./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_clnt.blast.01.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/openssl/s3_clnt.blast.01.i.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a94ea84ce989fbbbaf2c8eaba75d5160290d15621b4e8c8582440d0d85685d8d --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 11:33:21,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 11:33:21,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 11:33:21,548 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 11:33:21,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 11:33:21,549 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 11:33:21,550 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 11:33:21,552 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 11:33:21,553 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 11:33:21,554 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 11:33:21,555 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 11:33:21,556 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 11:33:21,557 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 11:33:21,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 11:33:21,558 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 11:33:21,559 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 11:33:21,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 11:33:21,571 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 11:33:21,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 11:33:21,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 11:33:21,581 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 11:33:21,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 11:33:21,583 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 11:33:21,584 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 11:33:21,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 11:33:21,587 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 11:33:21,590 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 11:33:21,591 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 11:33:21,591 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 11:33:21,592 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 11:33:21,593 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 11:33:21,593 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 11:33:21,602 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 11:33:21,603 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 11:33:21,603 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 11:33:21,604 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 11:33:21,604 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 11:33:21,605 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 11:33:21,605 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 11:33:21,605 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 11:33:21,606 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 11:33:21,607 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 11:33:21,609 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 11:33:21,638 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 11:33:21,638 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 11:33:21,638 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 11:33:21,638 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 11:33:21,639 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 11:33:21,639 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 11:33:21,640 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 11:33:21,640 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 11:33:21,640 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 11:33:21,640 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 11:33:21,640 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 11:33:21,640 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 11:33:21,641 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 11:33:21,641 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 11:33:21,641 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 11:33:21,641 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 11:33:21,641 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 11:33:21,641 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 11:33:21,642 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 11:33:21,642 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 11:33:21,642 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 11:33:21,642 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 11:33:21,642 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 11:33:21,642 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 11:33:21,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:33:21,643 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 11:33:21,643 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 11:33:21,643 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 11:33:21,643 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 11:33:21,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 11:33:21,644 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 11:33:21,644 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 11:33:21,644 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 11:33:21,644 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a94ea84ce989fbbbaf2c8eaba75d5160290d15621b4e8c8582440d0d85685d8d [2022-07-13 11:33:21,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 11:33:21,855 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 11:33:21,858 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 11:33:21,859 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 11:33:21,859 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 11:33:21,860 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_clnt.blast.01.i.cil-1.c [2022-07-13 11:33:21,912 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/605a006d0/816f03ad209c40f68821d664758e480d/FLAGce70eadaf [2022-07-13 11:33:22,491 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 11:33:22,492 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_clnt.blast.01.i.cil-1.c [2022-07-13 11:33:22,514 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/605a006d0/816f03ad209c40f68821d664758e480d/FLAGce70eadaf [2022-07-13 11:33:22,745 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/605a006d0/816f03ad209c40f68821d664758e480d [2022-07-13 11:33:22,747 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 11:33:22,748 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 11:33:22,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 11:33:22,749 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 11:33:22,752 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 11:33:22,752 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:33:22" (1/1) ... [2022-07-13 11:33:22,753 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e6c1e56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:33:22, skipping insertion in model container [2022-07-13 11:33:22,754 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:33:22" (1/1) ... [2022-07-13 11:33:22,759 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 11:33:22,796 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 11:33:23,120 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/openssl/s3_clnt.blast.01.i.cil-1.c[65523,65536] [2022-07-13 11:33:23,138 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:33:23,155 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 11:33:23,265 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/openssl/s3_clnt.blast.01.i.cil-1.c[65523,65536] [2022-07-13 11:33:23,272 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:33:23,286 INFO L208 MainTranslator]: Completed translation [2022-07-13 11:33:23,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:33:23 WrapperNode [2022-07-13 11:33:23,287 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 11:33:23,288 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 11:33:23,288 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 11:33:23,288 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 11:33:23,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:33:23" (1/1) ... [2022-07-13 11:33:23,327 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:33:23" (1/1) ... [2022-07-13 11:33:23,370 INFO L137 Inliner]: procedures = 31, calls = 217, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 724 [2022-07-13 11:33:23,370 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 11:33:23,371 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 11:33:23,371 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 11:33:23,371 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 11:33:23,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:33:23" (1/1) ... [2022-07-13 11:33:23,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:33:23" (1/1) ... [2022-07-13 11:33:23,385 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:33:23" (1/1) ... [2022-07-13 11:33:23,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:33:23" (1/1) ... [2022-07-13 11:33:23,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:33:23" (1/1) ... [2022-07-13 11:33:23,433 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:33:23" (1/1) ... [2022-07-13 11:33:23,444 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:33:23" (1/1) ... [2022-07-13 11:33:23,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 11:33:23,449 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 11:33:23,449 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 11:33:23,449 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 11:33:23,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:33:23" (1/1) ... [2022-07-13 11:33:23,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:33:23,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:33:23,500 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) [2022-07-13 11:33:23,519 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 [2022-07-13 11:33:23,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 11:33:23,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-13 11:33:23,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 11:33:23,541 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 11:33:23,541 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-13 11:33:23,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 11:33:23,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 11:33:23,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 11:33:23,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 11:33:23,690 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 11:33:23,692 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 11:33:23,724 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-13 11:33:26,544 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2022-07-13 11:33:26,544 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2022-07-13 11:33:26,545 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 11:33:26,550 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 11:33:26,551 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 11:33:26,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:33:26 BoogieIcfgContainer [2022-07-13 11:33:26,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 11:33:26,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 11:33:26,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 11:33:26,557 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 11:33:26,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 11:33:22" (1/3) ... [2022-07-13 11:33:26,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@566b6d86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:33:26, skipping insertion in model container [2022-07-13 11:33:26,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:33:23" (2/3) ... [2022-07-13 11:33:26,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@566b6d86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:33:26, skipping insertion in model container [2022-07-13 11:33:26,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:33:26" (3/3) ... [2022-07-13 11:33:26,560 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt.blast.01.i.cil-1.c [2022-07-13 11:33:26,571 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 11:33:26,571 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 11:33:26,619 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 11:33:26,625 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@31aa56d8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@45ade99f [2022-07-13 11:33:26,625 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 11:33:26,629 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 129 states have (on average 1.689922480620155) internal successors, (218), 130 states have internal predecessors, (218), 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) [2022-07-13 11:33:26,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-13 11:33:26,635 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:33:26,635 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:33:26,636 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:33:26,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:33:26,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1457703966, now seen corresponding path program 1 times [2022-07-13 11:33:26,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:33:26,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720468358] [2022-07-13 11:33:26,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:33:26,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:33:27,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:27,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:33:27,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:33:27,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720468358] [2022-07-13 11:33:27,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720468358] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:33:27,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:33:27,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:33:27,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51641238] [2022-07-13 11:33:27,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:33:27,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:33:27,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:33:27,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:33:27,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:33:27,275 INFO L87 Difference]: Start difference. First operand has 131 states, 129 states have (on average 1.689922480620155) internal successors, (218), 130 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:33:29,302 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:33:29,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:33:29,726 INFO L93 Difference]: Finished difference Result 365 states and 610 transitions. [2022-07-13 11:33:29,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:33:29,729 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-13 11:33:29,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:33:29,739 INFO L225 Difference]: With dead ends: 365 [2022-07-13 11:33:29,739 INFO L226 Difference]: Without dead ends: 208 [2022-07-13 11:33:29,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:33:29,745 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 143 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:33:29,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 381 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 235 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-07-13 11:33:29,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-07-13 11:33:29,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 138. [2022-07-13 11:33:29,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.5547445255474452) internal successors, (213), 137 states have internal predecessors, (213), 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) [2022-07-13 11:33:29,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 213 transitions. [2022-07-13 11:33:29,784 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 213 transitions. Word has length 24 [2022-07-13 11:33:29,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:33:29,784 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 213 transitions. [2022-07-13 11:33:29,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:33:29,785 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 213 transitions. [2022-07-13 11:33:29,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-13 11:33:29,786 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:33:29,786 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-13 11:33:29,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 11:33:29,787 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:33:29,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:33:29,787 INFO L85 PathProgramCache]: Analyzing trace with hash 2051399351, now seen corresponding path program 1 times [2022-07-13 11:33:29,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:33:29,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894476841] [2022-07-13 11:33:29,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:33:29,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:33:29,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:30,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:33:30,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:33:30,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894476841] [2022-07-13 11:33:30,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894476841] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:33:30,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:33:30,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:33:30,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656580649] [2022-07-13 11:33:30,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:33:30,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:33:30,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:33:30,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:33:30,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:33:30,028 INFO L87 Difference]: Start difference. First operand 138 states and 213 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:33:32,044 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:33:32,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:33:32,377 INFO L93 Difference]: Finished difference Result 363 states and 558 transitions. [2022-07-13 11:33:32,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:33:32,378 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-13 11:33:32,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:33:32,380 INFO L225 Difference]: With dead ends: 363 [2022-07-13 11:33:32,380 