./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 791161d1 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-?-791161d [2022-07-22 11:06:38,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 11:06:38,546 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 11:06:38,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 11:06:38,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 11:06:38,580 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 11:06:38,582 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 11:06:38,586 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 11:06:38,588 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 11:06:38,592 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 11:06:38,593 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 11:06:38,595 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 11:06:38,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 11:06:38,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 11:06:38,598 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 11:06:38,601 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 11:06:38,602 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 11:06:38,603 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 11:06:38,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 11:06:38,610 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 11:06:38,612 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 11:06:38,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 11:06:38,613 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 11:06:38,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 11:06:38,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 11:06:38,622 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 11:06:38,623 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 11:06:38,624 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 11:06:38,625 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 11:06:38,625 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 11:06:38,627 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 11:06:38,627 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 11:06:38,628 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 11:06:38,629 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 11:06:38,629 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 11:06:38,630 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 11:06:38,630 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 11:06:38,631 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 11:06:38,631 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 11:06:38,632 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 11:06:38,633 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 11:06:38,634 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 11:06:38,636 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 11:06:38,673 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 11:06:38,674 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 11:06:38,674 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 11:06:38,674 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 11:06:38,675 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 11:06:38,675 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 11:06:38,676 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 11:06:38,676 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 11:06:38,676 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 11:06:38,677 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 11:06:38,677 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 11:06:38,677 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 11:06:38,678 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 11:06:38,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 11:06:38,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 11:06:38,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 11:06:38,678 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 11:06:38,679 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 11:06:38,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 11:06:38,679 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 11:06:38,679 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 11:06:38,679 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 11:06:38,680 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 11:06:38,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 11:06:38,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:06:38,680 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 11:06:38,680 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 11:06:38,681 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 11:06:38,681 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 11:06:38,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 11:06:38,681 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 11:06:38,681 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 11:06:38,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 11:06:38,682 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a58a565ed7a29809aaccd8966118196fec0a697f2fc6db04cc260beeab4df83 [2022-07-22 11:06:38,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 11:06:38,949 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 11:06:38,951 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 11:06:38,952 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 11:06:38,955 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 11:06:38,956 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2022-07-22 11:06:39,007 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40153ec43/5ed5c0e976b0468d8efc31872f1b87b5/FLAGefaa80d18 [2022-07-22 11:06:39,402 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 11:06:39,402 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2022-07-22 11:06:39,408 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40153ec43/5ed5c0e976b0468d8efc31872f1b87b5/FLAGefaa80d18 [2022-07-22 11:06:39,809 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40153ec43/5ed5c0e976b0468d8efc31872f1b87b5 [2022-07-22 11:06:39,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 11:06:39,813 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 11:06:39,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 11:06:39,816 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 11:06:39,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 11:06:39,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:06:39" (1/1) ... [2022-07-22 11:06:39,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@242d63a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:06:39, skipping insertion in model container [2022-07-22 11:06:39,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:06:39" (1/1) ... [2022-07-22 11:06:39,826 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 11:06:39,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 11:06:40,011 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] [2022-07-22 11:06:40,014 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:06:40,024 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 11:06:40,043 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] [2022-07-22 11:06:40,044 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:06:40,055 INFO L208 MainTranslator]: Completed translation [2022-07-22 11:06:40,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:06:40 WrapperNode [2022-07-22 11:06:40,057 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 11:06:40,059 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 11:06:40,059 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 11:06:40,059 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 11:06:40,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:06:40" (1/1) ... [2022-07-22 11:06:40,071 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:06:40" (1/1) ... [2022-07-22 11:06:40,085 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 25 [2022-07-22 11:06:40,086 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 11:06:40,087 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 11:06:40,087 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 11:06:40,087 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 11:06:40,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:06:40" (1/1) ... [2022-07-22 11:06:40,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:06:40" (1/1) ... [2022-07-22 11:06:40,096 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:06:40" (1/1) ... [2022-07-22 11:06:40,096 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:06:40" (1/1) ... [2022-07-22 11:06:40,099 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:06:40" (1/1) ... [2022-07-22 11:06:40,103 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:06:40" (1/1) ... [2022-07-22 11:06:40,106 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:06:40" (1/1) ... [2022-07-22 11:06:40,109 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 11:06:40,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 11:06:40,111 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 11:06:40,111 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 11:06:40,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:06:40" (1/1) ... [2022-07-22 11:06:40,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:06:40,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:06:40,141 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) [2022-07-22 11:06:40,163 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 [2022-07-22 11:06:40,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 11:06:40,180 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2022-07-22 11:06:40,181 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2022-07-22 11:06:40,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 11:06:40,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 11:06:40,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 11:06:40,237 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 11:06:40,238 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 11:06:40,363 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 11:06:40,368 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 11:06:40,369 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-22 11:06:40,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:06:40 BoogieIcfgContainer [2022-07-22 11:06:40,371 