./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/bitvector-regression/recHanoi03-1.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 5a58a565ed7a29809aaccd8966118196fec0a697f2fc6db04cc260beeab4df83 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 22:28:18,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 22:28:18,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 22:28:18,453 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 22:28:18,453 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 22:28:18,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 22:28:18,457 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 22:28:18,459 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 22:28:18,461 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 22:28:18,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 22:28:18,468 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 22:28:18,470 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 22:28:18,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 22:28:18,473 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 22:28:18,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 22:28:18,479 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 22:28:18,480 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 22:28:18,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 22:28:18,483 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 22:28:18,488 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 22:28:18,490 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 22:28:18,491 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 22:28:18,492 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 22:28:18,493 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 22:28:18,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 22:28:18,499 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 22:28:18,499 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 22:28:18,500 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 22:28:18,502 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 22:28:18,502 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 22:28:18,503 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 22:28:18,503 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 22:28:18,505 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 22:28:18,505 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 22:28:18,506 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 22:28:18,507 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 22:28:18,507 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 22:28:18,508 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 22:28:18,508 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 22:28:18,508 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 22:28:18,509 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 22:28:18,510 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 22:28:18,511 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 22:28:18,546 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 22:28:18,547 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 22:28:18,547 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 22:28:18,547 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 22:28:18,548 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 22:28:18,548 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 22:28:18,549 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 22:28:18,549 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 22:28:18,549 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 22:28:18,550 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 22:28:18,551 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 22:28:18,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 22:28:18,551 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 22:28:18,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 22:28:18,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 22:28:18,552 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 22:28:18,552 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 22:28:18,552 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 22:28:18,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 22:28:18,552 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 22:28:18,553 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 22:28:18,553 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 22:28:18,553 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 22:28:18,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 22:28:18,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:28:18,554 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 22:28:18,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 22:28:18,554 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 22:28:18,554 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 22:28:18,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 22:28:18,555 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 22:28:18,555 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 22:28:18,555 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 22:28:18,556 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a58a565ed7a29809aaccd8966118196fec0a697f2fc6db04cc260beeab4df83 [2022-07-20 22:28:18,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 22:28:18,807 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 22:28:18,810 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 22:28:18,811 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 22:28:18,811 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 22:28:18,812 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2022-07-20 22:28:18,871 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaeb3f95a/56128174da3c4a1b8073415eee1900ae/FLAG6645037aa [2022-07-20 22:28:19,239 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 22:28:19,240 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2022-07-20 22:28:19,244 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaeb3f95a/56128174da3c4a1b8073415eee1900ae/FLAG6645037aa [2022-07-20 22:28:19,255 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaeb3f95a/56128174da3c4a1b8073415eee1900ae [2022-07-20 22:28:19,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 22:28:19,258 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 22:28:19,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 22:28:19,260 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 22:28:19,266 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 22:28:19,267 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:28:19" (1/1) ... [2022-07-20 22:28:19,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cf5f6ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:19, skipping insertion in model container [2022-07-20 22:28:19,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:28:19" (1/1) ... [2022-07-20 22:28:19,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 22:28:19,289 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 22:28:19,425 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/bitvector-regression/recHanoi03-1.c[838,851] [2022-07-20 22:28:19,428 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:28:19,435 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 22:28:19,446 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/bitvector-regression/recHanoi03-1.c[838,851] [2022-07-20 22:28:19,447 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:28:19,456 INFO L208 MainTranslator]: Completed translation [2022-07-20 22:28:19,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:19 WrapperNode [2022-07-20 22:28:19,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 22:28:19,458 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 22:28:19,458 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 22:28:19,458 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 22:28:19,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:19" (1/1) ... [2022-07-20 22:28:19,469 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:19" (1/1) ... [2022-07-20 22:28:19,481 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 25 [2022-07-20 22:28:19,481 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 22:28:19,482 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 22:28:19,482 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 22:28:19,482 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 22:28:19,488 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:19" (1/1) ... [2022-07-20 22:28:19,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:19" (1/1) ... [2022-07-20 22:28:19,490 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:19" (1/1) ... [2022-07-20 22:28:19,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:19" (1/1) ... [2022-07-20 22:28:19,493 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:19" (1/1) ... [2022-07-20 22:28:19,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:19" (1/1) ... [2022-07-20 22:28:19,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:19" (1/1) ... [2022-07-20 22:28:19,496 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 22:28:19,497 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 22:28:19,497 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 22:28:19,497 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 22:28:19,504 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:19" (1/1) ... [2022-07-20 22:28:19,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:28:19,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:28:19,537 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) [2022-07-20 22:28:19,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 22:28:19,580 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2022-07-20 22:28:19,580 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2022-07-20 22:28:19,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 22:28:19,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 22:28:19,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 22:28:19,567 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 [2022-07-20 22:28:19,631 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 22:28:19,632 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 22:28:19,705 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 22:28:19,710 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 22:28:19,710 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-20 22:28:19,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:28:19 BoogieIcfgContainer [2022-07-20 22:28:19,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 22:28:19,714 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 22:28:19,714 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 22:28:19,718 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 22:28:19,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:28:19" (1/3) ... [2022-07-20 22:28:19,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f108e21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:28:19, skipping insertion in model container [2022-07-20 22:28:19,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:19" (2/3) ... [2022-07-20 22:28:19,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f108e21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:28:19, skipping insertion in model container [2022-07-20 22:28:19,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:28:19" (3/3) ... [2022-07-20 22:28:19,724 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi03-1.c [2022-07-20 22:28:19,736 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 22:28:19,737 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 22:28:19,791 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 22:28:19,797 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@22366f9d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@13d6ab11 [2022-07-20 22:28:19,798 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 22:28:19,802 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 22:28:19,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 22:28:19,809 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:28:19,809 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:28:19,810 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:28:19,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:28:19,815 INFO L85 PathProgramCache]: Analyzing trace with hash -2087939196, now seen corresponding path program 1 times [2022-07-20 22:28:19,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:28:19,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381826924] [2022-07-20 22:28:19,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:28:19,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:28:19,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-20 22:28:19,914 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-20 22:28:19,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-20 22:28:19,949 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-20 22:28:19,951 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-20 22:28:19,952 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-20 22:28:19,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 22:28:19,957 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-20 22:28:19,961 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-20 22:28:19,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:28:19 BoogieIcfgContainer [2022-07-20 22:28:19,988 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-20 22:28:19,990 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-20 22:28:19,990 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-20 22:28:19,991 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-20 22:28:19,991 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:28:19" (3/4) ... [2022-07-20 22:28:19,994 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-20 22:28:19,995 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-20 22:28:19,997 INFO L158 Benchmark]: Toolchain (without parser) took 737.78ms. Allocated memory was 98.6MB in the beginning and 119.5MB in the end (delta: 21.0MB). Free memory was 67.6MB in the beginning and 69.8MB in the end (delta: -2.2MB). Peak memory consumption was 15.7MB. Max. memory is 16.1GB. [2022-07-20 22:28:19,997 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 98.6MB. Free memory was 54.7MB in the beginning and 54.6MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-20 22:28:19,999 INFO L158 Benchmark]: CACSL2BoogieTranslator took 197.04ms. Allocated memory was 98.6MB in the beginning and 119.5MB in the end (delta: 21.0MB). Free memory was 67.4MB in the beginning and 95.6MB in the end (delta: -28.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-20 22:28:20,000 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.78ms. Allocated memory is still 119.5MB. Free memory was 95.6MB in the beginning and 94.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-20 22:28:20,004 INFO L158 Benchmark]: Boogie Preprocessor took 14.61ms. Allocated memory is still 119.5MB. Free memory was 94.2MB in the beginning and 93.1MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-20 22:28:20,004 INFO L158 Benchmark]: RCFGBuilder took 215.35ms. Allocated memory is still 119.5MB. Free memory was 93.1MB in the beginning and 84.5MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-20 22:28:20,006 INFO L158 Benchmark]: TraceAbstraction took 274.56ms. Allocated memory is still 119.5MB. Free memory was 83.7MB in the beginning and 70.1MB in the end (delta: 13.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-20 22:28:20,006 INFO L158 Benchmark]: Witness Printer took 5.25ms. Allocated memory is still 119.5MB. Free memory was 70.1MB in the beginning and 69.8MB in the end (delta: 247.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-20 22:28:20,013 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 98.6MB. Free memory was 54.7MB in the beginning and 54.6MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 197.04ms. Allocated memory was 98.6MB in the beginning and 119.5MB in the end (delta: 21.0MB). Free memory was 67.4MB in the beginning and 95.6MB in the end (delta: -28.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.78ms. Allocated memory is still 119.5MB. Free memory was 95.6MB in the beginning and 94.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 14.61ms. Allocated memory is still 119.5MB. Free memory was 94.2MB in the beginning and 93.1MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 215.35ms. Allocated memory is still 119.5MB. Free memory was 93.1MB in the beginning and 84.5MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 274.56ms. Allocated memory is still 119.5MB. Free memory was 83.7MB in the beginning and 70.1MB in the end (delta: 13.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 5.25ms. Allocated memory is still 119.5MB. Free memory was 70.1MB in the beginning and 69.8MB in the end (delta: 247.5kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 36]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of shiftLeft at line 33. Possible FailurePath: [L27] int n = __VERIFIER_nondet_int(); [L28] COND FALSE !(n < 1) VAL [n=1] [L31] CALL, EXPR hanoi(n) VAL [\old(n)=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L31] RET, EXPR hanoi(n) VAL [hanoi(n)=1, n=1] [L31] unsigned result = hanoi(n); [L33] COND FALSE !(result+1>0 && result+1 == 1< 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 -> 5a58a565ed7a29809aaccd8966118196fec0a697f2fc6db04cc260beeab4df83 [2022-07-20 22:28:22,572 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 22:28:22,590 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 22:28:22,592 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 22:28:22,593 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 22:28:22,594 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 22:28:22,596 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2022-07-20 22:28:22,656 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebef0fff1/0ce17fcd177741e1937841e7efb5c591/FLAGaf2575ef1 [2022-07-20 22:28:23,067 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 22:28:23,067 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2022-07-20 22:28:23,074 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebef0fff1/0ce17fcd177741e1937841e7efb5c591/FLAGaf2575ef1 [2022-07-20 22:28:23,093 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebef0fff1/0ce17fcd177741e1937841e7efb5c591 [2022-07-20 22:28:23,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 22:28:23,098 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 22:28:23,099 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 22:28:23,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 22:28:23,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 22:28:23,103 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:28:23" (1/1) ... [2022-07-20 22:28:23,105 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@464e577a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:23, skipping insertion in model container [2022-07-20 22:28:23,106 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:28:23" (1/1) ... [2022-07-20 22:28:23,111 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 22:28:23,125 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 22:28:23,296 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/bitvector-regression/recHanoi03-1.c[838,851] [2022-07-20 22:28:23,298 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:28:23,306 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 22:28:23,329 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/bitvector-regression/recHanoi03-1.c[838,851] [2022-07-20 22:28:23,330 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:28:23,363 INFO L208 MainTranslator]: Completed translation [2022-07-20 22:28:23,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:23 WrapperNode [2022-07-20 22:28:23,364 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 22:28:23,367 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 22:28:23,367 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 22:28:23,367 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 22:28:23,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:23" (1/1) ... [2022-07-20 22:28:23,380 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:23" (1/1) ... [2022-07-20 22:28:23,395 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2022-07-20 22:28:23,395 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 22:28:23,396 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 22:28:23,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 22:28:23,397 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 22:28:23,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:23" (1/1) ... [2022-07-20 22:28:23,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:23" (1/1) ... [2022-07-20 22:28:23,409 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:23" (1/1) ... [2022-07-20 22:28:23,410 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:23" (1/1) ... [2022-07-20 22:28:23,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:23" (1/1) ... [2022-07-20 22:28:23,423 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:23" (1/1) ... [2022-07-20 22:28:23,430 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:23" (1/1) ... [2022-07-20 22:28:23,432 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 22:28:23,434 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 22:28:23,434 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 22:28:23,435 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 22:28:23,436 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:23" (1/1) ... [2022-07-20 22:28:23,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:28:23,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:28:23,468 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) [2022-07-20 22:28:23,479 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 [2022-07-20 22:28:23,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 22:28:23,502 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2022-07-20 22:28:23,502 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2022-07-20 22:28:23,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 22:28:23,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 22:28:23,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-20 22:28:23,558 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 22:28:23,560 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 22:28:23,699 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 22:28:23,705 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 22:28:23,706 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-20 22:28:23,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:28:23 BoogieIcfgContainer [2022-07-20 22:28:23,708 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 22:28:23,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 22:28:23,710 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 22:28:23,712 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 22:28:23,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:28:23" (1/3) ... [2022-07-20 22:28:23,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aceb703 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:28:23, skipping insertion in model container [2022-07-20 22:28:23,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:23" (2/3) ... [2022-07-20 22:28:23,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aceb703 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:28:23, skipping insertion in model container [2022-07-20 22:28:23,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:28:23" (3/3) ... [2022-07-20 22:28:23,717 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi03-1.c [2022-07-20 22:28:23,732 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 22:28:23,733 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 22:28:23,794 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 22:28:23,805 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@7ff0c44d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@c709514 [2022-07-20 22:28:23,806 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 22:28:23,815 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 22:28:23,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 22:28:23,822 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:28:23,823 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:28:23,823 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:28:23,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:28:23,829 INFO L85 PathProgramCache]: Analyzing trace with hash -2087939196, now seen corresponding path program 1 times [2022-07-20 22:28:23,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:28:23,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2070428500] [2022-07-20 