathProgramCache]: Analyzing trace with hash -493164145, now seen corresponding path program 1 times [2022-07-12 03:57:14,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:14,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019204778] [2022-07-12 03:57:14,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:14,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:14,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:14,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 03:57:14,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:14,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 03:57:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:14,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 03:57:14,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:14,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-12 03:57:14,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:14,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-12 03:57:14,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:14,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-12 03:57:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:14,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-12 03:57:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:14,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-12 03:57:14,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:15,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-12 03:57:15,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:15,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-12 03:57:15,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:15,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-12 03:57:15,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:15,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-07-12 03:57:15,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:15,006 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2022-07-12 03:57:15,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:15,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019204778] [2022-07-12 03:57:15,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019204778] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:57:15,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415150633] [2022-07-12 03:57:15,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:15,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:15,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:57:15,008 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) [2022-07-12 03:57:15,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 03:57:15,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:15,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 03:57:15,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:57:15,090 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-07-12 03:57:15,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:57:15,168 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-07-12 03:57:15,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415150633] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:57:15,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:57:15,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2022-07-12 03:57:15,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812063780] [2022-07-12 03:57:15,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:57:15,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 03:57:15,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:15,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 03:57:15,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-07-12 03:57:15,187 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) [2022-07-12 03:57:16,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:16,278 INFO L93 Difference]: Finished difference Result 512 states and 779 transitions. [2022-07-12 03:57:16,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-12 03:57:16,279 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 [2022-07-12 03:57:16,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:16,281 INFO L225 Difference]: With dead ends: 512 [2022-07-12 03:57:16,281 INFO L226 Difference]: Without dead ends: 342 [2022-07-12 03:57:16,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=419, Invalid=1221, Unknown=0, NotChecked=0, Total=1640 [2022-07-12 03:57:16,283 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 192 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 644 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 1754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 644 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:16,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 433 Invalid, 1754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [644 Valid, 1110 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 03:57:16,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-07-12 03:57:16,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 228. [2022-07-12 03:57:16,334 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) [2022-07-12 03:57:16,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 349 transitions. [2022-07-12 03:57:16,336 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 349 transitions. Word has length 85 [2022-07-12 03:57:16,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:16,336 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 349 transitions. [2022-07-12 03:57:16,337 INFO L496 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) [2022-07-12 03:57:16,337 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 349 transitions. [2022-07-12 03:57:16,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-12 03:57:16,343 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:16,343 INFO L195 NwaCegarLoop]: 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] [2022-07-12 03:57:16,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 03:57:16,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:16,560 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:16,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:16,561 INFO L85 PathProgramCache]: Analyzing trace with hash -539919791, now seen corresponding path program 1 times [2022-07-12 03:57:16,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:16,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578098196] [2022-07-12 03:57:16,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:16,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:16,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:16,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 03:57:16,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:16,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 03:57:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:16,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 03:57:16,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:16,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-12 03:57:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:16,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-12 03:57:16,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:16,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-12 03:57:16,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:16,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-12 03:57:16,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:16,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-12 03:57:16,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:16,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-12 03:57:16,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:16,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-12 03:57:16,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:16,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-12 03:57:16,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:16,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-12 03:57:16,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:16,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-12 03:57:16,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:16,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-12 03:57:16,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:16,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-12 03:57:16,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:16,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-12 03:57:16,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:16,640 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 32 proven. 20 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-07-12 03:57:16,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:16,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578098196] [2022-07-12 03:57:16,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578098196] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:57:16,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330578423] [2022-07-12 03:57:16,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:16,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:16,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:57:16,642 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) [2022-07-12 03:57:16,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 03:57:16,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:16,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 03:57:16,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:57:16,986 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 153 proven. 7 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2022-07-12 03:57:16,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:57:17,170 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 44 proven. 