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 11:06:40,372 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 11:06:40,372 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 11:06:40,378 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 11:06:40,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 11:06:39" (1/3) ... [2022-07-22 11:06:40,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51b85e82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:06:40, skipping insertion in model container [2022-07-22 11:06:40,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:06:40" (2/3) ... [2022-07-22 11:06:40,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51b85e82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:06:40, skipping insertion in model container [2022-07-22 11:06:40,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:06:40" (3/3) ... [2022-07-22 11:06:40,381 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi03-1.c [2022-07-22 11:06:40,392 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 11:06:40,395 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 11:06:40,452 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 11:06:40,460 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@4d5a1d93, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5fda96d2 [2022-07-22 11:06:40,460 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 11:06:40,465 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) [2022-07-22 11:06:40,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-22 11:06:40,475 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:06:40,475 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:06:40,476 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:06:40,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:06:40,482 INFO L85 PathProgramCache]: Analyzing trace with hash -2087939196, now seen corresponding path program 1 times [2022-07-22 11:06:40,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:06:40,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651034176] [2022-07-22 11:06:40,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:06:40,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:06:40,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 11:06:40,602 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 11:06:40,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 11:06:40,652 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 11:06:40,654 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 11:06:40,655 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-22 11:06:40,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 11:06:40,660 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-22 11:06:40,664 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-22 11:06:40,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.07 11:06:40 BoogieIcfgContainer [2022-07-22 11:06:40,686 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-22 11:06:40,688 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-22 11:06:40,688 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-22 11:06:40,688 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-22 11:06:40,688 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:06:40" (3/4) ... [2022-07-22 11:06:40,691 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-22 11:06:40,692 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-22 11:06:40,694 INFO L158 Benchmark]: Toolchain (without parser) took 880.12ms. Allocated memory was 77.6MB in the beginning and 109.1MB in the end (delta: 31.5MB). Free memory was 42.5MB in the beginning and 60.1MB in the end (delta: -17.6MB). Peak memory consumption was 11.9MB. Max. memory is 16.1GB. [2022-07-22 11:06:40,694 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 77.6MB. Free memory was 58.2MB in the beginning and 58.2MB in the end (delta: 46.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 11:06:40,695 INFO L158 Benchmark]: CACSL2BoogieTranslator took 241.71ms. Allocated memory was 77.6MB in the beginning and 109.1MB in the end (delta: 31.5MB). Free memory was 42.3MB in the beginning and 86.6MB in the end (delta: -44.3MB). Peak memory consumption was 5.6MB. Max. memory is 16.1GB. [2022-07-22 11:06:40,696 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.12ms. Allocated memory is still 109.1MB. Free memory was 86.6MB in the beginning and 85.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 11:06:40,700 INFO L158 Benchmark]: Boogie Preprocessor took 22.22ms. Allocated memory is still 109.1MB. Free memory was 85.0MB in the beginning and 84.3MB in the end (delta: 751.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 11:06:40,700 INFO L158 Benchmark]: RCFGBuilder took 260.70ms. Allocated memory is still 109.1MB. Free memory was 84.0MB in the beginning and 74.5MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-22 11:06:40,702 INFO L158 Benchmark]: TraceAbstraction took 313.90ms. Allocated memory is still 109.1MB. Free memory was 74.0MB in the beginning and 60.3MB in the end (delta: 13.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-07-22 11:06:40,702 INFO L158 Benchmark]: Witness Printer took 4.65ms. Allocated memory is still 109.1MB. Free memory was 60.3MB in the beginning and 60.1MB in the end (delta: 239.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 11:06:40,708 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 77.6MB. Free memory was 58.2MB in the beginning and 58.2MB in the end (delta: 46.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 241.71ms. Allocated memory was 77.6MB in the beginning and 109.1MB in the end (delta: 31.5MB). Free memory was 42.3MB in the beginning and 86.6MB in the end (delta: -44.3MB). Peak memory consumption was 5.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.12ms. Allocated memory is still 109.1MB. Free memory was 86.6MB in the beginning and 85.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.22ms. Allocated memory is still 109.1MB. Free memory was 85.0MB in the beginning and 84.3MB in the end (delta: 751.6kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 260.70ms. Allocated memory is still 109.1MB. Free memory was 84.0MB in the beginning and 74.5MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 313.90ms. Allocated memory is still 109.1MB. Free memory was 74.0MB in the beginning and 60.3MB in the end (delta: 13.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Witness Printer took 4.65ms. Allocated memory is still 109.1MB. Free memory was 60.3MB in the beginning and 60.1MB in the end (delta: 239.2kB). 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 [2022-07-22 11:06:43,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 11:06:43,051 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 11:06:43,054 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 11:06:43,055 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 11:06:43,055 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 11:06:43,057 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2022-07-22 11:06:43,109 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3186cf61a/18c86c6c7535414ab23565b7fbf4669e/FLAGeca9ade3d [2022-07-22 11:06:43,485 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 11:06:43,485 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2022-07-22 11:06:43,494 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3186cf61a/18c86c6c7535414ab23565b7fbf4669e/FLAGeca9ade3d [2022-07-22 11:06:43,916 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3186cf61a/18c86c6c7535414ab23565b7fbf4669e [2022-07-22 11:06:43,919 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 11:06:43,920 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 11:06:43,922 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 11:06:43,922 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 11:06:43,925 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 11:06:43,926 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:06:43" (1/1) ... [2022-07-22 11:06:43,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55382ac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:06:43, skipping insertion in model container [2022-07-22 11:06:43,927 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:06:43" (1/1) ... [2022-07-22 11:06:43,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 11:06:43,944 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 11:06:44,069 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] [2022-07-22 11:06:44,072 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:06:44,093 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 11:06:44,111 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] [2022-07-22 11:06:44,112 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:06:44,126 INFO L208 MainTranslator]: Completed translation [2022-07-22 11:06:44,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:06:44 WrapperNode [2022-07-22 11:06:44,126 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 11:06:44,129 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 11:06:44,129 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 11:06:44,129 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 11:06:44,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:06:44" (1/1) ... [2022-07-22 11:06:44,146 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:06:44" (1/1) ... [2022-07-22 11:06:44,159 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2022-07-22 11:06:44,160 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 11:06:44,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 11:06:44,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 11:06:44,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 11:06:44,185 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:06:44" (1/1) ... [2022-07-22 11:06:44,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:06:44" (1/1) ... [2022-07-22 11:06:44,189 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:06:44" (1/1) ... [2022-07-22 11:06:44,190 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:06:44" (1/1) ... [2022-07-22 11:06:44,199 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:06:44" (1/1) ... [2022-07-22 11:06:44,200 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:06:44" (1/1) ... [2022-07-22 11:06:44,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:06:44" (1/1) ... [2022-07-22 11:06:44,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 11:06:44,210 