22:28:23,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:28:23,842 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:28:23,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:28:23,847 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:28:23,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-20 22:28:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:28:23,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 22:28:23,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:28:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:28:24,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:28:24,129 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:28:24,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2070428500] [2022-07-20 22:28:24,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2070428500] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:28:24,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:28:24,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 22:28:24,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523088767] [2022-07-20 22:28:24,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:28:24,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 22:28:24,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:28:24,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 22:28:24,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:28:24,169 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-20 22:28:24,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:28:24,304 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2022-07-20 22:28:24,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 22:28:24,309 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-07-20 22:28:24,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:28:24,316 INFO L225 Difference]: With dead ends: 32 [2022-07-20 22:28:24,316 INFO L226 Difference]: Without dead ends: 16 [2022-07-20 22:28:24,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-20 22:28:24,326 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:28:24,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 51 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:28:24,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-07-20 22:28:24,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-07-20 22:28:24,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 22:28:24,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-07-20 22:28:24,370 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2022-07-20 22:28:24,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:28:24,371 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-07-20 22:28:24,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-20 22:28:24,371 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-07-20 22:28:24,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-20 22:28:24,373 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:28:24,373 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:28:24,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-20 22:28:24,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:28:24,584 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:28:24,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:28:24,585 INFO L85 PathProgramCache]: Analyzing trace with hash -2053638732, now seen corresponding path program 1 times [2022-07-20 22:28:24,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:28:24,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1457255797] [2022-07-20 22:28:24,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:28:24,586 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:28:24,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:28:24,587 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:28:24,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-20 22:28:24,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:28:24,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 22:28:24,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:28:24,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 22:28:24,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:28:25,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 22:28:25,270 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:28:25,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1457255797] [2022-07-20 22:28:25,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1457255797] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:28:25,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:28:25,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-07-20 22:28:25,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329893953] [2022-07-20 22:28:25,272 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:28:25,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-20 22:28:25,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:28:25,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-20 22:28:25,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-07-20 22:28:25,274 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 22:28:25,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:28:25,622 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-07-20 22:28:25,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 22:28:25,623 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 17 [2022-07-20 22:28:25,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:28:25,624 INFO L225 Difference]: With dead ends: 28 [2022-07-20 22:28:25,624 INFO L226 Difference]: Without dead ends: 22 [2022-07-20 22:28:25,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-07-20 22:28:25,626 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:28:25,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 61 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 111 Invalid, 0 Unknown, 6 Unchecked, 0.2s Time] [2022-07-20 22:28:25,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-20 22:28:25,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-07-20 22:28:25,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-20 22:28:25,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-07-20 22:28:25,634 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2022-07-20 22:28:25,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:28:25,635 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-07-20 22:28:25,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 22:28:25,636 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-07-20 22:28:25,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-20 22:28:25,637 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:28:25,637 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:28:25,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-20 22:28:25,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:28:25,849 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:28:25,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:28:25,849 INFO L85 PathProgramCache]: Analyzing trace with hash -491101836, now seen corresponding path program 2 times [2022-07-20 22:28:25,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:28:25,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1210605075] [2022-07-20 22:28:25,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 22:28:25,850 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:28:25,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:28:25,852 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:28:25,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-20 22:28:25,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 22:28:25,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:28:25,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-20 22:28:25,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:28:26,082 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:28:26,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:28:27,635 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 22:28:27,635 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:28:27,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1210605075] [2022-07-20 22:28:27,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1210605075] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:28:27,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:28:27,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2022-07-20 22:28:27,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235729402] [2022-07-20 22:28:27,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:28:27,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-20 22:28:27,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:28:27,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-20 22:28:27,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-07-20 22:28:27,638 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 26 states, 25 states have (on average 1.36) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-20 22:28:28,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:28:28,263 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2022-07-20 22:28:28,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-20 22:28:28,264 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.36) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 29 [2022-07-20 22:28:28,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:28:28,265 INFO L225 Difference]: With dead ends: 34 [2022-07-20 22:28:28,265 INFO L226 Difference]: Without dead ends: 28 [2022-07-20 22:28:28,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=177, Invalid=1229, Unknown=0, NotChecked=0, Total=1406 [2022-07-20 22:28:28,267 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:28:28,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 124 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 171 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2022-07-20 22:28:28,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-20 22:28:28,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-07-20 22:28:28,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 20 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-20 22:28:28,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2022-07-20 22:28:28,274 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 29 [2022-07-20 22:28:28,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:28:28,274 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2022-07-20 22:28:28,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.36) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-20 22:28:28,280 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2022-07-20 22:28:28,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-20 22:28:28,282 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:28:28,282 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:28:28,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-20 22:28:28,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:28:28,491 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:28:28,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:28:28,492 INFO L85 PathProgramCache]: Analyzing trace with hash -492655308, now seen corresponding path program 3 times [2022-07-20 22:28:28,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:28:28,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [876531775] [2022-07-20 22:28:28,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 22:28:28,493 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:28:28,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:28:28,494 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:28:28,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-20 22:28:28,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-20 22:28:28,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:28:28,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-20 22:28:28,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:28:28,869 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-20 22:28:28,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:28:31,454 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 22:28:31,454 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:28:31,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [876531775] [2022-07-20 22:28:31,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [876531775] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:28:31,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:28:31,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 