INFO L226 Difference]: Without dead ends: 232 [2022-07-13 11:33:32,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:33:32,382 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 109 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 44 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:33:32,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 270 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:33:32,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-07-13 11:33:32,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 163. [2022-07-13 11:33:32,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.5864197530864197) internal successors, (257), 162 states have internal predecessors, (257), 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) [2022-07-13 11:33:32,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 257 transitions. [2022-07-13 11:33:32,394 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 257 transitions. Word has length 25 [2022-07-13 11:33:32,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:33:32,395 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 257 transitions. [2022-07-13 11:33:32,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:33:32,395 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 257 transitions. [2022-07-13 11:33:32,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-13 11:33:32,397 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:33:32,397 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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] [2022-07-13 11:33:32,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 11:33:32,398 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:33:32,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:33:32,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1317317884, now seen corresponding path program 1 times [2022-07-13 11:33:32,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:33:32,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841868638] [2022-07-13 11:33:32,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:33:32,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:33:32,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:32,583 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-13 11:33:32,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:33:32,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841868638] [2022-07-13 11:33:32,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841868638] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:33:32,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:33:32,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:33:32,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821451090] [2022-07-13 11:33:32,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:33:32,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:33:32,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:33:32,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:33:32,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:33:32,587 INFO L87 Difference]: Start difference. First operand 163 states and 257 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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) [2022-07-13 11:33:34,598 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:33:34,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:33:34,758 INFO L93 Difference]: Finished difference Result 323 states and 508 transitions. [2022-07-13 11:33:34,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:33:34,759 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-13 11:33:34,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:33:34,760 INFO L225 Difference]: With dead ends: 323 [2022-07-13 11:33:34,760 INFO L226 Difference]: Without dead ends: 167 [2022-07-13 11:33:34,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:33:34,762 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 7 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:33:34,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 409 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:33:34,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-07-13 11:33:34,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2022-07-13 11:33:34,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.5757575757575757) internal successors, (260), 165 states have internal predecessors, (260), 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) [2022-07-13 11:33:34,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 260 transitions. [2022-07-13 11:33:34,778 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 260 transitions. Word has length 45 [2022-07-13 11:33:34,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:33:34,778 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 260 transitions. [2022-07-13 11:33:34,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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) [2022-07-13 11:33:34,778 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 260 transitions. [2022-07-13 11:33:34,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-13 11:33:34,780 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:33:34,780 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 11:33:34,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 11:33:34,781 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:33:34,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:33:34,781 INFO L85 PathProgramCache]: Analyzing trace with hash -419240430, now seen corresponding path program 1 times [2022-07-13 11:33:34,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:33:34,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143278471] [2022-07-13 11:33:34,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:33:34,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:33:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:34,984 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 11:33:34,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:33:34,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143278471] [2022-07-13 11:33:34,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143278471] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:33:34,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:33:34,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:33:34,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528705976] [2022-07-13 11:33:34,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:33:34,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:33:34,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:33:34,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:33:34,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:33:34,989 INFO L87 Difference]: Start difference. First operand 166 states and 260 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2022-07-13 11:33:35,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:33:35,013 INFO L93 Difference]: Finished difference Result 474 states and 748 transitions. [2022-07-13 11:33:35,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:33:35,013 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-13 11:33:35,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:33:35,015 INFO L225 Difference]: With dead ends: 474 [2022-07-13 11:33:35,015 INFO L226 Difference]: Without dead ends: 318 [2022-07-13 11:33:35,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:33:35,024 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 127 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:33:35,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 314 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:33:35,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-07-13 11:33:35,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 318. [2022-07-13 11:33:35,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 1.5646687697160884) internal successors, (496), 317 states have internal predecessors, (496), 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) [2022-07-13 11:33:35,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 496 transitions. [2022-07-13 11:33:35,052 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 496 transitions. Word has length 60 [2022-07-13 11:33:35,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:33:35,053 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 496 transitions. [2022-07-13 11:33:35,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2022-07-13 11:33:35,053 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 496 transitions. [2022-07-13 11:33:35,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-13 11:33:35,060 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:33:35,060 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 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, 1] [2022-07-13 11:33:35,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 11:33:35,061 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:33:35,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:33:35,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1241103267, now seen corresponding path program 1 times [2022-07-13 11:33:35,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:33:35,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948930223] [2022-07-13 11:33:35,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:33:35,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:33:35,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:35,274 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 11:33:35,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:33:35,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948930223] [2022-07-13 11:33:35,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948930223] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:33:35,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:33:35,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:33:35,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199351887] [2022-07-13 11:33:35,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:33:35,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:33:35,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:33:35,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:33:35,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:33:35,278 INFO L87 Difference]: Start difference. First operand 318 states and 496 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2022-07-13 11:33:37,289 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:33:37,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:33:37,336 INFO L93 Difference]: Finished difference Result 625 states and 983 transitions. [2022-07-13 11:33:37,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:33:37,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-07-13 11:33:37,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:33:37,339 INFO L225 Difference]: With dead ends: 625 [2022-07-13 11:33:37,339 INFO L226 Difference]: Without dead ends: 469 [2022-07-13 11:33:37,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:33:37,340 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 128 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:33:37,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 467 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-07-13 11:33:37,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-07-13 11:33:37,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 469. [2022-07-13 11:33:37,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 1.561965811965812) internal successors, (731), 468 states have internal predecessors, (731), 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) [2022-07-13 11:33:37,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 731 transitions. [2022-07-13 11:33:37,354 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 731 transitions. Word has length 75 [2022-07-13 11:33:37,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:33:37,354 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 731 transitions. [2022-07-13 11:33:37,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2022-07-13 11:33:37,355 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 731 transitions. [2022-07-13 11:33:37,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-13 11:33:37,356 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:33:37,356 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2022-07-13 11:33:37,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 11:33:37,356 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:33:37,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:33:37,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1310455098, now seen corresponding path program 1 times [2022-07-13 11:33:37,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:33:37,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252665384] [2022-07-13 11:33:37,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:33:37,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:33:37,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:37,600 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-13 11:33:37,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:33:37,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252665384] [2022-07-13 11:33:37,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252665384] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:33:37,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:33:37,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:33:37,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684501317] [2022-07-13 11:33:37,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:33:37,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:33:37,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:33:37,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:33:37,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:33:37,603 INFO L87 Difference]: Start difference. First operand 469 states and 731 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2022-07-13 11:33:39,619 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:33:39,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:33:39,917 INFO L93 Difference]: Finished difference Result 1203 states and 1853 transitions. [2022-07-13 11:33:39,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:33:39,919 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2022-07-13 11:33:39,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:33:39,922 INFO L225 Difference]: With dead ends: 1203 [2022-07-13 11:33:39,923 INFO L226 Difference]: Without dead ends: 744 [2022-07-13 11:33:39,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:33:39,924 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 110 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 41 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:33:39,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 270 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 210 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:33:39,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-07-13 11:33:39,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 535. [2022-07-13 11:33:39,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 1.5767790262172285) internal successors, (842), 534 states have internal predecessors, (842), 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) [2022-07-13 11:33:39,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 842 transitions. [2022-07-13 11:33:39,947 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 842 transitions. Word has length 93 [2022-07-13 11:33:39,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:33:39,949 INFO L495 AbstractCegarLoop]: Abstraction has 535 states and 842 transitions. [2022-07-13 11:33:39,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2022-07-13 11:33:39,949 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 842 transitions. [2022-07-13 11:33:39,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-13 11:33:39,951 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:33:39,951 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2022-07-13 11:33:39,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 11:33:39,952 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:33:39,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:33:39,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1810547741, now seen corresponding path program 1 times [2022-07-13 11:33:39,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:33:39,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469671314] [2022-07-13 11:33:39,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:33:39,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:33:40,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:40,170 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-13 11:33:40,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:33:40,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469671314] [2022-07-13 11:33:40,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469671314] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:33:40,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:33:40,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:33:40,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842905218] [2022-07-13 11:33:40,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:33:40,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:33:40,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:33:40,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:33:40,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:33:40,174 INFO L87 Difference]: Start difference. First operand 535 states and 842 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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) [2022-07-13 11:33:42,183 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:33:44,200 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:33:44,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:33:44,512 INFO L93 Difference]: Finished difference Result 1234 states and 1930 transitions. [2022-07-13 11:33:44,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:33:44,513 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-07-13 11:33:44,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:33:44,517 INFO L225 Difference]: With dead ends: 1234 [2022-07-13 11:33:44,518 INFO L226 Difference]: Without dead ends: 709 [2022-07-13 11:33:44,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:33:44,520 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 89 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:33:44,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 550 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 231 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-07-13 