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 11:06:44,210 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 11:06:44,211 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 11:06:44,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:06:44" (1/1) ... [2022-07-22 11:06:44,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:06:44,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:06:44,240 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) [2022-07-22 11:06:44,256 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 [2022-07-22 11:06:44,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 11:06:44,288 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2022-07-22 11:06:44,288 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2022-07-22 11:06:44,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 11:06:44,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 11:06:44,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-22 11:06:44,358 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 11:06:44,360 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 11:06:44,491 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 11:06:44,498 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 11:06:44,499 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-22 11:06:44,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:06:44 BoogieIcfgContainer [2022-07-22 11:06:44,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 11:06:44,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 11:06:44,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 11:06:44,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 11:06:44,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 11:06:43" (1/3) ... [2022-07-22 11:06:44,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e20365 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:06:44, skipping insertion in model container [2022-07-22 11:06:44,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:06:44" (2/3) ... [2022-07-22 11:06:44,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e20365 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:06:44, skipping insertion in model container [2022-07-22 11:06:44,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:06:44" (3/3) ... [2022-07-22 11:06:44,510 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi03-1.c [2022-07-22 11:06:44,522 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 11:06:44,522 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 11:06:44,578 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 11:06:44,586 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@43df442, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7100e6d7 [2022-07-22 11:06:44,587 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 11:06:44,591 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) [2022-07-22 11:06:44,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-22 11:06:44,601 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:06:44,602 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:06:44,603 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:06:44,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:06:44,609 INFO L85 PathProgramCache]: Analyzing trace with hash -2087939196, now seen corresponding path program 1 times [2022-07-22 11:06:44,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:06:44,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [818279814] [2022-07-22 11:06:44,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:06:44,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:06:44,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:06:44,623 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) [2022-07-22 11:06:44,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-22 11:06:44,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:06:44,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 11:06:44,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:06:44,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:06:44,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:06:44,965 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:06:44,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [818279814] [2022-07-22 11:06:44,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [818279814] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:06:44,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:06:44,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 11:06:44,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795473792] [2022-07-22 11:06:44,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:06:44,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 11:06:44,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:06:45,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 11:06:45,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:06:45,006 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) [2022-07-22 11:06:45,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:06:45,099 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2022-07-22 11:06:45,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 11:06:45,102 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 [2022-07-22 11:06:45,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:06:45,107 INFO L225 Difference]: With dead ends: 32 [2022-07-22 11:06:45,108 INFO L226 Difference]: Without dead ends: 16 [2022-07-22 11:06:45,110 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 [2022-07-22 11:06:45,113 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-07-22 11:06:45,113 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] [2022-07-22 11:06:45,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-07-22 11:06:45,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-07-22 11:06:45,156 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) [2022-07-22 11:06:45,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-07-22 11:06:45,158 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2022-07-22 11:06:45,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:06:45,169 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-07-22 11:06:45,169 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) [2022-07-22 11:06:45,169 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-07-22 11:06:45,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-22 11:06:45,170 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:06:45,170 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:06:45,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-22 11:06:45,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:06:45,372 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:06:45,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:06:45,372 INFO L85 PathProgramCache]: Analyzing trace with hash -2053638732, now seen corresponding path program 1 times [2022-07-22 11:06:45,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:06:45,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690094991] [2022-07-22 11:06:45,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:06:45,373 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:06:45,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:06:45,374 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) [2022-07-22 11:06:45,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-22 11:06:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:06:45,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 11:06:45,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:06:45,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 11:06:45,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:06:46,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 11:06:46,072 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:06:46,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690094991] [2022-07-22 11:06:46,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [690094991] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:06:46,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:06:46,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-07-22 11:06:46,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553443324] [2022-07-22 11:06:46,073 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:06:46,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 11:06:46,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:06:46,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 11:06:46,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-07-22 11:06:46,076 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) [2022-07-22 11:06:46,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:06:46,385 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-07-22 11:06:46,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 11:06:46,386 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 [2022-07-22 11:06:46,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:06:46,387 INFO L225 Difference]: With dead ends: 28 [2022-07-22 11:06:46,387 INFO L226 Difference]: Without dead ends: 22 [2022-07-22 11:06:46,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-07-22 11:06:46,389 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, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:06:46,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 61 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 111 Invalid, 0 Unknown, 6 Unchecked, 0.1s Time] [2022-07-22 11:06:46,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-22 11:06:46,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-07-22 11:06:46,394 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) [2022-07-22 11:06:46,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-07-22 11:06:46,395 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2022-07-22 11:06:46,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:06:46,396 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-07-22 11:06:46,396 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) [2022-07-22 11:06:46,396 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-07-22 11:06:46,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-22 11:06:46,397 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:06:46,397 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:06:46,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-22 11:06:46,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:06:46,610 