36 [2022-07-20 22:28:31,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825573260] [2022-07-20 22:28:31,455 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:28:31,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-20 22:28:31,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:28:31,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-20 22:28:31,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2022-07-20 22:28:31,458 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 24 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-20 22:28:32,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:28:32,166 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-07-20 22:28:32,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-20 22:28:32,167 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 24 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) Word has length 41 [2022-07-20 22:28:32,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:28:32,169 INFO L225 Difference]: With dead ends: 40 [2022-07-20 22:28:32,169 INFO L226 Difference]: Without dead ends: 34 [2022-07-20 22:28:32,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=290, Invalid=2260, Unknown=0, NotChecked=0, Total=2550 [2022-07-20 22:28:32,171 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:28:32,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 185 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 194 Invalid, 0 Unknown, 155 Unchecked, 0.2s Time] [2022-07-20 22:28:32,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-20 22:28:32,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-07-20 22:28:32,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-20 22:28:32,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-07-20 22:28:32,178 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 41 [2022-07-20 22:28:32,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:28:32,178 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-07-20 22:28:32,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 24 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-20 22:28:32,179 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-07-20 22:28:32,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-20 22:28:32,180 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:28:32,180 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:28:32,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-20 22:28:32,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:28:32,394 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:28:32,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:28:32,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1906255628, now seen corresponding path program 4 times [2022-07-20 22:28:32,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:28:32,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1664936096] [2022-07-20 22:28:32,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 22:28:32,396 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:28:32,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:28:32,398 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:28:32,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-20 22:28:32,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 22:28:32,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:28:32,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-20 22:28:32,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:28:32,819 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-07-20 22:28:32,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:28:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-20 22:28:36,550 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:28:36,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1664936096] [2022-07-20 22:28:36,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1664936096] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:28:36,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:28:36,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27] total 46 [2022-07-20 22:28:36,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34910685] [2022-07-20 22:28:36,551 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:28:36,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-20 22:28:36,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:28:36,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-20 22:28:36,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1913, Unknown=0, NotChecked=0, Total=2070 [2022-07-20 22:28:36,553 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 30 states have internal predecessors, (58), 10 states have call successors, (10), 1 states have call predecessors, (10), 16 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) [2022-07-20 22:28:37,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:28:37,552 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2022-07-20 22:28:37,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-20 22:28:37,553 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 30 states have internal predecessors, (58), 10 states have call successors, (10), 1 states have call predecessors, (10), 16 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) Word has length 53 [2022-07-20 22:28:37,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:28:37,554 INFO L225 Difference]: With dead ends: 46 [2022-07-20 22:28:37,554 INFO L226 Difference]: Without dead ends: 40 [2022-07-20 22:28:37,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=414, Invalid=3746, Unknown=0, NotChecked=0, Total=4160 [2022-07-20 22:28:37,557 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 28 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 289 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:28:37,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 299 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 338 Invalid, 0 Unknown, 289 Unchecked, 0.3s Time] [2022-07-20 22:28:37,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-20 22:28:37,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-07-20 22:28:37,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2022-07-20 22:28:37,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-07-20 22:28:37,564 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 53 [2022-07-20 22:28:37,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:28:37,565 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-07-20 22:28:37,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 30 states have internal predecessors, (58), 10 states have call successors, (10), 1 states have call predecessors, (10), 16 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) [2022-07-20 22:28:37,566 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-07-20 22:28:37,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-20 22:28:37,567 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:28:37,567 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:28:37,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-20 22:28:37,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:28:37,772 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:28:37,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:28:37,772 INFO L85 PathProgramCache]: Analyzing trace with hash 788849844, now seen corresponding path program 5 times [2022-07-20 22:28:37,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:28:37,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1347619033] [2022-07-20 22:28:37,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 22:28:37,773 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:28:37,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:28:37,774 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:28:37,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-20 22:28:37,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-20 22:28:37,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:28:37,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-20 22:28:37,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:28:38,261 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-07-20 22:28:38,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:28:43,320 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 22:28:43,320 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:28:43,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1347619033] [2022-07-20 22:28:43,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1347619033] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:28:43,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:28:43,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 33] total 56 [2022-07-20 22:28:43,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139652621] [2022-07-20 22:28:43,321 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:28:43,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-20 22:28:43,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:28:43,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-20 22:28:43,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2885, Unknown=0, NotChecked=0, Total=3080 [2022-07-20 22:28:43,324 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 36 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 20 states have return successors, (20), 20 states have call predecessors, (20), 12 states have call successors, (20) [2022-07-20 22:28:44,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:28:44,534 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2022-07-20 22:28:44,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-20 22:28:44,534 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 36 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 20 states have return successors, (20), 20 states have call predecessors, (20), 12 states have call successors, (20) Word has length 65 [2022-07-20 22:28:44,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:28:44,536 INFO L225 Difference]: With dead ends: 52 [2022-07-20 22:28:44,536 INFO L226 Difference]: Without dead ends: 46 [2022-07-20 22:28:44,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=554, Invalid=5608, Unknown=0, NotChecked=0, Total=6162 [2022-07-20 22:28:44,538 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 74 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 456 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:28:44,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 364 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 370 Invalid, 0 Unknown, 456 Unchecked, 0.3s Time] [2022-07-20 22:28:44,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-20 22:28:44,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-07-20 22:28:44,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.032258064516129) internal successors, (32), 32 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-20 22:28:44,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2022-07-20 22:28:44,545 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 65 [2022-07-20 22:28:44,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:28:44,546 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2022-07-20 22:28:44,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 36 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 20 states have return successors, (20), 20 states have call predecessors, (20), 12 states have call successors, (20) [2022-07-20 22:28:44,546 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2022-07-20 22:28:44,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-20 22:28:44,548 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:28:44,548 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:28:44,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-20 22:28:44,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:28:44,751 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:28:44,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:28:44,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1302253684, now seen corresponding path program 6 times [2022-07-20 22:28:44,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:28:44,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [189249573] [2022-07-20 22:28:44,752 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 22:28:44,753 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:28:44,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:28:44,754 