11:33:44,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-07-13 11:33:44,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 583. [2022-07-13 11:33:44,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 1.5841924398625429) internal successors, (922), 582 states have internal predecessors, (922), 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) [2022-07-13 11:33:44,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 922 transitions. [2022-07-13 11:33:44,535 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 922 transitions. Word has length 94 [2022-07-13 11:33:44,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:33:44,536 INFO L495 AbstractCegarLoop]: Abstraction has 583 states and 922 transitions. [2022-07-13 11:33:44,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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) [2022-07-13 11:33:44,536 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 922 transitions. [2022-07-13 11:33:44,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-13 11:33:44,542 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:33:44,542 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2022-07-13 11:33:44,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 11:33:44,542 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:33:44,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:33:44,543 INFO L85 PathProgramCache]: Analyzing trace with hash -556146853, now seen corresponding path program 1 times [2022-07-13 11:33:44,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:33:44,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902833305] [2022-07-13 11:33:44,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:33:44,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:33:44,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-13 11:33:44,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:33:44,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902833305] [2022-07-13 11:33:44,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902833305] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:33:44,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:33:44,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:33:44,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95106671] [2022-07-13 11:33:44,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:33:44,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:33:44,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:33:44,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:33:44,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:33:44,764 INFO L87 Difference]: Start difference. First operand 583 states and 922 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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) [2022-07-13 11:33:46,773 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:33:47,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:33:47,069 INFO L93 Difference]: Finished difference Result 1356 states and 2106 transitions. [2022-07-13 11:33:47,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:33:47,070 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-07-13 11:33:47,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:33:47,072 INFO L225 Difference]: With dead ends: 1356 [2022-07-13 11:33:47,073 INFO L226 Difference]: Without dead ends: 783 [2022-07-13 11:33:47,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:33:47,074 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 109 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:33:47,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 282 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:33:47,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2022-07-13 11:33:47,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 535. [2022-07-13 11:33:47,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 1.5655430711610487) internal successors, (836), 534 states have internal predecessors, (836), 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) [2022-07-13 11:33:47,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 836 transitions. [2022-07-13 11:33:47,094 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 836 transitions. Word has length 94 [2022-07-13 11:33:47,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:33:47,095 INFO L495 AbstractCegarLoop]: Abstraction has 535 states and 836 transitions. [2022-07-13 11:33:47,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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) [2022-07-13 11:33:47,095 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 836 transitions. [2022-07-13 11:33:47,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-13 11:33:47,096 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:33:47,096 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:33:47,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 11:33:47,097 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:33:47,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:33:47,097 INFO L85 PathProgramCache]: Analyzing trace with hash -2023275345, now seen corresponding path program 1 times [2022-07-13 11:33:47,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:33:47,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337214927] [2022-07-13 11:33:47,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:33:47,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:33:47,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:47,312 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-13 11:33:47,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:33:47,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337214927] [2022-07-13 11:33:47,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337214927] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:33:47,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:33:47,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:33:47,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22376645] [2022-07-13 11:33:47,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:33:47,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:33:47,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:33:47,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:33:47,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:33:47,317 INFO L87 Difference]: Start difference. First operand 535 states and 836 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2022-07-13 11:33:49,332 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:33:51,347 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:33:51,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:33:51,646 INFO L93 Difference]: Finished difference Result 1234 states and 1916 transitions. [2022-07-13 11:33:51,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:33:51,646 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2022-07-13 11:33:51,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:33:51,649 INFO L225 Difference]: With dead ends: 1234 [2022-07-13 11:33:51,649 INFO L226 Difference]: Without dead ends: 709 [2022-07-13 11:33:51,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:33:51,650 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 75 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:33:51,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 548 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 231 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-07-13 11:33:51,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-07-13 11:33:51,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 609. [2022-07-13 11:33:51,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 608 states have (on average 1.582236842105263) internal successors, (962), 608 states have internal predecessors, (962), 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) [2022-07-13 11:33:51,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 962 transitions. [2022-07-13 11:33:51,666 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 962 transitions. Word has length 109 [2022-07-13 11:33:51,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:33:51,666 INFO L495 AbstractCegarLoop]: Abstraction has 609 states and 962 transitions. [2022-07-13 11:33:51,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2022-07-13 11:33:51,666 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 962 transitions. [2022-07-13 11:33:51,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-13 11:33:51,668 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:33:51,668 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:33:51,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 11:33:51,668 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:33:51,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:33:51,669 INFO L85 PathProgramCache]: Analyzing trace with hash -2139131827, now seen corresponding path program 1 times [2022-07-13 11:33:51,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:33:51,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829164477] [2022-07-13 11:33:51,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:33:51,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:33:51,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:51,880 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-13 11:33:51,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:33:51,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829164477] [2022-07-13 11:33:51,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829164477] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:33:51,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:33:51,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:33:51,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59961371] [2022-07-13 11:33:51,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:33:51,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:33:51,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:33:51,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:33:51,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:33:51,883 INFO L87 Difference]: Start difference. First operand 609 states and 962 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2022-07-13 11:33:53,892 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:33:54,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:33:54,181 INFO L93 Difference]: Finished difference Result 1408 states and 2186 transitions. [2022-07-13 11:33:54,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:33:54,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2022-07-13 11:33:54,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:33:54,184 INFO L225 Difference]: With dead ends: 1408 [2022-07-13 11:33:54,184 INFO L226 Difference]: Without dead ends: 809 [2022-07-13 11:33:54,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:33:54,186 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 93 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:33:54,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 282 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:33:54,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-07-13 11:33:54,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 648. [2022-07-13 11:33:54,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 1.6027820710973726) internal successors, (1037), 647 states have internal predecessors, (1037), 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) [2022-07-13 11:33:54,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1037 transitions. [2022-07-13 11:33:54,203 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1037 transitions. Word has length 109 [2022-07-13 11:33:54,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:33:54,203 INFO L495 AbstractCegarLoop]: Abstraction has 648 states and 1037 transitions. [2022-07-13 11:33:54,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2022-07-13 11:33:54,203 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1037 transitions. [2022-07-13 11:33:54,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-13 11:33:54,205 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:33:54,205 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:33:54,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 11:33:54,205 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:33:54,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:33:54,206 INFO L85 PathProgramCache]: Analyzing trace with hash -61700687, now seen corresponding path program 1 times [2022-07-13 11:33:54,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:33:54,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5881742] [2022-07-13 11:33:54,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:33:54,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:33:54,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:54,402 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-13 11:33:54,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:33:54,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5881742] [2022-07-13 11:33:54,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5881742] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:33:54,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:33:54,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:33:54,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112564379] [2022-07-13 11:33:54,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:33:54,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:33:54,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:33:54,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:33:54,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:33:54,404 INFO L87 Difference]: Start difference. First operand 648 states and 1037 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2022-07-13 11:33:56,415 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:33:56,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:33:56,698 INFO L93 Difference]: Finished difference Result 1567 states and 2462 transitions. [2022-07-13 11:33:56,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:33:56,699 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2022-07-13 11:33:56,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:33:56,702 INFO L225 Difference]: With dead ends: 1567 [2022-07-13 11:33:56,702 INFO L226 Difference]: Without dead ends: 929 [2022-07-13 11:33:56,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:33:56,703 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 94 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 36 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:33:56,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 284 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 214 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:33:56,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2022-07-13 11:33:56,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 688. [2022-07-13 11:33:56,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 1.6055312954876273) internal successors, (1103), 687 states have internal predecessors, (1103), 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) [2022-07-13 11:33:56,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 1103 transitions. [2022-07-13 11:33:56,722 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 1103 transitions. Word has length 109 [2022-07-13 11:33:56,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:33:56,722 INFO L495 AbstractCegarLoop]: Abstraction has 688 states and 1103 transitions. [2022-07-13 11:33:56,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2022-07-13 11:33:56,723 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 1103 transitions. [2022-07-13 11:33:56,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-13 11:33:56,724 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:33:56,724 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:33:56,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 11:33:56,725 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:33:56,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:33:56,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1072258150, now seen corresponding path program 1 times [2022-07-13 11:33:56,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:33:56,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213291525] [2022-07-13 11:33:56,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:33:56,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:33:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:33:56,915 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-13 11:33:56,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:33:56,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213291525] [2022-07-13 11:33:56,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213291525] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:33:56,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:33:56,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:33:56,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845727840] [2022-07-13 11:33:56,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:33:56,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:33:56,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:33:56,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:33:56,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:33:56,917 INFO L87 Difference]: Start difference. First operand 688 states and 1103 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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) [2022-07-13 11:33:58,931 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:00,948 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:01,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:01,242 INFO L93 Difference]: Finished difference Result 1536 states and 2442 transitions. [2022-07-13 11:34:01,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:34:01,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2022-07-13 11:34:01,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:01,246 INFO L225 Difference]: With dead ends: 1536 [2022-07-13 11:34:01,246 INFO L226 Difference]: Without dead ends: 858 [2022-07-13 11:34:01,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:34:01,247 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 71 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:01,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 542 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 228 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-07-13 11:34:01,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2022-07-13 11:34:01,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 764. [2022-07-13 11:34:01,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 1.6133682830930538) internal successors, (1231), 763 states have internal predecessors, (1231), 