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:06:46,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:06:46,610 INFO L85 PathProgramCache]: Analyzing trace with hash -491101836, now seen corresponding path program 2 times [2022-07-22 11:06:46,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:06:46,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [145786383] [2022-07-22 11:06:46,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 11:06:46,611 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:06:46,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:06:46,613 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) [2022-07-22 11:06:46,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-22 11:06:46,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 11:06:46,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:06:46,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 11:06:46,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:06:46,849 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 11:06:46,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:06:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 11:06:47,971 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:06:47,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [145786383] [2022-07-22 11:06:47,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [145786383] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:06:47,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:06:47,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2022-07-22 11:06:47,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601933762] [2022-07-22 11:06:47,972 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:06:47,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-22 11:06:47,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:06:47,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-22 11:06:47,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-07-22 11:06:47,974 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) [2022-07-22 11:06:48,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:06:48,657 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2022-07-22 11:06:48,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 11:06:48,658 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 [2022-07-22 11:06:48,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:06:48,659 INFO L225 Difference]: With dead ends: 34 [2022-07-22 11:06:48,659 INFO L226 Difference]: Without dead ends: 28 [2022-07-22 11:06:48,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=177, Invalid=1229, Unknown=0, NotChecked=0, Total=1406 [2022-07-22 11:06:48,661 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 [2022-07-22 11:06:48,661 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] [2022-07-22 11:06:48,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-22 11:06:48,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-07-22 11:06:48,666 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) [2022-07-22 11:06:48,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2022-07-22 11:06:48,667 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 29 [2022-07-22 11:06:48,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:06:48,668 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2022-07-22 11:06:48,668 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) [2022-07-22 11:06:48,668 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2022-07-22 11:06:48,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-22 11:06:48,669 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:06:48,669 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:06:48,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-22 11:06:48,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:06:48,870 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:06:48,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:06:48,871 INFO L85 PathProgramCache]: Analyzing trace with hash -492655308, now seen corresponding path program 3 times [2022-07-22 11:06:48,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:06:48,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1521037871] [2022-07-22 11:06:48,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 11:06:48,872 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:06:48,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:06:48,873 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) [2022-07-22 11:06:48,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-22 11:06:48,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-22 11:06:48,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:06:48,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-22 11:06:48,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:06:49,207 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-22 11:06:49,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:06:51,016 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 11:06:51,017 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:06:51,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1521037871] [2022-07-22 11:06:51,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1521037871] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:06:51,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:06:51,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 36 [2022-07-22 11:06:51,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797531298] [2022-07-22 11:06:51,021 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:06:51,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-22 11:06:51,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:06:51,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-22 11:06:51,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2022-07-22 11:06:51,025 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) [2022-07-22 11:06:51,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:06:51,653 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-07-22 11:06:51,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 11:06:51,656 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 [2022-07-22 11:06:51,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:06:51,657 INFO L225 Difference]: With dead ends: 40 [2022-07-22 11:06:51,657 INFO L226 Difference]: Without dead ends: 34 [2022-07-22 11:06:51,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=290, Invalid=2260, Unknown=0, NotChecked=0, Total=2550 [2022-07-22 11:06:51,660 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 [2022-07-22 11:06:51,660 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] [2022-07-22 11:06:51,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-22 11:06:51,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-07-22 11:06:51,666 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) [2022-07-22 11:06:51,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-07-22 11:06:51,668 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 41 [2022-07-22 11:06:51,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:06:51,668 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-07-22 11:06:51,668 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) [2022-07-22 11:06:51,669 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-07-22 11:06:51,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-22 11:06:51,670 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:06:51,670 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:06:51,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-22 11:06:51,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:06:51,871 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:06:51,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:06:51,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1906255628, now seen corresponding path program 4 times [2022-07-22 11:06:51,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:06:51,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1896216768] [2022-07-22 11:06:51,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 11:06:51,875 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:06:51,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:06:51,876 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) [2022-07-22 11:06:51,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-22 11:06:51,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 11:06:51,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:06:51,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-22 11:06:51,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:06:52,303 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-07-22 11:06:52,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:06:54,964 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-22 11:06:54,964 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:06:54,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1896216768] [2022-07-22 11:06:54,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1896216768] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:06:54,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:06:54,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27] total 46 [2022-07-22 11:06:54,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708488249] [2022-07-22 11:06:54,965 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:06:54,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-22 11:06:54,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:06:54,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-22 11:06:54,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1913, Unknown=0, NotChecked=0, Total=2070 [2022-07-22 11:06:54,968 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) [2022-07-22 11:06:55,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:06:55,756 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2022-07-22 11:06:55,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-22 11:06:55,756 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 [2022-07-22 11:06:55,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:06:55,758 INFO L225 Difference]: With dead ends: 46 [2022-07-22 11:06:55,759 INFO L226 Difference]: Without dead ends: 40 [2022-07-22 11:06:55,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=414, Invalid=3746, Unknown=0, NotChecked=0, Total=4160 [2022-07-22 11:06:55,761 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, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:06:55,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 