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:28:44,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-20 22:28:44,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-07-20 22:28:44,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:28:44,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-20 22:28:44,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:28:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-07-20 22:28:45,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:28:52,306 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-20 22:28:52,307 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:28:52,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [189249573] [2022-07-20 22:28:52,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [189249573] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:28:52,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:28:52,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 39] total 66 [2022-07-20 22:28:52,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516690766] [2022-07-20 22:28:52,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:28:52,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-20 22:28:52,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:28:52,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-20 22:28:52,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=4057, Unknown=0, NotChecked=0, Total=4290 [2022-07-20 22:28:52,310 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 42 states have internal predecessors, (82), 14 states have call successors, (14), 1 states have call predecessors, (14), 24 states have return successors, (24), 24 states have call predecessors, (24), 14 states have call successors, (24) [2022-07-20 22:28:53,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:28:53,875 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2022-07-20 22:28:53,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-20 22:28:53,887 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 42 states have internal predecessors, (82), 14 states have call successors, (14), 1 states have call predecessors, (14), 24 states have return successors, (24), 24 states have call predecessors, (24), 14 states have call successors, (24) Word has length 77 [2022-07-20 22:28:53,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:28:53,891 INFO L225 Difference]: With dead ends: 58 [2022-07-20 22:28:53,891 INFO L226 Difference]: Without dead ends: 52 [2022-07-20 22:28:53,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=710, Invalid=7846, Unknown=0, NotChecked=0, Total=8556 [2022-07-20 22:28:53,894 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 19 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 650 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:28:53,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 647 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 629 Invalid, 0 Unknown, 650 Unchecked, 0.4s Time] [2022-07-20 22:28:53,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-20 22:28:53,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-07-20 22:28:53,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 36 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2022-07-20 22:28:53,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2022-07-20 22:28:53,901 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 77 [2022-07-20 22:28:53,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:28:53,902 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2022-07-20 22:28:53,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 42 states have internal predecessors, (82), 14 states have call successors, (14), 1 states have call predecessors, (14), 24 states have return successors, (24), 24 states have call predecessors, (24), 14 states have call successors, (24) [2022-07-20 22:28:53,902 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2022-07-20 22:28:53,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-20 22:28:53,904 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:28:53,904 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:28:53,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-20 22:28:54,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:28:54,112 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:28:54,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:28:54,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1287742412, now seen corresponding path program 7 times [2022-07-20 22:28:54,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:28:54,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1956167338] [2022-07-20 22:28:54,112 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 22:28:54,113 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:28:54,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:28:54,114 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:28:54,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-20 22:28:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:28:54,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-20 22:28:54,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:28:54,813 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-07-20 22:28:54,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:29:03,345 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-20 22:29:03,346 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:29:03,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1956167338] [2022-07-20 22:29:03,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1956167338] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:29:03,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:29:03,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 45] total 76 [2022-07-20 22:29:03,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559808574] [2022-07-20 22:29:03,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:29:03,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-07-20 22:29:03,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:29:03,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-07-20 22:29:03,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=5429, Unknown=0, NotChecked=0, Total=5700 [2022-07-20 22:29:03,349 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 76 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 48 states have internal predecessors, (94), 16 states have call successors, (16), 1 states have call predecessors, (16), 28 states have return successors, (28), 28 states have call predecessors, (28), 16 states have call successors, (28) [2022-07-20 22:29:05,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:29:05,208 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2022-07-20 22:29:05,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-20 22:29:05,208 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 48 states have internal predecessors, (94), 16 states have call successors, (16), 1 states have call predecessors, (16), 28 states have return successors, (28), 28 states have call predecessors, (28), 16 states have call successors, (28) Word has length 89 [2022-07-20 22:29:05,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:29:05,209 INFO L225 Difference]: With dead ends: 64 [2022-07-20 22:29:05,209 INFO L226 Difference]: Without dead ends: 58 [2022-07-20 22:29:05,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=882, Invalid=10460, Unknown=0, NotChecked=0, Total=11342 [2022-07-20 22:29:05,213 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 127 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 1677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 792 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:29:05,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 774 Invalid, 1677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 710 Invalid, 0 Unknown, 792 Unchecked, 0.4s Time] [2022-07-20 22:29:05,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-20 22:29:05,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-07-20 22:29:05,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 40 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2022-07-20 22:29:05,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-07-20 22:29:05,219 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 89 [2022-07-20 22:29:05,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:29:05,219 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-07-20 22:29:05,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 48 states have internal predecessors, (94), 16 states have call successors, (16), 1 states have call predecessors, (16), 28 states have return successors, (28), 28 states have call predecessors, (28), 16 states have call successors, (28) [2022-07-20 22:29:05,220 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-07-20 22:29:05,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-20 22:29:05,221 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:29:05,221 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:29:05,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-20 22:29:05,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:29:05,430 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:29:05,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:29:05,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1760839668, now seen corresponding path program 8 times [2022-07-20 22:29:05,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:29:05,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [191476748] [2022-07-20 22:29:05,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 22:29:05,431 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:29:05,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:29:05,432 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:29:05,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-20 22:29:05,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 22:29:05,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:29:05,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-20 22:29:05,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:29:06,247 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-07-20 22:29:06,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:29:16,703 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-20 22:29:16,703 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:29:16,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [191476748] [2022-07-20 22:29:16,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [191476748] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:29:16,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:29:16,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 51] total 86 [2022-07-20 22:29:16,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297715807] [2022-07-20 22:29:16,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:29:16,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-07-20 22:29:16,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:29:16,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-07-20 22:29:16,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=7001, Unknown=0, NotChecked=0, Total=7310 [2022-07-20 22:29:16,706 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 86 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 54 states have internal predecessors, (106), 18 states have call successors, (18), 1 states have call predecessors, (18), 32 states have return successors, (32), 32 states have call predecessors, (32), 18 states have call successors, (32) [2022-07-20 22:29:19,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:29:19,081 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2022-07-20 22:29:19,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-20 22:29:19,082 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 54 states have internal predecessors, (106), 18 states have call successors, (18), 1 states have call predecessors, (18), 32 states have return successors, (32), 32 states have call predecessors, (32), 18 states have call successors, (32) Word has length 101 [2022-07-20 22:29:19,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:29:19,083 INFO L225 Difference]: With dead ends: 70 [2022-07-20 22:29:19,083 INFO L226 Difference]: Without dead ends: 64 [2022-07-20 22:29:19,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1906 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=1070, Invalid=13450, Unknown=0, NotChecked=0, Total=14520 [2022-07-20 22:29:19,086 