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) [2022-07-13 11:34:01,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1231 transitions. [2022-07-13 11:34:01,265 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1231 transitions. Word has length 110 [2022-07-13 11:34:01,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:01,266 INFO L495 AbstractCegarLoop]: Abstraction has 764 states and 1231 transitions. [2022-07-13 11:34:01,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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) [2022-07-13 11:34:01,266 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1231 transitions. [2022-07-13 11:34:01,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-13 11:34:01,268 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:01,268 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:34:01,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 11:34:01,268 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:01,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:01,269 INFO L85 PathProgramCache]: Analyzing trace with hash 195821732, now seen corresponding path program 1 times [2022-07-13 11:34:01,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:01,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14305337] [2022-07-13 11:34:01,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:01,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:01,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:01,466 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-13 11:34:01,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:01,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14305337] [2022-07-13 11:34:01,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14305337] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:01,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:01,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:34:01,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756169145] [2022-07-13 11:34:01,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:01,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:34:01,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:01,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:34:01,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:34:01,468 INFO L87 Difference]: Start difference. First operand 764 states and 1231 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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) [2022-07-13 11:34:03,477 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:05,497 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:05,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:05,800 INFO L93 Difference]: Finished difference Result 1608 states and 2564 transitions. [2022-07-13 11:34:05,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:34:05,800 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2022-07-13 11:34:05,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:05,803 INFO L225 Difference]: With dead ends: 1608 [2022-07-13 11:34:05,803 INFO L226 Difference]: Without dead ends: 854 [2022-07-13 11:34:05,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:34:05,805 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 67 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:05,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 538 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 225 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-07-13 11:34:05,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2022-07-13 11:34:05,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 768. [2022-07-13 11:34:05,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 1.6101694915254237) internal successors, (1235), 767 states have internal predecessors, (1235), 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) [2022-07-13 11:34:05,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1235 transitions. [2022-07-13 11:34:05,823 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1235 transitions. Word has length 110 [2022-07-13 11:34:05,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:05,823 INFO L495 AbstractCegarLoop]: Abstraction has 768 states and 1235 transitions. [2022-07-13 11:34:05,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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) [2022-07-13 11:34:05,824 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1235 transitions. [2022-07-13 11:34:05,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-13 11:34:05,825 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:05,825 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:34:05,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 11:34:05,826 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:05,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:05,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1751530404, now seen corresponding path program 1 times [2022-07-13 11:34:05,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:05,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794093288] [2022-07-13 11:34:05,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:05,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:05,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:06,010 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-13 11:34:06,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:06,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794093288] [2022-07-13 11:34:06,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794093288] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:06,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:06,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:34:06,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033409928] [2022-07-13 11:34:06,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:06,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:34:06,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:06,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:34:06,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:34:06,013 INFO L87 Difference]: Start difference. First operand 768 states and 1235 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:34:08,022 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:10,042 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:10,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:10,277 INFO L93 Difference]: Finished difference Result 1610 states and 2581 transitions. [2022-07-13 11:34:10,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:34:10,278 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2022-07-13 11:34:10,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:10,281 INFO L225 Difference]: With dead ends: 1610 [2022-07-13 11:34:10,281 INFO L226 Difference]: Without dead ends: 852 [2022-07-13 11:34:10,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:34:10,282 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 38 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:10,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 496 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 146 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-07-13 11:34:10,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2022-07-13 11:34:10,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 808. [2022-07-13 11:34:10,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 1.614622057001239) internal successors, (1303), 807 states have internal predecessors, (1303), 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) [2022-07-13 11:34:10,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1303 transitions. [2022-07-13 11:34:10,302 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1303 transitions. Word has length 110 [2022-07-13 11:34:10,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:10,303 INFO L495 AbstractCegarLoop]: Abstraction has 808 states and 1303 transitions. [2022-07-13 11:34:10,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:34:10,303 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1303 transitions. [2022-07-13 11:34:10,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-13 11:34:10,305 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:10,305 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:34:10,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 11:34:10,305 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:10,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:10,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1695019773, now seen corresponding path program 1 times [2022-07-13 11:34:10,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:10,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808644365] [2022-07-13 11:34:10,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:10,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:10,482 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-13 11:34:10,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:10,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808644365] [2022-07-13 11:34:10,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808644365] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:10,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:10,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:34:10,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175581511] [2022-07-13 11:34:10,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:10,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:34:10,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:10,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:34:10,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:34:10,485 INFO L87 Difference]: Start difference. First operand 808 states and 1303 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:34:12,493 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:14,515 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:14,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:14,788 INFO L93 Difference]: Finished difference Result 1692 states and 2702 transitions. [2022-07-13 11:34:14,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:34:14,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-07-13 11:34:14,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:14,792 INFO L225 Difference]: With dead ends: 1692 [2022-07-13 11:34:14,792 INFO L226 Difference]: Without dead ends: 894 [2022-07-13 11:34:14,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:34:14,793 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 85 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:14,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 538 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 225 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-07-13 11:34:14,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2022-07-13 11:34:14,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 808. [2022-07-13 11:34:14,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 1.6121437422552665) internal successors, (1301), 807 states have internal predecessors, (1301), 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) [2022-07-13 11:34:14,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1301 transitions. [2022-07-13 11:34:14,812 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1301 transitions. Word has length 111 [2022-07-13 11:34:14,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:14,812 INFO L495 AbstractCegarLoop]: Abstraction has 808 states and 1301 transitions. [2022-07-13 11:34:14,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:34:14,812 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1301 transitions. [2022-07-13 11:34:14,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-13 11:34:14,814 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:14,814 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:34:14,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 11:34:14,814 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:14,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:14,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1277623167, now seen corresponding path program 1 times [2022-07-13 11:34:14,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:14,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941126066] [2022-07-13 11:34:14,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:14,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:14,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:14,979 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-13 11:34:14,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:14,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941126066] [2022-07-13 11:34:14,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941126066] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:14,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:14,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:34:14,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472945982] [2022-07-13 11:34:14,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:14,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:34:14,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:14,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:34:14,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:34:14,983 INFO L87 Difference]: Start difference. First operand 808 states and 1301 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2022-07-13 11:34:16,990 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:17,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:17,040 INFO L93 Difference]: Finished difference Result 1607 states and 2596 transitions. [2022-07-13 11:34:17,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:34:17,040 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-07-13 11:34:17,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:17,044 INFO L225 Difference]: With dead ends: 1607 [2022-07-13 11:34:17,044 INFO L226 Difference]: Without dead ends: 1094 [2022-07-13 11:34:17,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:34:17,045 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 126 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:17,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 474 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-07-13 11:34:17,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2022-07-13 11:34:17,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 1094. [2022-07-13 11:34:17,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 1.6120768526989937) internal successors, (1762), 1093 states have internal predecessors, (1762), 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) [2022-07-13 11:34:17,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1762 transitions. [2022-07-13 11:34:17,068 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1762 transitions. Word has length 111 [2022-07-13 11:34:17,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:17,068 INFO L495 AbstractCegarLoop]: Abstraction has 1094 states and 1762 transitions. [2022-07-13 11:34:17,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2022-07-13 11:34:17,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1762 transitions. [2022-07-13 11:34:17,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-13 11:34:17,071 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:17,071 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:34:17,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 11:34:17,071 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:17,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:17,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1514033431, now seen corresponding path program 1 times [2022-07-13 11:34:17,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:17,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071038435] [2022-07-13 11:34:17,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:17,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:17,233 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-13 11:34:17,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:17,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071038435] [2022-07-13 11:34:17,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071038435] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:17,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:17,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:34:17,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254500816] [2022-07-13 11:34:17,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:17,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:34:17,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:17,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:34:17,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:34:17,235 INFO L87 Difference]: Start difference. First operand 1094 states and 1762 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2022-07-13 11:34:19,245 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:19,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:19,302 INFO L93 Difference]: Finished difference Result 2177 states and 3515 transitions. [2022-07-13 11:34:19,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:34:19,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-07-13 11:34:19,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:19,306 INFO L225 Difference]: With dead ends: 2177 [2022-07-13 11:34:19,306 INFO L226 Difference]: Without dead ends: 1378 [2022-07-13 11:34:19,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:34:19,308 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 126 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:19,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 472 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-07-13 11:34:19,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2022-07-13 11:34:19,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1378. [2022-07-13 11:34:19,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 1.6122004357298474) internal successors, (2220), 1377 states have internal predecessors, (2220), 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) [2022-07-13 11:34:19,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 2220 transitions. [2022-07-13 11:34:19,336 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 2220 transitions. Word has length 113 [2022-07-13 11:34:19,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:19,337 INFO L495 AbstractCegarLoop]: Abstraction has 1378 states and 2220 transitions. [2022-07-13 11:34:19,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2022-07-13 11:34:19,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 2220 transitions. [2022-07-13 11:34:19,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-13 11:34:19,339 