299 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 338 Invalid, 0 Unknown, 289 Unchecked, 0.2s Time] [2022-07-22 11:06:55,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-22 11:06:55,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-07-22 11:06:55,767 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) [2022-07-22 11:06:55,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-07-22 11:06:55,768 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 53 [2022-07-22 11:06:55,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:06:55,769 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-07-22 11:06:55,769 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) [2022-07-22 11:06:55,769 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-07-22 11:06:55,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 11:06:55,770 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:06:55,771 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:06:55,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-22 11:06:55,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:06:55,981 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:06:55,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:06:55,982 INFO L85 PathProgramCache]: Analyzing trace with hash 788849844, now seen corresponding path program 5 times [2022-07-22 11:06:55,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:06:55,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [543220299] [2022-07-22 11:06:55,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 11:06:55,983 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:06:55,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:06:55,984 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) [2022-07-22 11:06:55,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-22 11:06:56,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-22 11:06:56,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:06:56,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-22 11:06:56,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:06:56,488 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-07-22 11:06:56,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:07:00,085 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 11:07:00,086 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:07:00,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [543220299] [2022-07-22 11:07:00,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [543220299] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:07:00,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:07:00,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 33] total 56 [2022-07-22 11:07:00,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110812252] [2022-07-22 11:07:00,087 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:07:00,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-22 11:07:00,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:07:00,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-22 11:07:00,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2885, Unknown=0, NotChecked=0, Total=3080 [2022-07-22 11:07:00,090 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) [2022-07-22 11:07:01,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:07:01,157 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2022-07-22 11:07:01,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-22 11:07:01,157 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 [2022-07-22 11:07:01,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:07:01,158 INFO L225 Difference]: With dead ends: 52 [2022-07-22 11:07:01,159 INFO L226 Difference]: Without dead ends: 46 [2022-07-22 11:07:01,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=554, Invalid=5608, Unknown=0, NotChecked=0, Total=6162 [2022-07-22 11:07:01,161 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 74 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-07-22 11:07:01,161 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] [2022-07-22 11:07:01,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-22 11:07:01,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-07-22 11:07:01,167 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) [2022-07-22 11:07:01,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2022-07-22 11:07:01,168 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 65 [2022-07-22 11:07:01,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:07:01,169 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2022-07-22 11:07:01,169 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) [2022-07-22 11:07:01,169 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2022-07-22 11:07:01,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-22 11:07:01,171 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:07:01,171 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:07:01,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-22 11:07:01,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:07:01,381 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:07:01,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:07:01,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1302253684, now seen corresponding path program 6 times [2022-07-22 11:07:01,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:07:01,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [416096821] [2022-07-22 11:07:01,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 11:07:01,382 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:07:01,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:07:01,383 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) [2022-07-22 11:07:01,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-22 11:07:01,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-07-22 11:07:01,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:07:01,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-22 11:07:01,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:07:02,016 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-07-22 11:07:02,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:07:06,635 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-22 11:07:06,636 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:07:06,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [416096821] [2022-07-22 11:07:06,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [416096821] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:07:06,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:07:06,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 39] total 66 [2022-07-22 11:07:06,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398285218] [2022-07-22 11:07:06,637 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:07:06,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-22 11:07:06,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:07:06,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-22 11:07:06,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=4057, Unknown=0, NotChecked=0, Total=4290 [2022-07-22 11:07:06,640 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) [2022-07-22 11:07:07,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:07:07,973 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2022-07-22 11:07:07,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-22 11:07:07,974 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 [2022-07-22 11:07:07,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:07:07,975 INFO L225 Difference]: With dead ends: 58 [2022-07-22 11:07:07,975 INFO L226 Difference]: Without dead ends: 52 [2022-07-22 11:07:07,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=710, Invalid=7846, Unknown=0, NotChecked=0, Total=8556 [2022-07-22 11:07:07,978 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, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:07:07,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 647 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 629 Invalid, 0 Unknown, 650 Unchecked, 0.3s Time] [2022-07-22 11:07:07,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-22 11:07:07,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-07-22 11:07:07,984 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) [2022-07-22 11:07:07,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2022-07-22 11:07:07,985 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 77 [2022-07-22 11:07:07,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:07:07,985 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2022-07-22 11:07:07,986 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) [2022-07-22 11:07:07,986 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2022-07-22 11:07:07,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-22 11:07:07,987 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:07:07,987 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:07:07,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-22 11:07:08,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:07:08,196 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:07:08,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:07:08,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1287742412, now seen corresponding path program 7 times [2022-07-22 11:07:08,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:07:08,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [141026343] [2022-07-22 11:07:08,196 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 11:07:08,197 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:07:08,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:07:08,198 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) [2022-07-22 11:07:08,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-22 11:07:08,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:07:08,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-22 11:07:08,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:07:09,020 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-07-22 11:07:09,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:07:15,128 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-22 11:07:15,129 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:07:15,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [141026343] [2022-07-22 