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 123 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 2173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1169 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:29:19,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 885 Invalid, 2173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 800 Invalid, 0 Unknown, 1169 Unchecked, 0.5s Time] [2022-07-20 22:29:19,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-20 22:29:19,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-07-20 22:29:19,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 44 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (19), 18 states have call predecessors, (19), 2 states have call successors, (19) [2022-07-20 22:29:19,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2022-07-20 22:29:19,092 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 101 [2022-07-20 22:29:19,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:29:19,093 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2022-07-20 22:29:19,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 54 states have internal predecessors, (106), 18 states have call successors, (18), 1 states have call predecessors, (18), 32 states have return successors, (32), 32 states have call predecessors, (32), 18 states have call successors, (32) [2022-07-20 22:29:19,093 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2022-07-20 22:29:19,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-20 22:29:19,095 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:29:19,095 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:29:19,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-20 22:29:19,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:29:19,307 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:29:19,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:29:19,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1211116620, now seen corresponding path program 9 times [2022-07-20 22:29:19,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:29:19,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [519064640] [2022-07-20 22:29:19,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 22:29:19,309 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:29:19,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:29:19,310 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:29:19,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-20 22:29:19,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-07-20 22:29:19,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:29:19,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-20 22:29:19,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:29:20,302 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-07-20 22:29:20,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:29:33,410 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-20 22:29:33,410 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:29:33,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [519064640] [2022-07-20 22:29:33,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [519064640] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:29:33,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:29:33,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 57] total 96 [2022-07-20 22:29:33,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96100783] [2022-07-20 22:29:33,411 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:29:33,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-07-20 22:29:33,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:29:33,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-07-20 22:29:33,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=8773, Unknown=0, NotChecked=0, Total=9120 [2022-07-20 22:29:33,413 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 96 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 60 states have internal predecessors, (118), 20 states have call successors, (20), 1 states have call predecessors, (20), 36 states have return successors, (36), 36 states have call predecessors, (36), 20 states have call successors, (36) [2022-07-20 22:29:35,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:29:35,933 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2022-07-20 22:29:35,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-20 22:29:35,934 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 60 states have internal predecessors, (118), 20 states have call successors, (20), 1 states have call predecessors, (20), 36 states have return successors, (36), 36 states have call predecessors, (36), 20 states have call successors, (36) Word has length 113 [2022-07-20 22:29:35,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:29:35,935 INFO L225 Difference]: With dead ends: 71 [2022-07-20 22:29:35,935 INFO L226 Difference]: Without dead ends: 67 [2022-07-20 22:29:35,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2227 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=1185, Invalid=15845, Unknown=0, NotChecked=0, Total=17030 [2022-07-20 22:29:35,937 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 377 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 564 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 1183 SdHoareTripleChecker+Invalid, 2890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 564 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1314 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:29:35,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 1183 Invalid, 2890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [564 Valid, 1012 Invalid, 0 Unknown, 1314 Unchecked, 0.6s Time] [2022-07-20 22:29:35,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-20 22:29:35,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-07-20 22:29:35,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 46 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (20), 19 states have call predecessors, (20), 2 states have call successors, (20) [2022-07-20 22:29:35,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2022-07-20 22:29:35,945 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 113 [2022-07-20 22:29:35,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:29:35,946 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2022-07-20 22:29:35,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 60 states have internal predecessors, (118), 20 states have call successors, (20), 1 states have call predecessors, (20), 36 states have return successors, (36), 36 states have call predecessors, (36), 20 states have call successors, (36) [2022-07-20 22:29:35,946 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2022-07-20 22:29:35,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-20 22:29:35,947 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:29:35,947 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:29:35,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-20 22:29:36,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:29:36,156 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:29:36,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:29:36,156 INFO L85 PathProgramCache]: Analyzing trace with hash 79612228, now seen corresponding path program 10 times [2022-07-20 22:29:36,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:29:36,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [515128828] [2022-07-20 22:29:36,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 22:29:36,157 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:29:36,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:29:36,158 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:29:36,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-20 22:29:36,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 22:29:36,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:29:36,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-20 22:29:36,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:29:37,236 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-07-20 22:29:37,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:29:51,753 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 819 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-07-20 22:29:51,753 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:29:51,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [515128828] [2022-07-20 22:29:51,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [515128828] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:29:51,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:29:51,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 60] total 101 [2022-07-20 22:29:51,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228242367] [2022-07-20 22:29:51,754 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:29:51,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-07-20 22:29:51,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:29:51,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-07-20 22:29:51,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=9734, Unknown=0, NotChecked=0, Total=10100 [2022-07-20 22:29:51,756 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 101 states, 100 states have (on average 1.24) internal successors, (124), 63 states have internal predecessors, (124), 21 states have call successors, (21), 1 states have call predecessors, (21), 38 states have return successors, (38), 38 states have call predecessors, (38), 21 states have call successors, (38) [2022-07-20 22:29:57,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:29:57,191 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2022-07-20 22:29:57,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-20 22:29:57,192 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 100 states have (on average 1.24) internal successors, (124), 63 states have internal predecessors, (124), 21 states have call successors, (21), 1 states have call predecessors, (21), 38 states have return successors, (38), 38 states have call predecessors, (38), 21 states have call successors, (38) Word has length 119 [2022-07-20 22:29:57,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:29:57,193 INFO L225 Difference]: With dead ends: 79 [2022-07-20 22:29:57,193 INFO L226 Difference]: Without dead ends: 73 [2022-07-20 22:29:57,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2676 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=1011, Invalid=19295, Unknown=0, NotChecked=0, Total=20306 [2022-07-20 22:29:57,195 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 221 mSDsluCounter, 1313 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 1339 SdHoareTripleChecker+Invalid, 2662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1179 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:29:57,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 1339 Invalid, 2662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 1118 Invalid, 0 Unknown, 1179 Unchecked, 0.6s Time] [2022-07-20 22:29:57,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-20 22:29:57,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-07-20 22:29:57,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 50 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (22), 21 states have call predecessors, (22), 2 states have call successors, (22) [2022-07-20 22:29:57,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2022-07-20 22:29:57,201 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 119 [2022-07-20 22:29:57,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:29:57,201 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2022-07-20 22:29:57,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 100 states have (on average 1.24) internal successors, (124), 63 states have internal predecessors, (124), 21 states have call successors, (21), 1 states have call predecessors, (21), 38 states have return successors, (38), 38 states have call predecessors, (38), 21 states have call successors, (38) [2022-07-20 22:29:57,202 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2022-07-20 22:29:57,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-20 22:29:57,203 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:29:57,203 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:29:57,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-07-20 22:29:57,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:29:57,413 