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:19,339 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:34:19,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-13 11:34:19,340 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:19,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:19,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1373484821, now seen corresponding path program 1 times [2022-07-13 11:34:19,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:19,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56482283] [2022-07-13 11:34:19,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:19,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:19,496 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-13 11:34:19,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:19,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56482283] [2022-07-13 11:34:19,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56482283] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:19,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:19,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 11:34:19,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733177375] [2022-07-13 11:34:19,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:19,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 11:34:19,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:19,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 11:34:19,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:34:19,498 INFO L87 Difference]: Start difference. First operand 1378 states and 2220 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2022-07-13 11:34:21,506 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:21,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:21,566 INFO L93 Difference]: Finished difference Result 2722 states and 4392 transitions. [2022-07-13 11:34:21,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 11:34:21,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-07-13 11:34:21,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:21,572 INFO L225 Difference]: With dead ends: 2722 [2022-07-13 11:34:21,572 INFO L226 Difference]: Without dead ends: 1639 [2022-07-13 11:34:21,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 11:34:21,574 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 130 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:21,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 473 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-07-13 11:34:21,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2022-07-13 11:34:21,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 1639. [2022-07-13 11:34:21,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1639 states, 1638 states have (on average 1.6111111111111112) internal successors, (2639), 1638 states have internal predecessors, (2639), 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) [2022-07-13 11:34:21,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1639 states to 1639 states and 2639 transitions. [2022-07-13 11:34:21,606 INFO L78 Accepts]: Start accepts. Automaton has 1639 states and 2639 transitions. Word has length 113 [2022-07-13 11:34:21,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:21,607 INFO L495 AbstractCegarLoop]: Abstraction has 1639 states and 2639 transitions. [2022-07-13 11:34:21,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2022-07-13 11:34:21,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1639 states and 2639 transitions. [2022-07-13 11:34:21,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-07-13 11:34:21,610 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:21,611 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 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, 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, 1] [2022-07-13 11:34:21,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-13 11:34:21,611 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:21,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:21,612 INFO L85 PathProgramCache]: Analyzing trace with hash -881311456, now seen corresponding path program 1 times [2022-07-13 11:34:21,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:21,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050746121] [2022-07-13 11:34:21,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:21,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:21,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:21,805 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 215 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-07-13 11:34:21,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:21,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050746121] [2022-07-13 11:34:21,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050746121] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:21,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:21,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:34:21,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789523578] [2022-07-13 11:34:21,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:21,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:34:21,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:21,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:34:21,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:34:21,807 INFO L87 Difference]: Start difference. First operand 1639 states and 2639 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:34:23,816 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:25,841 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:26,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:26,081 INFO L93 Difference]: Finished difference Result 3393 states and 5411 transitions. [2022-07-13 11:34:26,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:34:26,082 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2022-07-13 11:34:26,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:26,088 INFO L225 Difference]: With dead ends: 3393 [2022-07-13 11:34:26,088 INFO L226 Difference]: Without dead ends: 1764 [2022-07-13 11:34:26,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:34:26,091 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 44 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:26,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 507 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 156 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-07-13 11:34:26,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1764 states. [2022-07-13 11:34:26,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1764 to 1639. [2022-07-13 11:34:26,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1639 states, 1638 states have (on average 1.6080586080586081) internal successors, (2634), 1638 states have internal predecessors, (2634), 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) [2022-07-13 11:34:26,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1639 states to 1639 states and 2634 transitions. [2022-07-13 11:34:26,121 INFO L78 Accepts]: Start accepts. Automaton has 1639 states and 2634 transitions. Word has length 177 [2022-07-13 11:34:26,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:26,122 INFO L495 AbstractCegarLoop]: Abstraction has 1639 states and 2634 transitions. [2022-07-13 11:34:26,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:34:26,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1639 states and 2634 transitions. [2022-07-13 11:34:26,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-07-13 11:34:26,126 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:26,126 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 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, 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] [2022-07-13 11:34:26,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-13 11:34:26,126 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:26,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:26,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1122935132, now seen corresponding path program 2 times [2022-07-13 11:34:26,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:26,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337529294] [2022-07-13 11:34:26,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:26,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:26,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 231 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-13 11:34:26,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:26,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337529294] [2022-07-13 11:34:26,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337529294] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:26,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:26,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:34:26,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354367568] [2022-07-13 11:34:26,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:26,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:34:26,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:26,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:34:26,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:34:26,328 INFO L87 Difference]: Start difference. First operand 1639 states and 2634 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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) [2022-07-13 11:34:28,337 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:30,358 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:30,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:30,626 INFO L93 Difference]: Finished difference Result 3578 states and 5633 transitions. [2022-07-13 11:34:30,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:34:30,626 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2022-07-13 11:34:30,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:30,632 INFO L225 Difference]: With dead ends: 3578 [2022-07-13 11:34:30,632 INFO L226 Difference]: Without dead ends: 1949 [2022-07-13 11:34:30,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:34:30,634 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 110 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 40 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:30,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 300 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 203 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-07-13 11:34:30,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1949 states. [2022-07-13 11:34:30,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1949 to 1639. [2022-07-13 11:34:30,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1639 states, 1638 states have (on average 1.5879120879120878) internal successors, (2601), 1638 states have internal predecessors, (2601), 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) [2022-07-13 11:34:30,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1639 states to 1639 states and 2601 transitions. [2022-07-13 11:34:30,667 INFO L78 Accepts]: Start accepts. Automaton has 1639 states and 2601 transitions. Word has length 192 [2022-07-13 11:34:30,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:30,668 INFO L495 AbstractCegarLoop]: Abstraction has 1639 states and 2601 transitions. [2022-07-13 11:34:30,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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) [2022-07-13 11:34:30,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1639 states and 2601 transitions. [2022-07-13 11:34:30,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-07-13 11:34:30,672 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:30,672 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 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, 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] [2022-07-13 11:34:30,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-13 11:34:30,672 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:30,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:30,673 INFO L85 PathProgramCache]: Analyzing trace with hash -670431110, now seen corresponding path program 1 times [2022-07-13 11:34:30,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:30,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574715012] [2022-07-13 11:34:30,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:30,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:30,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:30,873 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-13 11:34:30,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:30,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574715012] [2022-07-13 11:34:30,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574715012] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:30,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:30,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:34:30,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849913977] [2022-07-13 11:34:30,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:30,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:34:30,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:30,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:34:30,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:34:30,876 INFO L87 Difference]: Start difference. First operand 1639 states and 2601 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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) [2022-07-13 11:34:32,885 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:34,902 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:35,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:35,115 INFO L93 Difference]: Finished difference Result 3388 states and 5330 transitions. [2022-07-13 11:34:35,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:34:35,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2022-07-13 11:34:35,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:35,133 INFO L225 Difference]: With dead ends: 3388 [2022-07-13 11:34:35,133 INFO L226 Difference]: Without dead ends: 1759 [2022-07-13 11:34:35,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:34:35,136 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 54 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:35,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 505 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 151 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-07-13 11:34:35,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2022-07-13 11:34:35,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1639. [2022-07-13 11:34:35,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1639 states, 1638 states have (on average 1.5848595848595848) internal successors, (2596), 1638 states have internal predecessors, (2596), 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) [2022-07-13 11:34:35,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1639 states to 1639 states and 2596 transitions. [2022-07-13 11:34:35,171 INFO L78 Accepts]: Start accepts. Automaton has 1639 states and 2596 transitions. Word has length 192 [2022-07-13 11:34:35,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:35,172 INFO L495 AbstractCegarLoop]: Abstraction has 1639 states and 2596 transitions. [2022-07-13 11:34:35,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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) [2022-07-13 11:34:35,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1639 states and 2596 transitions. [2022-07-13 11:34:35,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-07-13 11:34:35,176 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:35,176 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 5, 5, 4, 4, 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, 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] [2022-07-13 11:34:35,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-13 11:34:35,176 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:35,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:35,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1025877347, now seen corresponding path program 1 times [2022-07-13 11:34:35,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:35,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229142829] [2022-07-13 11:34:35,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:35,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:35,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:35,457 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-07-13 11:34:35,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:35,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229142829] [2022-07-13 11:34:35,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229142829] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:35,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:35,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:34:35,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607087419] [2022-07-13 11:34:35,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:35,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:34:35,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:35,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:34:35,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:34:35,460 INFO L87 Difference]: Start difference. First operand 1639 states and 2596 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 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) [2022-07-13 11:34:37,468 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:39,490 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:39,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:39,693 INFO L93 Difference]: Finished difference Result 3151 states and 4971 transitions. [2022-07-13 11:34:39,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:34:39,695 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2022-07-13 11:34:39,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:39,701 INFO L225 Difference]: With dead ends: 3151 [2022-07-13 11:34:39,701 INFO L226 Difference]: Without dead ends: 1807 [2022-07-13 11:34:39,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:34:39,707 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 30 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:39,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 474 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 132 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-07-13 11:34:39,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2022-07-13 11:34:39,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1729. [2022-07-13 11:34:39,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1728 states have (on average 1.5862268518518519) internal successors, (2741), 1728 states have internal predecessors, (2741), 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) [2022-07-13 11:34:39,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 2741 transitions. [2022-07-13 11:34:39,740 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 2741 transitions. Word has length 192 [2022-07-13 11:34:39,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:39,741 INFO L495 AbstractCegarLoop]: Abstraction has 1729 states and 2741 transitions. [2022-07-13 11:34:39,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 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) [2022-07-13 11:34:39,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 2741 transitions. [2022-07-13 11:34:39,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-07-13 11:34:39,745 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:39,745 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 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, 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] [2022-07-13 11:34:39,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-13 11:34:39,746 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:39,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:39,746 INFO L85 PathProgramCache]: Analyzing trace with hash 414977075, now seen corresponding path program 1 times [2022-07-13 11:34:39,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:39,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280930457] [2022-07-13 11:34:39,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:39,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:39,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:39,950 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-13 11:34:39,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:39,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280930457] [2022-07-13 11:34:39,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280930457] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:39,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:39,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:34:39,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814137342] [2022-07-13 11:34:39,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:39,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:34:39,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:39,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:34:39,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:34:39,953 INFO L87 Difference]: Start difference. First operand 1729 states and 2741 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 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) [2022-07-13 11:34:41,962 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:42,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:42,227 INFO L93 Difference]: Finished difference Result 3759 states and 5848 transitions. [2022-07-13 11:34:42,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:34:42,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 193 [2022-07-13 11:34:42,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:42,232 INFO L225 Difference]: With dead ends: 3759 [2022-07-13 11:34:42,232 INFO L226 Difference]: Without dead ends: 2040 [2022-07-13 11:34:42,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:34:42,235 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 116 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 40 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:42,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 304 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 210 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:34:42,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2022-07-13 11:34:42,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1729. [2022-07-13 11:34:42,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1728 states have (on average 1.5642361111111112) internal successors, (2703), 1728 states have internal predecessors, (2703), 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) [2022-07-13 11:34:42,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 2703 transitions. [2022-07-13 11:34:42,291 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 2703 transitions. Word has length 193 [2022-07-13 11:34:42,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:42,292 INFO L495 AbstractCegarLoop]: Abstraction has 1729 states and 2703 transitions. [2022-07-13 11:34:42,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 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) [2022-07-13 11:34:42,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 2703 transitions. [2022-07-13 11:34:42,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-07-13 11:34:42,296 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:42,296 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 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, 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] [2022-07-13 11:34:42,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-13 11:34:42,297 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:42,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:42,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1213611809, now seen corresponding path program 1 times [2022-07-13 11:34:42,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:42,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600859012] [2022-07-13 11:34:42,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:42,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:42,512 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-13 11:34:42,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:42,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600859012] [2022-07-13 11:34:42,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600859012] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:42,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:42,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:34:42,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055253478] [2022-07-13 11:34:42,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:42,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:34:42,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:42,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:34:42,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:34:42,514 INFO L87 Difference]: Start difference. First operand 1729 states and 2703 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 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) [2022-07-13 11:34:44,523 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:44,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:44,763 INFO L93 Difference]: Finished difference Result 3759 states and 5772 transitions. [2022-07-13 11:34:44,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:34:44,763 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2022-07-13 11:34:44,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:44,792 INFO L225 Difference]: With dead ends: 3759 [2022-07-13 11:34:44,792 INFO L226 Difference]: Without dead ends: 2040 [2022-07-13 11:34:44,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:34:44,794 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 114 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:44,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 282 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:34:44,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2022-07-13 11:34:44,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1729. [2022-07-13 11:34:44,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1728 states have (on average 1.5422453703703705) internal successors, (2665), 1728 states have internal predecessors, (2665), 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) [2022-07-13 11:34:44,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 2665 transitions. [2022-07-13 11:34:44,827 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 2665 transitions. Word has length 194 [2022-07-13 11:34:44,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:44,828 INFO L495 AbstractCegarLoop]: Abstraction has 1729 states and 2665 transitions. [2022-07-13 11:34:44,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 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) [2022-07-13 11:34:44,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 2665 transitions. [2022-07-13 11:34:44,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-07-13 11:34:44,832 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:44,832 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 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, 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] [2022-07-13 11:34:44,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-13 11:34:44,832 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:44,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:44,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1076763912, now seen corresponding path program 1 times [2022-07-13 11:34:44,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:44,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040507123] [2022-07-13 11:34:44,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:44,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:45,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:45,198 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 258 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-13 11:34:45,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:45,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040507123] [2022-07-13 11:34:45,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040507123] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:34:45,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:34:45,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:34:45,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900041473] [2022-07-13 11:34:45,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:34:45,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:34:45,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:45,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:34:45,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:34:45,200 INFO L87 Difference]: Start difference. First operand 1729 states and 2665 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 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) [2022-07-13 11:34:47,064 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:47,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:34:47,311 INFO L93 Difference]: Finished difference Result 3759 states and 5696 transitions. [2022-07-13 11:34:47,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:34:47,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2022-07-13 11:34:47,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:34:47,319 INFO L225 Difference]: With dead ends: 3759 [2022-07-13 11:34:47,319 INFO L226 Difference]: Without dead ends: 2040 [2022-07-13 11:34:47,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:34:47,321 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 112 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:34:47,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 282 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-13 11:34:47,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2022-07-13 11:34:47,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1729. [2022-07-13 11:34:47,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1728 states have (on average 1.5202546296296295) internal successors, (2627), 1728 states have internal predecessors, (2627), 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) [2022-07-13 11:34:47,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 2627 transitions. [2022-07-13 11:34:47,355 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 2627 transitions. Word has length 195 [2022-07-13 11:34:47,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:34:47,356 INFO L495 AbstractCegarLoop]: Abstraction has 1729 states and 2627 transitions. [2022-07-13 11:34:47,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 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) [2022-07-13 11:34:47,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 2627 transitions. [2022-07-13 11:34:47,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-07-13 11:34:47,360 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:34:47,360 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 5, 5, 4, 4, 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, 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, 1] [2022-07-13 11:34:47,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-13 11:34:47,361 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:34:47,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:34:47,361 INFO L85 PathProgramCache]: Analyzing trace with hash 569210709, now seen corresponding path program 1 times [2022-07-13 11:34:47,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:34:47,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800024490] [2022-07-13 11:34:47,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:47,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:34:47,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:47,599 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 301 proven. 1 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-07-13 11:34:47,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:34:47,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800024490] [2022-07-13 11:34:47,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800024490] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:34:47,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069927170] [2022-07-13 11:34:47,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:34:47,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:34:47,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:34:47,603 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) [2022-07-13 11:34:47,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 11:34:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:34:48,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 1624 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-13 11:34:48,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:34:48,742 INFO L356 Elim1Store]: treesize reduction 54, result has 44.3 percent of original size [2022-07-13 11:34:48,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 143 [2022-07-13 11:34:48,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 63 [2022-07-13 11:34:48,757 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-07-13 11:34:48,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-07-13 11:34:48,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2022-07-13 11:34:48,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-13 11:34:49,062 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-13 11:34:49,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-13 11:34:49,086 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-13 11:34:49,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-13 11:34:49,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-13 11:34:49,139 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 267 proven. 40 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-13 11:34:49,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:34:49,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2022-07-13 11:34:49,251 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 273 proven. 15 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-07-13 11:34:49,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069927170] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:34:49,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:34:49,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7] total 13 [2022-07-13 11:34:49,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886495311] [2022-07-13 11:34:49,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:34:49,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 11:34:49,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:34:49,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 11:34:49,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-07-13 11:34:49,254 INFO L87 Difference]: Start difference. First operand 1729 states and 2627 transitions. Second operand has 13 states, 13 states have (on average 14.461538461538462) internal successors, (188), 13 states have internal predecessors, (188), 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) [2022-07-13 11:34:51,265 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:53,299 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:55,320 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:57,345 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:34:59,363 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:35:01,389 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:35:03,407 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:35:05,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:35:05,841 INFO L93 Difference]: Finished difference Result 6090 states and 8963 transitions. [2022-07-13 11:35:05,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-13 11:35:05,842 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 14.461538461538462) internal successors, (188), 13 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2022-07-13 11:35:05,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:35:05,859 INFO L225 Difference]: With dead ends: 6090 [2022-07-13 11:35:05,859 INFO L226 Difference]: Without dead ends: 4371 [2022-07-13 11:35:05,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=1010, Unknown=0, NotChecked=0, Total=1260 [2022-07-13 11:35:05,863 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 786 mSDsluCounter, 2053 mSDsCounter, 0 mSdLazyCounter, 1891 mSolverCounterSat, 227 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 2298 SdHoareTripleChecker+Invalid, 2125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 1891 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:35:05,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [786 Valid, 2298 Invalid, 2125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1891 Invalid, 7 Unknown, 0 Unchecked, 16.1s Time] [2022-07-13 11:35:05,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2022-07-13 11:35:05,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 2818. [2022-07-13 11:35:05,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2818 states, 2817 states have (on average 1.511537096201633) internal successors, (4258), 2817 states have internal predecessors, (4258), 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) [2022-07-13 