11:07:15,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [141026343] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:07:15,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:07:15,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 45] total 76 [2022-07-22 11:07:15,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990791108] [2022-07-22 11:07:15,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:07:15,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-07-22 11:07:15,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:07:15,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-07-22 11:07:15,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=5429, Unknown=0, NotChecked=0, Total=5700 [2022-07-22 11:07:15,132 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) [2022-07-22 11:07:16,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:07:16,771 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2022-07-22 11:07:16,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-22 11:07:16,771 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 [2022-07-22 11:07:16,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:07:16,773 INFO L225 Difference]: With dead ends: 64 [2022-07-22 11:07:16,773 INFO L226 Difference]: Without dead ends: 58 [2022-07-22 11:07:16,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=882, Invalid=10460, Unknown=0, NotChecked=0, Total=11342 [2022-07-22 11:07:16,776 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 127 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2022-07-22 11:07:16,776 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] [2022-07-22 11:07:16,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-22 11:07:16,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-07-22 11:07:16,782 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) [2022-07-22 11:07:16,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-07-22 11:07:16,783 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 89 [2022-07-22 11:07:16,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:07:16,783 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-07-22 11:07:16,784 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) [2022-07-22 11:07:16,784 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-07-22 11:07:16,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-22 11:07:16,796 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:07:16,796 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:07:16,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-22 11:07:16,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:07:16,997 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:07:16,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:07:16,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1760839668, now seen corresponding path program 8 times [2022-07-22 11:07:16,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:07:16,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1915710583] [2022-07-22 11:07:16,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 11:07:16,998 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:07:16,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:07:16,999 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) [2022-07-22 11:07:17,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-22 11:07:17,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 11:07:17,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:07:17,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-22 11:07:17,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:07:17,893 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-07-22 11:07:17,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:07:25,436 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-22 11:07:25,436 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:07:25,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1915710583] [2022-07-22 11:07:25,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1915710583] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:07:25,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:07:25,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 51] total 86 [2022-07-22 11:07:25,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525546117] [2022-07-22 11:07:25,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:07:25,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-07-22 11:07:25,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:07:25,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-07-22 11:07:25,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=7001, Unknown=0, NotChecked=0, Total=7310 [2022-07-22 11:07:25,440 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) [2022-07-22 11:07:27,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:07:27,438 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2022-07-22 11:07:27,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-22 11:07:27,438 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 [2022-07-22 11:07:27,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:07:27,439 INFO L225 Difference]: With dead ends: 70 [2022-07-22 11:07:27,439 INFO L226 Difference]: Without dead ends: 64 [2022-07-22 11:07:27,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1906 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1070, Invalid=13450, Unknown=0, NotChecked=0, Total=14520 [2022-07-22 11:07:27,443 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 [2022-07-22 11:07:27,444 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] [2022-07-22 11:07:27,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-22 11:07:27,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-07-22 11:07:27,449 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) [2022-07-22 11:07:27,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2022-07-22 11:07:27,450 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 101 [2022-07-22 11:07:27,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:07:27,450 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2022-07-22 11:07:27,451 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) [2022-07-22 11:07:27,451 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2022-07-22 11:07:27,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-22 11:07:27,452 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:07:27,452 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:07:27,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-22 11:07:27,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:07:27,662 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:07:27,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:07:27,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1211116620, now seen corresponding path program 9 times [2022-07-22 11:07:27,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:07:27,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1773571793] [2022-07-22 11:07:27,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 11:07:27,663 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:07:27,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:07:27,664 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) [2022-07-22 11:07:27,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-22 11:07:27,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-07-22 11:07:27,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:07:27,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-22 11:07:27,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:07:28,673 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-07-22 11:07:28,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:07:38,304 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-22 11:07:38,304 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:07:38,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1773571793] [2022-07-22 11:07:38,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1773571793] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:07:38,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:07:38,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 57] total 96 [2022-07-22 11:07:38,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059429706] [2022-07-22 11:07:38,304 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:07:38,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-07-22 11:07:38,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:07:38,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-07-22 11:07:38,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=8773, Unknown=0, NotChecked=0, Total=9120 [2022-07-22 11:07:38,307 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) [2022-07-22 11:07:40,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:07:40,306 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2022-07-22 11:07:40,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-22 11:07:40,306 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 [2022-07-22 11:07:40,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:07:40,308 INFO L225 Difference]: With dead ends: 71 [2022-07-22 11:07:40,308 INFO L226 Difference]: Without dead ends: 67 [2022-07-22 11:07:40,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2227 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1185, Invalid=15845, Unknown=0, NotChecked=0, Total=17030 [2022-07-22 11:07:40,310 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 [2022-07-22 11:07:40,310 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] [2022-07-22 11:07:40,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-22 11:07:40,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-07-22 11:07:40,318 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) [2022-07-22 11:07:40,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2022-07-22 11:07:40,319 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 113 [2022-07-22 11:07:40,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:07:40,319 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2022-07-22 11:07:40,320 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) [2022-07-22 11:07:40,320 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2022-07-22 11:07:40,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-22 11:07:40,321 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:07:40,321 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:07:40,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-22 11:07:40,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:07:40,522 