8 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-07-12 03:57:17,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330578423] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:57:17,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:57:17,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-07-12 03:57:17,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918775843] [2022-07-12 03:57:17,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:57:17,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 03:57:17,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:17,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 03:57:17,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-07-12 03:57:17,173 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) [2022-07-12 03:57:27,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:27,912 INFO L93 Difference]: Finished difference Result 1355 states and 2162 transitions. [2022-07-12 03:57:27,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-07-12 03:57:27,912 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 [2022-07-12 03:57:27,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:27,916 INFO L225 Difference]: With dead ends: 1355 [2022-07-12 03:57:27,916 INFO L226 Difference]: Without dead ends: 935 [2022-07-12 03:57:27,922 INFO L412 NwaCegarLoop]: 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 [2022-07-12 03:57:27,922 INFO L413 NwaCegarLoop]: 649 mSDtfsCounter, 1053 mSDsluCounter, 2065 mSDsCounter, 0 mSdLazyCounter, 9840 mSolverCounterSat, 3370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 2714 SdHoareTripleChecker+Invalid, 13210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3370 IncrementalHoareTripleChecker+Valid, 9840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:27,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1057 Valid, 2714 Invalid, 13210 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3370 Valid, 9840 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-07-12 03:57:27,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2022-07-12 03:57:27,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 364. [2022-07-12 03:57:27,991 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) [2022-07-12 03:57:27,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 567 transitions. [2022-07-12 03:57:27,993 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 567 transitions. Word has length 107 [2022-07-12 03:57:27,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:27,994 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 567 transitions. [2022-07-12 03:57:27,994 INFO L496 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) [2022-07-12 03:57:27,994 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 567 transitions. [2022-07-12 03:57:27,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-12 03:57:27,995 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:27,995 INFO L195 NwaCegarLoop]: 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] [2022-07-12 03:57:28,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 03:57:28,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:28,224 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:28,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:28,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1988686597, now seen corresponding path program 1 times [2022-07-12 03:57:28,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:28,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558261117] [2022-07-12 03:57:28,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:28,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:28,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:28,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 03:57:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:28,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 03:57:28,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:28,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 03:57:28,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:28,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-12 03:57:28,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:28,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-12 03:57:28,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:28,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-12 03:57:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:28,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-12 03:57:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:28,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-12 03:57:28,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:28,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-12 03:57:28,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:28,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-12 03:57:28,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:28,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-12 03:57:28,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:28,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-12 03:57:28,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:28,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-12 03:57:28,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:28,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-12 03:57:28,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:28,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-12 03:57:28,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:28,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-12 03:57:28,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:28,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-12 03:57:28,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:28,332 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-07-12 03:57:28,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:28,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558261117] [2022-07-12 03:57:28,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558261117] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:57:28,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060277264] [2022-07-12 03:57:28,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:28,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:28,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:57:28,334 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) [2022-07-12 03:57:28,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 03:57:28,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:28,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 03:57:28,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:57:28,546 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-07-12 03:57:28,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:57:28,699 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-07-12 03:57:28,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060277264] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:57:28,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:57:28,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-07-12 03:57:28,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074924320] [2022-07-12 03:57:28,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:57:28,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 03:57:28,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:28,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 03:57:28,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-07-12 03:57:28,701 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) [2022-07-12 03:57:29,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:29,986 INFO L93 Difference]: Finished difference Result 755 states and 1189 transitions. [2022-07-12 03:57:29,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-12 03:57:29,986 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 [2022-07-12 03:57:29,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:29,989 INFO L225 Difference]: With dead ends: 755 [2022-07-12 03:57:29,989 INFO L226 Difference]: Without dead ends: 632 [2022-07-12 03:57:29,990 INFO L412 NwaCegarLoop]: 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 [2022-07-12 03:57:29,991 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 366 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 1328 mSolverCounterSat, 1022 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 2350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1022 IncrementalHoareTripleChecker+Valid, 1328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:29,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 660 Invalid, 2350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1022 Valid, 1328 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-12 03:57:29,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-07-12 03:57:30,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 361. [2022-07-12 03:57:30,053 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) [2022-07-12 03:57:30,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 558 transitions. [2022-07-12 03:57:30,054 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 558 transitions. Word has length 112 [2022-07-12 03:57:30,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:30,055 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 558 transitions. [2022-07-12 03:57:30,055 INFO L496 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) [2022-07-12 03:57:30,055 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 558 transitions. [2022-07-12 03:57:30,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-07-12 03:57:30,056 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:30,056 INFO L195 NwaCegarLoop]: 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] [2022-07-12 03:57:30,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 03:57:30,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:30,273 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:30,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:30,273 INFO L85 PathProgramCache]: Analyzing trace with hash 2043931853, now seen corresponding path program 1 times [2022-07-12 03:57:30,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:30,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267159283] [2022-07-12 03:57:30,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:30,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:30,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 03:57:30,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:30,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 03:57:30,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:30,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 03:57:30,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:30,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-12 03:57:30,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:30,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-12 03:57:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:30,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-12 03:57:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:30,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-12 03:57:30,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:30,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-12 03:57:30,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:30,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-12 03:57:30,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:30,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-12 03:57:30,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:30,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-12 