11:35:05,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2818 states to 2818 states and 4258 transitions. [2022-07-13 11:35:05,938 INFO L78 Accepts]: Start accepts. Automaton has 2818 states and 4258 transitions. Word has length 195 [2022-07-13 11:35:05,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:35:05,938 INFO L495 AbstractCegarLoop]: Abstraction has 2818 states and 4258 transitions. [2022-07-13 11:35:05,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 14.461538461538462) internal successors, (188), 13 states have internal predecessors, (188), 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) [2022-07-13 11:35:05,938 INFO L276 IsEmpty]: Start isEmpty. Operand 2818 states and 4258 transitions. [2022-07-13 11:35:05,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-07-13 11:35:05,943 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:35:05,944 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 4, 4, 3, 3, 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, 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, 1] [2022-07-13 11:35:05,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 11:35:06,159 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,SelfDestructingSolverStorable25 [2022-07-13 11:35:06,160 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:35:06,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:35:06,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1310571081, now seen corresponding path program 1 times [2022-07-13 11:35:06,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:35:06,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707199162] [2022-07-13 11:35:06,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:06,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:35:06,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:06,352 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 256 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-07-13 11:35:06,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:35:06,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707199162] [2022-07-13 11:35:06,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707199162] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:35:06,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:35:06,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:35:06,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977432388] [2022-07-13 11:35:06,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:35:06,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:35:06,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:35:06,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:35:06,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:35:06,355 INFO L87 Difference]: Start difference. First operand 2818 states and 4258 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:35:08,364 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:35:10,383 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:35:10,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:35:10,649 INFO L93 Difference]: Finished difference Result 5694 states and 8522 transitions. [2022-07-13 11:35:10,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:35:10,650 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2022-07-13 11:35:10,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:35:10,655 INFO L225 Difference]: With dead ends: 5694 [2022-07-13 11:35:10,655 INFO L226 Difference]: Without dead ends: 2886 [2022-07-13 11:35:10,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:35:10,658 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 38 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:35:10,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 487 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 146 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-07-13 11:35:10,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2886 states. [2022-07-13 11:35:10,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2886 to 2676. [2022-07-13 11:35:10,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2676 states, 2675 states have (on average 1.503177570093458) internal successors, (4021), 2675 states have internal predecessors, (4021), 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) [2022-07-13 11:35:10,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2676 states to 2676 states and 4021 transitions. [2022-07-13 11:35:10,720 INFO L78 Accepts]: Start accepts. Automaton has 2676 states and 4021 transitions. Word has length 195 [2022-07-13 11:35:10,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:35:10,720 INFO L495 AbstractCegarLoop]: Abstraction has 2676 states and 4021 transitions. [2022-07-13 11:35:10,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:35:10,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2676 states and 4021 transitions. [2022-07-13 11:35:10,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-07-13 11:35:10,724 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:35:10,725 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 5, 5, 4, 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, 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, 1] [2022-07-13 11:35:10,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-13 11:35:10,725 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:35:10,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:35:10,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1625501241, now seen corresponding path program 1 times [2022-07-13 11:35:10,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:35:10,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343741957] [2022-07-13 11:35:10,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:10,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:35:10,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 245 proven. 0 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-07-13 11:35:10,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:35:10,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343741957] [2022-07-13 11:35:10,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343741957] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:35:10,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:35:10,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:35:10,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503892870] [2022-07-13 11:35:10,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:35:10,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:35:10,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:35:10,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:35:10,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:35:10,924 INFO L87 Difference]: Start difference. First operand 2676 states and 4021 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 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) [2022-07-13 11:35:12,934 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:35:13,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:35:13,256 INFO L93 Difference]: Finished difference Result 5812 states and 8604 transitions. [2022-07-13 11:35:13,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:35:13,256 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 197 [2022-07-13 11:35:13,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:35:13,261 INFO L225 Difference]: With dead ends: 5812 [2022-07-13 11:35:13,261 INFO L226 Difference]: Without dead ends: 3146 [2022-07-13 11:35:13,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:35:13,264 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 106 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:35:13,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 282 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:35:13,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3146 states. [2022-07-13 11:35:13,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3146 to 2676. [2022-07-13 11:35:13,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2676 states, 2675 states have (on average 1.486355140186916) internal successors, (3976), 2675 states have internal predecessors, (3976), 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) [2022-07-13 11:35:13,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2676 states to 2676 states and 3976 transitions. [2022-07-13 11:35:13,314 INFO L78 Accepts]: Start accepts. Automaton has 2676 states and 3976 transitions. Word has length 197 [2022-07-13 11:35:13,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:35:13,315 INFO L495 AbstractCegarLoop]: Abstraction has 2676 states and 3976 transitions. [2022-07-13 11:35:13,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 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) [2022-07-13 11:35:13,315 INFO L276 IsEmpty]: Start isEmpty. Operand 2676 states and 3976 transitions. [2022-07-13 11:35:13,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-07-13 11:35:13,319 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:35:13,319 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 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, 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, 1] [2022-07-13 11:35:13,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-13 11:35:13,320 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:35:13,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:35:13,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1584226853, now seen corresponding path program 1 times [2022-07-13 11:35:13,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:35:13,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918958751] [2022-07-13 11:35:13,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:13,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:35:13,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:13,529 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 217 proven. 0 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2022-07-13 11:35:13,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:35:13,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918958751] [2022-07-13 11:35:13,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918958751] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:35:13,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:35:13,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:35:13,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680309582] [2022-07-13 11:35:13,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:35:13,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:35:13,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:35:13,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:35:13,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:35:13,533 INFO L87 Difference]: Start difference. First operand 2676 states and 3976 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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) [2022-07-13 11:35:15,563 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:35:15,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:35:15,843 INFO L93 Difference]: Finished difference Result 5812 states and 8514 transitions. [2022-07-13 11:35:15,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:35:15,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2022-07-13 11:35:15,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:35:15,849 INFO L225 Difference]: With dead ends: 5812 [2022-07-13 11:35:15,849 INFO L226 Difference]: Without dead ends: 3146 [2022-07-13 11:35:15,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:35:15,853 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 89 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:35:15,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 282 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:35:15,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3146 states. [2022-07-13 11:35:15,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3146 to 2676. [2022-07-13 11:35:16,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2676 states, 2675 states have (on average 1.4826168224299066) internal successors, (3966), 2675 states have internal predecessors, (3966), 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) [2022-07-13 11:35:16,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2676 states to 2676 states and 3966 transitions. [2022-07-13 11:35:16,012 INFO L78 Accepts]: Start accepts. Automaton has 2676 states and 3966 transitions. Word has length 199 [2022-07-13 11:35:16,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:35:16,012 INFO L495 AbstractCegarLoop]: Abstraction has 2676 states and 3966 transitions. [2022-07-13 11:35:16,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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) [2022-07-13 11:35:16,013 INFO L276 IsEmpty]: Start isEmpty. Operand 2676 states and 3966 transitions. [2022-07-13 11:35:16,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-07-13 11:35:16,017 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:35:16,017 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 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, 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, 1] [2022-07-13 11:35:16,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-13 11:35:16,017 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:35:16,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:35:16,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1834304025, now seen corresponding path program 1 times [2022-07-13 11:35:16,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:35:16,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323980201] [2022-07-13 11:35:16,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:16,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:35:16,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:16,329 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 217 proven. 0 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2022-07-13 11:35:16,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:35:16,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323980201] [2022-07-13 11:35:16,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323980201] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:35:16,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:35:16,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:35:16,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525929400] [2022-07-13 11:35:16,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:35:16,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:35:16,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:35:16,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:35:16,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:35:16,332 INFO L87 Difference]: Start difference. First operand 2676 states and 3966 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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) [2022-07-13 11:35:18,341 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:35:20,359 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:35:20,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:35:20,608 INFO L93 Difference]: Finished difference Result 5760 states and 8478 transitions. [2022-07-13 11:35:20,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:35:20,609 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2022-07-13 11:35:20,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:35:20,615 INFO L225 Difference]: With dead ends: 5760 [2022-07-13 11:35:20,615 INFO L226 Difference]: Without dead ends: 3094 [2022-07-13 11:35:20,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:35:20,619 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 41 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:35:20,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 498 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 170 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-07-13 11:35:20,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3094 states. [2022-07-13 11:35:20,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3094 to 2908. [2022-07-13 11:35:20,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2908 states, 2907 states have (on average 1.477124183006536) internal successors, (4294), 2907 states have internal predecessors, (4294), 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) [2022-07-13 11:35:20,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2908 states to 2908 states and 4294 transitions. [2022-07-13 11:35:20,696 INFO L78 Accepts]: Start accepts. Automaton has 2908 states and 4294 transitions. Word has length 199 [2022-07-13 11:35:20,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:35:20,696 INFO L495 AbstractCegarLoop]: Abstraction has 2908 states and 4294 transitions. [2022-07-13 11:35:20,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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) [2022-07-13 11:35:20,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2908 states and 4294 transitions. [2022-07-13 11:35:20,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-07-13 11:35:20,701 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:35:20,701 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 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, 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, 1] [2022-07-13 11:35:20,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-13 11:35:20,701 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:35:20,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:35:20,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1781391017, now seen corresponding path program 1 times [2022-07-13 11:35:20,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:35:20,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448472857] [2022-07-13 11:35:20,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:20,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:35:20,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:20,925 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 217 proven. 