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:07:40,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:07:40,522 INFO L85 PathProgramCache]: Analyzing trace with hash 79612228, now seen corresponding path program 10 times [2022-07-22 11:07:40,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:07:40,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1995329246] [2022-07-22 11:07:40,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 11:07:40,523 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:07:40,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:07:40,524 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) [2022-07-22 11:07:40,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-22 11:07:40,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 11:07:40,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:07:40,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-22 11:07:40,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:07:41,620 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-07-22 11:07:41,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:07:52,124 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 819 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-07-22 11:07:52,124 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:07:52,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1995329246] [2022-07-22 11:07:52,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1995329246] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:07:52,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:07:52,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 60] total 101 [2022-07-22 11:07:52,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271988624] [2022-07-22 11:07:52,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:07:52,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-07-22 11:07:52,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:07:52,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-07-22 11:07:52,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=9734, Unknown=0, NotChecked=0, Total=10100 [2022-07-22 11:07:52,127 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) [2022-07-22 11:07:57,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:07:57,279 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2022-07-22 11:07:57,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-22 11:07:57,280 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 [2022-07-22 11:07:57,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:07:57,281 INFO L225 Difference]: With dead ends: 79 [2022-07-22 11:07:57,281 INFO L226 Difference]: Without dead ends: 73 [2022-07-22 11:07:57,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2676 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=1011, Invalid=19295, Unknown=0, NotChecked=0, Total=20306 [2022-07-22 11:07:57,284 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 [2022-07-22 11:07:57,284 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] [2022-07-22 11:07:57,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-22 11:07:57,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-07-22 11:07:57,289 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) [2022-07-22 11:07:57,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2022-07-22 11:07:57,290 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 119 [2022-07-22 11:07:57,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:07:57,290 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2022-07-22 11:07:57,290 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) [2022-07-22 11:07:57,291 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2022-07-22 11:07:57,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-22 11:07:57,292 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:07:57,292 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:07:57,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-22 11:07:57,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:07:57,500 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:07:57,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:07:57,500 INFO L85 PathProgramCache]: Analyzing trace with hash 720478468, now seen corresponding path program 11 times [2022-07-22 11:07:57,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:07:57,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1817250250] [2022-07-22 11:07:57,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 11:07:57,500 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:07:57,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:07:57,502 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) [2022-07-22 11:07:57,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-22 11:07:57,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2022-07-22 11:07:57,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:07:57,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-22 11:07:57,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:07:58,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2022-07-22 11:07:58,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:08:11,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 1010 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-07-22 11:08:11,292 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:08:11,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1817250250] [2022-07-22 11:08:11,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1817250250] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:08:11,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:08:11,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 66] total 111 [2022-07-22 11:08:11,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355831430] [2022-07-22 11:08:11,292 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:08:11,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-07-22 11:08:11,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:08:11,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-07-22 11:08:11,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=11806, Unknown=0, NotChecked=0, Total=12210 [2022-07-22 11:08:11,295 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) [2022-07-22 11:08:13,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:08:13,700 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2022-07-22 11:08:13,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-22 11:08:13,700 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 [2022-07-22 11:08:13,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:08:13,701 INFO L225 Difference]: With dead ends: 80 [2022-07-22 11:08:13,701 INFO L226 Difference]: Without dead ends: 76 [2022-07-22 11:08:13,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3007 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=1509, Invalid=21443, Unknown=0, NotChecked=0, Total=22952 [2022-07-22 11:08:13,703 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 [2022-07-22 11:08:13,703 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] [2022-07-22 11:08:13,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-22 11:08:13,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-07-22 11:08:13,708 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) [2022-07-22 11:08:13,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2022-07-22 11:08:13,709 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 131 [2022-07-22 11:08:13,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:08:13,709 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2022-07-22 11:08:13,709 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) [2022-07-22 11:08:13,709 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2022-07-22 11:08:13,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-07-22 11:08:13,711 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:08:13,711 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:08:13,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-07-22 11:08:13,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:08:13,919 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:08:13,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:08:13,920 INFO L85 PathProgramCache]: Analyzing trace with hash -2059891916, now seen corresponding path program 12 times [2022-07-22 11:08:13,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:08:13,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1709758144] [2022-07-22 11:08:13,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 11:08:13,920 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:08:13,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:08:13,921 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) [2022-07-22 11:08:13,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-22 11:08:14,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-07-22 11:08:14,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:08:14,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 92 conjunts are in the unsatisfiable core [2022-07-22 11:08:14,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:08:15,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2022-07-22 11:08:15,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:08:28,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1113 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-07-22 11:08:28,771 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:08:28,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1709758144] [2022-07-22 11:08:28,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1709758144] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:08:28,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:08:28,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 69] total 116 [2022-07-22 11:08:28,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577491051] [2022-07-22 11:08:28,771 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:08:28,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-07-22 11:08:28,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:08:28,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-07-22 11:08:28,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=12917, Unknown=0, NotChecked=0, Total=13340 [2022-07-22 11:08:28,774 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) [2022-07-22 11:08:31,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:08:31,812 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2022-07-22 