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:29:57,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:29:57,413 INFO L85 PathProgramCache]: Analyzing trace with hash 720478468, now seen corresponding path program 11 times [2022-07-20 22:29:57,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:29:57,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983865997] [2022-07-20 22:29:57,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 22:29:57,414 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:29:57,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:29:57,415 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:29:57,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-20 22:29:57,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2022-07-20 22:29:57,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:29:57,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-20 22:29:57,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:29:58,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2022-07-20 22:29:58,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:30:16,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 1010 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-07-20 22:30:16,156 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:30:16,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983865997] [2022-07-20 22:30:16,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983865997] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:30:16,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:30:16,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 66] total 111 [2022-07-20 22:30:16,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739343605] [2022-07-20 22:30:16,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:30:16,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-07-20 22:30:16,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:30:16,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-07-20 22:30:16,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=11806, Unknown=0, NotChecked=0, Total=12210 [2022-07-20 22:30:16,160 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 111 states, 110 states have (on average 1.2363636363636363) internal successors, (136), 69 states have internal predecessors, (136), 23 states have call successors, (23), 1 states have call predecessors, (23), 42 states have return successors, (42), 42 states have call predecessors, (42), 23 states have call successors, (42) [2022-07-20 22:30:19,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:30:19,215 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2022-07-20 22:30:19,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-20 22:30:19,216 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 110 states have (on average 1.2363636363636363) internal successors, (136), 69 states have internal predecessors, (136), 23 states have call successors, (23), 1 states have call predecessors, (23), 42 states have return successors, (42), 42 states have call predecessors, (42), 23 states have call successors, (42) Word has length 131 [2022-07-20 22:30:19,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:30:19,216 INFO L225 Difference]: With dead ends: 80 [2022-07-20 22:30:19,217 INFO L226 Difference]: Without dead ends: 76 [2022-07-20 22:30:19,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3007 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=1509, Invalid=21443, Unknown=0, NotChecked=0, Total=22952 [2022-07-20 22:30:19,218 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 76 mSDsluCounter, 1598 mSDsCounter, 0 mSdLazyCounter, 1409 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 3314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1798 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:30:19,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 1626 Invalid, 3314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1409 Invalid, 0 Unknown, 1798 Unchecked, 0.6s Time] [2022-07-20 22:30:19,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-20 22:30:19,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-07-20 22:30:19,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 52 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (23), 22 states have call predecessors, (23), 2 states have call successors, (23) [2022-07-20 22:30:19,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2022-07-20 22:30:19,224 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 131 [2022-07-20 22:30:19,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:30:19,224 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2022-07-20 22:30:19,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 110 states have (on average 1.2363636363636363) internal successors, (136), 69 states have internal predecessors, (136), 23 states have call successors, (23), 1 states have call predecessors, (23), 42 states have return successors, (42), 42 states have call predecessors, (42), 23 states have call successors, (42) [2022-07-20 22:30:19,225 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2022-07-20 22:30:19,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-07-20 22:30:19,226 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:30:19,226 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:30:19,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-20 22:30:19,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:30:19,435 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:30:19,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:30:19,436 INFO L85 PathProgramCache]: Analyzing trace with hash -2059891916, now seen corresponding path program 12 times [2022-07-20 22:30:19,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:30:19,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834047649] [2022-07-20 22:30:19,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 22:30:19,437 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:30:19,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:30:19,438 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:30:19,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-20 22:30:19,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-07-20 22:30:19,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:30:19,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 92 conjunts are in the unsatisfiable core [2022-07-20 22:30:19,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:30:20,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2022-07-20 22:30:20,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:30:39,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1113 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-07-20 22:30:39,863 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:30:39,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834047649] [2022-07-20 22:30:39,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1834047649] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:30:39,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:30:39,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 69] total 116 [2022-07-20 22:30:39,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011280168] [2022-07-20 22:30:39,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:30:39,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-07-20 22:30:39,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:30:39,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-07-20 22:30:39,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=12917, Unknown=0, NotChecked=0, Total=13340 [2022-07-20 22:30:39,865 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 116 states, 115 states have (on average 1.2347826086956522) internal successors, (142), 72 states have internal predecessors, (142), 24 states have call successors, (24), 1 states have call predecessors, (24), 44 states have return successors, (44), 44 states have call predecessors, (44), 24 states have call successors, (44) [2022-07-20 22:30:43,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:30:43,669 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2022-07-20 22:30:43,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-20 22:30:43,670 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 115 states have (on average 1.2347826086956522) internal successors, (142), 72 states have internal predecessors, (142), 24 states have call successors, (24), 1 states have call predecessors, (24), 44 states have return successors, (44), 44 states have call predecessors, (44), 24 states have call successors, (44) Word has length 137 [2022-07-20 22:30:43,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:30:43,671 INFO L225 Difference]: With dead ends: 88 [2022-07-20 22:30:43,671 INFO L226 Difference]: Without dead ends: 82 [2022-07-20 22:30:43,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3475 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=1730, Invalid=24676, Unknown=0, NotChecked=0, Total=26406 [2022-07-20 22:30:43,673 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 160 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 1398 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 1719 SdHoareTripleChecker+Invalid, 3732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 1398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2058 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:30:43,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 1719 Invalid, 3732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 1398 Invalid, 0 Unknown, 2058 Unchecked, 0.6s Time] [2022-07-20 22:30:43,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-20 22:30:43,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-07-20 22:30:43,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 55 states have (on average 1.018181818181818) internal successors, (56), 56 states have internal predecessors, (56), 2 states have call successors, (2), 1 states have call predecessors, (2), 24 states have return successors, (25), 24 states have call predecessors, (25), 2 states have call successors, (25) [2022-07-20 22:30:43,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2022-07-20 22:30:43,678 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 137 [2022-07-20 22:30:43,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:30:43,678 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2022-07-20 22:30:43,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 115 states have (on average 1.2347826086956522) internal successors, (142), 72 states have internal predecessors, (142), 24 states have call successors, (24), 1 states have call predecessors, (24), 44 states have return successors, (44), 44 states have call predecessors, (44), 24 states have call successors, (44) [2022-07-20 22:30:43,679 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2022-07-20 22:30:43,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-07-20 22:30:43,680 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:30:43,680 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:30:43,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-20 22:30:43,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:30:43,891 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:30:43,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:30:43,892 INFO L85 PathProgramCache]: Analyzing trace with hash -706365708, now seen corresponding path program 13 times [2022-07-20 22:30:43,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:30:43,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [351345203] [2022-07-20 22:30:43,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 22:30:43,892 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:30:43,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:30:43,893 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:30:43,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-20 22:30:44,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:30:44,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 100 conjunts are in the unsatisfiable core [2022-07-20 22:30:44,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:30:45,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2022-07-20 22:30:45,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:31:06,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-07-20 22:31:06,884 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:31:06,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [351345203] [2022-07-20 