0 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2022-07-13 11:35:20,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:35:20,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448472857] [2022-07-13 11:35:20,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448472857] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:35:20,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:35:20,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:35:20,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068763932] [2022-07-13 11:35:20,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:35:20,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:35:20,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:35:20,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:35:20,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:35:20,927 INFO L87 Difference]: Start difference. First operand 2908 states and 4294 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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) [2022-07-13 11:35:22,938 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:35:24,958 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:35:25,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:35:25,244 INFO L93 Difference]: Finished difference Result 6383 states and 9374 transitions. [2022-07-13 11:35:25,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:35:25,244 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2022-07-13 11:35:25,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:35:25,248 INFO L225 Difference]: With dead ends: 6383 [2022-07-13 11:35:25,248 INFO L226 Difference]: Without dead ends: 3485 [2022-07-13 11:35:25,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:35:25,252 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 47 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:35:25,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 510 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 184 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-07-13 11:35:25,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3485 states. [2022-07-13 11:35:25,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3485 to 3228. [2022-07-13 11:35:25,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3228 states, 3227 states have (on average 1.4793926247288502) internal successors, (4774), 3227 states have internal predecessors, (4774), 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) [2022-07-13 11:35:25,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3228 states to 3228 states and 4774 transitions. [2022-07-13 11:35:25,338 INFO L78 Accepts]: Start accepts. Automaton has 3228 states and 4774 transitions. Word has length 199 [2022-07-13 11:35:25,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:35:25,338 INFO L495 AbstractCegarLoop]: Abstraction has 3228 states and 4774 transitions. [2022-07-13 11:35:25,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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) [2022-07-13 11:35:25,339 INFO L276 IsEmpty]: Start isEmpty. Operand 3228 states and 4774 transitions. [2022-07-13 11:35:25,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-07-13 11:35:25,344 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:35:25,344 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 5, 5, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:35:25,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-13 11:35:25,344 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:35:25,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:35:25,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1088911914, now seen corresponding path program 1 times [2022-07-13 11:35:25,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:35:25,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616338715] [2022-07-13 11:35:25,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:25,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:35:25,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:25,608 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 328 proven. 60 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-07-13 11:35:25,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:35:25,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616338715] [2022-07-13 11:35:25,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616338715] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:35:25,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698330340] [2022-07-13 11:35:25,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:25,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:35:25,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:35:25,612 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) [2022-07-13 11:35:25,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 11:35:26,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:26,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 1628 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 11:35:26,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:35:26,854 INFO L356 Elim1Store]: treesize reduction 54, result has 44.3 percent of original size [2022-07-13 11:35:26,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 143 [2022-07-13 11:35:26,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 63 [2022-07-13 11:35:26,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-07-13 11:35:26,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-07-13 11:35:26,965 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-13 11:35:26,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-13 11:35:27,009 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-13 11:35:27,009 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-13 11:35:27,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-13 11:35:27,037 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-13 11:35:27,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-13 11:35:27,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-13 11:35:27,075 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 309 proven. 60 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-07-13 11:35:27,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:35:27,129 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 316 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-07-13 11:35:27,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698330340] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 11:35:27,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:35:27,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 11 [2022-07-13 11:35:27,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898839739] [2022-07-13 11:35:27,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:35:27,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:35:27,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:35:27,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:35:27,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-13 11:35:27,132 INFO L87 Difference]: Start difference. First operand 3228 states and 4774 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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) [2022-07-13 11:35:29,140 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:35:29,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:35:29,498 INFO L93 Difference]: Finished difference Result 7613 states and 11205 transitions. [2022-07-13 11:35:29,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:35:29,499 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2022-07-13 11:35:29,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:35:29,504 INFO L225 Difference]: With dead ends: 7613 [2022-07-13 11:35:29,504 INFO L226 Difference]: Without dead ends: 4395 [2022-07-13 11:35:29,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-07-13 11:35:29,507 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 96 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 22 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:35:29,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 510 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 225 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:35:29,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4395 states. [2022-07-13 11:35:29,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4395 to 3628. [2022-07-13 11:35:29,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3628 states, 3627 states have (on average 1.4656741108354012) internal successors, (5316), 3627 states have internal predecessors, (5316), 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) [2022-07-13 11:35:29,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3628 states to 3628 states and 5316 transitions. [2022-07-13 11:35:29,596 INFO L78 Accepts]: Start accepts. Automaton has 3628 states and 5316 transitions. Word has length 200 [2022-07-13 11:35:29,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:35:29,596 INFO L495 AbstractCegarLoop]: Abstraction has 3628 states and 5316 transitions. [2022-07-13 11:35:29,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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) [2022-07-13 11:35:29,596 INFO L276 IsEmpty]: Start isEmpty. Operand 3628 states and 5316 transitions. [2022-07-13 11:35:29,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-07-13 11:35:29,602 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:35:29,602 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 2, 2, 2, 2, 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, 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] [2022-07-13 11:35:29,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-13 11:35:29,820 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,SelfDestructingSolverStorable31 [2022-07-13 11:35:29,820 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:35:29,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:35:29,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1477348565, now seen corresponding path program 1 times [2022-07-13 11:35:29,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:35:29,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552497915] [2022-07-13 11:35:29,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:29,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:35:29,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:30,041 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 265 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-07-13 11:35:30,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:35:30,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552497915] [2022-07-13 11:35:30,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552497915] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:35:30,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:35:30,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:35:30,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035546118] [2022-07-13 11:35:30,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:35:30,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:35:30,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:35:30,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:35:30,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:35:30,043 INFO L87 Difference]: Start difference. First operand 3628 states and 5316 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 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) [2022-07-13 11:35:32,053 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:35:32,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:35:32,395 INFO L93 Difference]: Finished difference Result 7347 states and 10667 transitions. [2022-07-13 11:35:32,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:35:32,395 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 214 [2022-07-13 11:35:32,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:35:32,399 INFO L225 Difference]: With dead ends: 7347 [2022-07-13 11:35:32,399 INFO L226 Difference]: Without dead ends: 3729 [2022-07-13 11:35:32,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:35:32,402 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 113 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:35:32,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 278 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 11:35:32,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3729 states. [2022-07-13 11:35:32,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3729 to 3309. [2022-07-13 11:35:32,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3309 states, 3308 states have (on average 1.4410519951632406) internal successors, (4767), 3308 states have internal predecessors, (4767), 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) [2022-07-13 11:35:32,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3309 states to 3309 states and 4767 transitions. [2022-07-13 11:35:32,485 INFO L78 Accepts]: Start accepts. Automaton has 3309 states and 4767 transitions. Word has length 214 [2022-07-13 11:35:32,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:35:32,485 INFO L495 AbstractCegarLoop]: Abstraction has 3309 states and 4767 transitions. [2022-07-13 11:35:32,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 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) [2022-07-13 11:35:32,486 INFO L276 IsEmpty]: Start isEmpty. Operand 3309 states and 4767 transitions. [2022-07-13 11:35:32,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-07-13 11:35:32,491 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:35:32,491 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 8, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:35:32,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-13 11:35:32,491 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:35:32,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:35:32,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1035956472, now seen corresponding path program 1 times [2022-07-13 11:35:32,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:35:32,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392003177] [2022-07-13 11:35:32,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:32,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:35:32,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:32,695 INFO L134 CoverageAnalysis]: Checked inductivity of 686 backedges. 416 proven. 0 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2022-07-13 11:35:32,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:35:32,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392003177] [2022-07-13 11:35:32,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392003177] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:35:32,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:35:32,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:35:32,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810301136] [2022-07-13 11:35:32,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:35:32,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:35:32,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:35:32,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:35:32,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:35:32,698 INFO L87 Difference]: Start difference. First operand 3309 states and 4767 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 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) [2022-07-13 11:35:34,707 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 11:35:35,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:35:35,018 INFO L93 Difference]: Finished difference Result 7020 states and 10027 transitions. [2022-07-13 11:35:35,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:35:35,018 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 219 [2022-07-13 11:35:35,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:35:35,022 INFO L225 Difference]: With dead ends: 7020 [2022-07-13 11:35:35,022 INFO L226 Difference]: Without dead ends: 3721 [2022-07-13 11:35:35,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:35:35,024 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 105 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:35:35,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 284 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 11:35:35,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3721 states. [2022-07-13 11:35:35,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3721 to 3309. [2022-07-13 11:35:35,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3309 states, 3308 states have (on average 1.4168681983071343) internal successors, (4687), 3308 states have internal predecessors, (4687), 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) [2022-07-13 11:35:35,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3309 states to 3309 states and 4687 transitions. [2022-07-13 11:35:35,088 INFO L78 Accepts]: Start accepts. Automaton has 3309 states and 4687 transitions. Word has length 219 [2022-07-13 11:35:35,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:35:35,089 INFO L495 AbstractCegarLoop]: Abstraction has 3309 states and 4687 transitions. [2022-07-13 11:35:35,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 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) [2022-07-13 11:35:35,089 INFO L276 IsEmpty]: Start isEmpty. Operand 3309 states and 4687 transitions. [2022-07-13 11:35:35,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-07-13 11:35:35,095 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:35:35,095 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 6, 6, 5, 5, 3, 3, 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, 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, 1, 1, 1, 1] [2022-07-13 11:35:35,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-13 11:35:35,095 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:35:35,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:35:35,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1993742684, now seen corresponding path program 1 times [2022-07-13 11:35:35,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:35:35,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071246419] [2022-07-13 11:35:35,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:35,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:35:36,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:37,569 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 2 proven. 282 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-07-13 11:35:37,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:35:37,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071246419] [2022-07-13 11:35:37,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071246419] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:35:37,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352629463] [2022-07-13 11:35:37,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:35:37,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:35:37,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:35:37,572 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) [2022-07-13 11:35:37,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 11:35:39,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:35:39,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 1766 conjuncts, 309 conjunts are in the unsatisfiable core [2022-07-13 11:35:39,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:35:39,856 INFO L190 IndexEqualityManager]: detected not equals via solver