03:57:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:30,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-12 03:57:30,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:30,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-12 03:57:30,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:30,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-12 03:57:30,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:30,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-12 03:57:30,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:30,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-12 03:57:30,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:30,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-07-12 03:57:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:30,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-07-12 03:57:30,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:30,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-07-12 03:57:30,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:30,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-07-12 03:57:30,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:30,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-07-12 03:57:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:30,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-07-12 03:57:30,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:30,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-12 03:57:30,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:30,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-07-12 03:57:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:30,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 73 proven. 13 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-07-12 03:57:30,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:30,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267159283] [2022-07-12 03:57:30,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267159283] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:57:30,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611807923] [2022-07-12 03:57:30,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:30,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:30,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:57:30,355 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) [2022-07-12 03:57:30,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 03:57:30,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:30,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 03:57:30,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:57:30,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 491 proven. 15 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2022-07-12 03:57:30,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:57:30,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 69 proven. 17 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-07-12 03:57:30,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611807923] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:57:30,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:57:30,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-07-12 03:57:30,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406510462] [2022-07-12 03:57:30,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:57:30,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 03:57:30,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:30,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 03:57:30,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-07-12 03:57:30,917 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) [2022-07-12 03:57:33,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:33,818 INFO L93 Difference]: Finished difference Result 943 states and 1482 transitions. [2022-07-12 03:57:33,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-12 03:57:33,819 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 [2022-07-12 03:57:33,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:33,822 INFO L225 Difference]: With dead ends: 943 [2022-07-12 03:57:33,822 INFO L226 Difference]: Without dead ends: 695 [2022-07-12 03:57:33,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1015, Invalid=3815, Unknown=0, NotChecked=0, Total=4830 [2022-07-12 03:57:33,824 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 270 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 3652 mSolverCounterSat, 1039 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 1198 SdHoareTripleChecker+Invalid, 4691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1039 IncrementalHoareTripleChecker+Valid, 3652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:33,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 1198 Invalid, 4691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1039 Valid, 3652 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-12 03:57:33,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-07-12 03:57:33,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 547. [2022-07-12 03:57:33,949 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) [2022-07-12 03:57:33,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 878 transitions. [2022-07-12 03:57:33,951 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 878 transitions. Word has length 151 [2022-07-12 03:57:33,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:33,951 INFO L495 AbstractCegarLoop]: Abstraction has 547 states and 878 transitions. [2022-07-12 03:57:33,952 INFO L496 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) [2022-07-12 03:57:33,952 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 878 transitions. [2022-07-12 03:57:33,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-07-12 03:57:33,953 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:33,953 INFO L195 NwaCegarLoop]: 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] [2022-07-12 03:57:33,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 03:57:34,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:34,171 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:34,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:34,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1363812597, now seen corresponding path program 1 times [2022-07-12 03:57:34,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:34,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321384528] [2022-07-12 03:57:34,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:34,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:34,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:34,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 03:57:34,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:34,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 03:57:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:34,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 03:57:34,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:34,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-12 03:57:34,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:34,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-12 03:57:34,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:34,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-12 03:57:34,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:34,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-12 03:57:34,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:34,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-12 03:57:34,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:34,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-12 03:57:34,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:34,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-12 03:57:34,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:34,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-12 03:57:34,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:34,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-12 03:57:34,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:34,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-12 03:57:34,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:34,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-12 03:57:34,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:34,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-12 03:57:34,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:34,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-12 03:57:34,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:34,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-07-12 03:57:34,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:34,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-07-12 03:57:34,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:34,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-07-12 03:57:34,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:34,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-07-12 03:57:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:34,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-07-12 03:57:34,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:34,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-07-12 03:57:34,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:34,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-12 03:57:34,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:34,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-07-12 03:57:34,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:34,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 73 proven. 13 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-07-12 03:57:34,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:34,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321384528] [2022-07-12 03:57:34,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321384528] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:57:34,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309803848] [2022-07-12 03:57:34,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:34,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:34,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:57:34,260 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) [2022-07-12 03:57:34,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 03:57:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:34,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 03:57:34,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:57:34,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 73 proven. 