22:31:06,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [351345203] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:31:06,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:31:06,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 75] total 126 [2022-07-20 22:31:06,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427629012] [2022-07-20 22:31:06,884 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:31:06,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-07-20 22:31:06,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:31:06,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-07-20 22:31:06,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=15289, Unknown=0, NotChecked=0, Total=15750 [2022-07-20 22:31:06,887 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 126 states, 125 states have (on average 1.232) internal successors, (154), 78 states have internal predecessors, (154), 26 states have call successors, (26), 1 states have call predecessors, (26), 48 states have return successors, (48), 48 states have call predecessors, (48), 26 states have call successors, (48) [2022-07-20 22:31:11,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:31:11,475 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2022-07-20 22:31:11,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-20 22:31:11,476 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 125 states have (on average 1.232) internal successors, (154), 78 states have internal predecessors, (154), 26 states have call successors, (26), 1 states have call predecessors, (26), 48 states have return successors, (48), 48 states have call predecessors, (48), 26 states have call successors, (48) Word has length 149 [2022-07-20 22:31:11,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:31:11,477 INFO L225 Difference]: With dead ends: 94 [2022-07-20 22:31:11,477 INFO L226 Difference]: Without dead ends: 88 [2022-07-20 22:31:11,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4102 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=1982, Invalid=29170, Unknown=0, NotChecked=0, Total=31152 [2022-07-20 22:31:11,479 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 558 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 953 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 1860 SdHoareTripleChecker+Invalid, 5133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 953 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2382 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 22:31:11,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 1860 Invalid, 5133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [953 Valid, 1798 Invalid, 0 Unknown, 2382 Unchecked, 0.9s Time] [2022-07-20 22:31:11,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-20 22:31:11,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-07-20 22:31:11,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 60 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (27), 26 states have call predecessors, (27), 2 states have call successors, (27) [2022-07-20 22:31:11,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2022-07-20 22:31:11,491 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 149 [2022-07-20 22:31:11,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:31:11,491 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2022-07-20 22:31:11,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 125 states have (on average 1.232) internal successors, (154), 78 states have internal predecessors, (154), 26 states have call successors, (26), 1 states have call predecessors, (26), 48 states have return successors, (48), 48 states have call predecessors, (48), 26 states have call successors, (48) [2022-07-20 22:31:11,492 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2022-07-20 22:31:11,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-07-20 22:31:11,493 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:31:11,493 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:31:11,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-20 22:31:11,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:31:11,703 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:31:11,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:31:11,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1677247156, now seen corresponding path program 14 times [2022-07-20 22:31:11,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:31:11,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [812998486] [2022-07-20 22:31:11,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 22:31:11,704 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:31:11,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:31:11,705 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:31:11,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-20 22:31:11,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 22:31:11,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:31:11,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 108 conjunts are in the unsatisfiable core [2022-07-20 22:31:11,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:31:13,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2022-07-20 22:31:13,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:31:38,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 1575 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-07-20 22:31:38,819 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:31:38,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [812998486] [2022-07-20 22:31:38,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [812998486] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:31:38,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:31:38,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 81] total 136 [2022-07-20 22:31:38,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57517818] [2022-07-20 22:31:38,819 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:31:38,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-07-20 22:31:38,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:31:38,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-07-20 22:31:38,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=17861, Unknown=0, NotChecked=0, Total=18360 [2022-07-20 22:31:38,821 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 136 states, 135 states have (on average 1.2296296296296296) internal successors, (166), 84 states have internal predecessors, (166), 28 states have call successors, (28), 1 states have call predecessors, (28), 52 states have return successors, (52), 52 states have call predecessors, (52), 28 states have call successors, (52) [2022-07-20 22:31:44,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:31:44,124 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2022-07-20 22:31:44,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-20 22:31:44,125 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 135 states have (on average 1.2296296296296296) internal successors, (166), 84 states have internal predecessors, (166), 28 states have call successors, (28), 1 states have call predecessors, (28), 52 states have return successors, (52), 52 states have call predecessors, (52), 28 states have call successors, (52) Word has length 161 [2022-07-20 22:31:44,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:31:44,126 INFO L225 Difference]: With dead ends: 100 [2022-07-20 22:31:44,126 INFO L226 Difference]: Without dead ends: 94 [2022-07-20 22:31:44,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4781 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=2250, Invalid=34040, Unknown=0, NotChecked=0, Total=36290 [2022-07-20 22:31:44,129 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 510 mSDsluCounter, 2308 mSDsCounter, 0 mSdLazyCounter, 2472 mSolverCounterSat, 837 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 2341 SdHoareTripleChecker+Invalid, 6040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 837 IncrementalHoareTripleChecker+Valid, 2472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2731 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:31:44,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [541 Valid, 2341 Invalid, 6040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [837 Valid, 2472 Invalid, 0 Unknown, 2731 Unchecked, 1.1s Time] [2022-07-20 22:31:44,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-20 22:31:44,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-07-20 22:31:44,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 64 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 28 states have return successors, (29), 28 states have call predecessors, (29), 2 states have call successors, (29) [2022-07-20 22:31:44,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2022-07-20 22:31:44,134 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 161 [2022-07-20 22:31:44,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:31:44,135 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2022-07-20 22:31:44,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 135 states have (on average 1.2296296296296296) internal successors, (166), 84 states have internal predecessors, (166), 28 states have call successors, (28), 1 states have call predecessors, (28), 52 states have return successors, (52), 52 states have call predecessors, (52), 28 states have call successors, (52) [2022-07-20 22:31:44,135 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2022-07-20 22:31:44,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-07-20 22:31:44,136 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:31:44,137 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:31:44,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-20 22:31:44,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 22:31:44,347 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:31:44,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:31:44,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1199460748, now seen corresponding path program 15 times [2022-07-20 22:31:44,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 22:31:44,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [128409503] [2022-07-20 22:31:44,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 22:31:44,348 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 22:31:44,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 22:31:44,349 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 22:31:44,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-20 22:31:44,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-07-20 22:31:44,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:31:44,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 116 conjunts are in the unsatisfiable core [2022-07-20 22:31:44,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:31:46,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2022-07-20 22:31:46,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:32:15,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1836 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-07-20 22:32:15,122 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 22:32:15,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [128409503] [2022-07-20 22:32:15,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [128409503] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:32:15,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:32:15,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 87] total 146 [2022-07-20 22:32:15,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541199081] [2022-07-20 22:32:15,122 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 22:32:15,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-07-20 22:32:15,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 22:32:15,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-07-20 22:32:15,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=20633, Unknown=0, NotChecked=0, Total=21170 [2022-07-20 22:32:15,125 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 146 states, 145 states have (on average 1.2275862068965517) internal successors, (178), 90 states have internal predecessors, (178), 30 states have call successors, (30), 1 states have call predecessors, (30), 56 states have return successors, (56), 56 states have call predecessors, (56), 30 states have call successors, (56)