13 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-07-12 03:57:34,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:57:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 73 proven. 13 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-07-12 03:57:34,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309803848] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:57:34,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:57:34,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-07-12 03:57:34,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038986270] [2022-07-12 03:57:34,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:57:34,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 03:57:34,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:34,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 03:57:34,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-12 03:57:34,530 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) [2022-07-12 03:57:34,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:34,870 INFO L93 Difference]: Finished difference Result 591 states and 939 transitions. [2022-07-12 03:57:34,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 03:57:34,870 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 [2022-07-12 03:57:34,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:34,874 INFO L225 Difference]: With dead ends: 591 [2022-07-12 03:57:34,874 INFO L226 Difference]: Without dead ends: 519 [2022-07-12 03:57:34,875 INFO L412 NwaCegarLoop]: 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 [2022-07-12 03:57:34,875 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 45 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:34,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 249 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 03:57:34,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-07-12 03:57:34,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 489. [2022-07-12 03:57:34,986 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) [2022-07-12 03:57:34,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 771 transitions. [2022-07-12 03:57:34,989 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 771 transitions. Word has length 151 [2022-07-12 03:57:34,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:34,990 INFO L495 AbstractCegarLoop]: Abstraction has 489 states and 771 transitions. [2022-07-12 03:57:34,991 INFO L496 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) [2022-07-12 03:57:34,991 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 771 transitions. [2022-07-12 03:57:34,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-07-12 03:57:34,993 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 03:57:34,994 INFO L195 NwaCegarLoop]: 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] [2022-07-12 03:57:35,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 03:57:35,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-12 03:57:35,210 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 03:57:35,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 03:57:35,210 INFO L85 PathProgramCache]: Analyzing trace with hash 2090740703, now seen corresponding path program 2 times [2022-07-12 03:57:35,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 03:57:35,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401717367] [2022-07-12 03:57:35,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 03:57:35,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 03:57:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 03:57:35,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 03:57:35,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 03:57:35,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-12 03:57:35,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-12 03:57:35,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-12 03:57:35,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-12 03:57:35,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-12 03:57:35,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-12 03:57:35,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-12 03:57:35,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-12 03:57:35,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-07-12 03:57:35,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-12 03:57:35,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-12 03:57:35,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-07-12 03:57:35,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-07-12 03:57:35,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-07-12 03:57:35,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-07-12 03:57:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-07-12 03:57:35,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-07-12 03:57:35,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-12 03:57:35,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-12 03:57:35,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-07-12 03:57:35,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-07-12 03:57:35,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-07-12 03:57:35,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2022-07-12 03:57:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-07-12 03:57:35,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-07-12 03:57:35,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-07-12 03:57:35,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2022-07-12 03:57:35,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2022-07-12 03:57:35,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2022-07-12 03:57:35,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2022-07-12 03:57:35,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2022-07-12 03:57:35,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2022-07-12 03:57:35,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 03:57:35,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 70 proven. 49 refuted. 0 times theorem prover too weak. 2425 trivial. 0 not checked. [2022-07-12 03:57:35,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 03:57:35,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401717367] [2022-07-12 03:57:35,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401717367] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 03:57:35,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464374864] [2022-07-12 03:57:35,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 03:57:35,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 03:57:35,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 03:57:35,378 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) [2022-07-12 03:57:35,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 03:57:35,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 03:57:35,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 03:57:35,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 03:57:35,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 03:57:35,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 1243 proven. 33 refuted. 0 times theorem prover too weak. 1268 trivial. 0 not checked. [2022-07-12 03:57:35,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 03:57:36,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 123 proven. 35 refuted. 0 times theorem prover too weak. 2386 trivial. 0 not checked. [2022-07-12 03:57:36,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464374864] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 03:57:36,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 03:57:36,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 25 [2022-07-12 03:57:36,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770839739] [2022-07-12 03:57:36,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 03:57:36,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 03:57:36,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 03:57:36,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 03:57:36,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2022-07-12 03:57:36,087 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) [2022-07-12 03:57:43,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 03:57:43,432 INFO L93 Difference]: Finished difference Result 1646 states and 2663 transitions. [2022-07-12 03:57:43,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-07-12 03:57:43,434 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 [2022-07-12 03:57:43,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 03:57:43,435 INFO L225 Difference]: With dead ends: 1646 [2022-07-12 03:57:43,435 INFO L226 Difference]: Without dead ends: 0 [2022-07-12 03:57:43,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 632 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7586 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3283, Invalid=17309, Unknown=0, NotChecked=0, Total=20592 [2022-07-12 03:57:43,442 INFO L413 NwaCegarLoop]: 427 mSDtfsCounter, 564 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 5901 mSolverCounterSat, 2838 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 1539 SdHoareTripleChecker+Invalid, 8739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2838 IncrementalHoareTripleChecker+Valid, 5901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-07-12 03:57:43,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 1539 Invalid, 8739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2838 Valid, 5901 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-07-12 03:57:43,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-12 03:57:43,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-12 03:57:43,443 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) [2022-07-12 03:57:43,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-12 03:57:43,444 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 218 [2022-07-12 03:57:43,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 03:57:43,444 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-12 03:57:43,445 INFO L496 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) [2022-07-12 03:57:43,445 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-12 03:57:43,445 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-12 03:57:43,447 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-12 03:57:43,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-12 03:57:43,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-12 03:57:43,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-12 03:57:56,719 WARN L233 SmtUtils]: Spent 13.03s on a formula simplification. DAG size of input: 417 DAG size of output: 401 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)