11:08:31,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-22 11:08:31,812 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 [2022-07-22 11:08:31,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:08:31,813 INFO L225 Difference]: With dead ends: 88 [2022-07-22 11:08:31,813 INFO L226 Difference]: Without dead ends: 82 [2022-07-22 11:08:31,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3475 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=1730, Invalid=24676, Unknown=0, NotChecked=0, Total=26406 [2022-07-22 11:08:31,816 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 160 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 1398 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:08:31,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 1719 Invalid, 3732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 1398 Invalid, 0 Unknown, 2058 Unchecked, 0.7s Time] [2022-07-22 11:08:31,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-22 11:08:31,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-07-22 11:08:31,821 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) [2022-07-22 11:08:31,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2022-07-22 11:08:31,827 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 137 [2022-07-22 11:08:31,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:08:31,830 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2022-07-22 11:08:31,830 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) [2022-07-22 11:08:31,830 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2022-07-22 11:08:31,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-07-22 11:08:31,831 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:08:31,831 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:08:31,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-22 11:08:32,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:08:32,041 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:08:32,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:08:32,042 INFO L85 PathProgramCache]: Analyzing trace with hash -706365708, now seen corresponding path program 13 times [2022-07-22 11:08:32,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:08:32,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2035187958] [2022-07-22 11:08:32,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 11:08:32,043 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:08:32,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:08:32,044 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) [2022-07-22 11:08:32,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-22 11:08:32,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:08:32,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 100 conjunts are in the unsatisfiable core [2022-07-22 11:08:32,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:08:33,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2022-07-22 11:08:33,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:08:49,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-07-22 11:08:49,397 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:08:49,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2035187958] [2022-07-22 11:08:49,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2035187958] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:08:49,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:08:49,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 75] total 126 [2022-07-22 11:08:49,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479928695] [2022-07-22 11:08:49,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:08:49,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-07-22 11:08:49,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:08:49,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-07-22 11:08:49,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=15289, Unknown=0, NotChecked=0, Total=15750 [2022-07-22 11:08:49,404 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) [2022-07-22 11:08:53,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:08:53,184 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2022-07-22 11:08:53,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-22 11:08:53,185 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 [2022-07-22 11:08:53,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:08:53,186 INFO L225 Difference]: With dead ends: 94 [2022-07-22 11:08:53,186 INFO L226 Difference]: Without dead ends: 88 [2022-07-22 11:08:53,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4102 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=1982, Invalid=29170, Unknown=0, NotChecked=0, Total=31152 [2022-07-22 11:08:53,188 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, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:08:53,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 1860 Invalid, 5133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [953 Valid, 1798 Invalid, 0 Unknown, 2382 Unchecked, 1.0s Time] [2022-07-22 11:08:53,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-22 11:08:53,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-07-22 11:08:53,193 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) [2022-07-22 11:08:53,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2022-07-22 11:08:53,194 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 149 [2022-07-22 11:08:53,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:08:53,194 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2022-07-22 11:08:53,195 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) [2022-07-22 11:08:53,195 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2022-07-22 11:08:53,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-07-22 11:08:53,196 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:08:53,197 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:08:53,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-22 11:08:53,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:08:53,413 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:08:53,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:08:53,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1677247156, now seen corresponding path program 14 times [2022-07-22 11:08:53,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:08:53,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [987122169] [2022-07-22 11:08:53,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 11:08:53,414 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:08:53,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:08:53,416 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) [2022-07-22 11:08:53,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-22 11:08:53,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 11:08:53,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:08:53,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 108 conjunts are in the unsatisfiable core [2022-07-22 11:08:53,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:08:55,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2022-07-22 11:08:55,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:09:13,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 1575 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-07-22 11:09:13,585 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:09:13,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [987122169] [2022-07-22 11:09:13,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [987122169] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:09:13,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:09:13,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 81] total 136 [2022-07-22 11:09:13,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491581108] [2022-07-22 11:09:13,585 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:09:13,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-07-22 11:09:13,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:09:13,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-07-22 11:09:13,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=17861, Unknown=0, NotChecked=0, Total=18360 [2022-07-22 11:09:13,588 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) [2022-07-22 11:09:17,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:09:17,975 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2022-07-22 11:09:17,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-22 11:09:17,975 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 [2022-07-22 11:09:17,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:09:17,976 INFO L225 Difference]: With dead ends: 100 [2022-07-22 11:09:17,976 INFO L226 Difference]: Without dead ends: 94 [2022-07-22 11:09:17,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4781 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=2250, Invalid=34040, Unknown=0, NotChecked=0, Total=36290 [2022-07-22 11:09:17,979 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 [2022-07-22 11:09:17,979 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] [2022-07-22 11:09:17,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-22 11:09:17,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-07-22 11:09:17,984 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) [2022-07-22 11:09:17,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2022-07-22 11:09:17,984 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 161 [2022-07-22 11:09:17,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:09:17,985 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2022-07-22 11:09:17,985 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) [2022-07-22 11:09:17,985 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2022-07-22 11:09:17,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-07-22 11:09:17,986 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:09:17,987 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:09:17,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-22 11:09:18,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:09:18,195 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:09:18,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:09:18,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1199460748, now seen corresponding path program 15 times [2022-07-22 11:09:18,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:09:18,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [555228093] [2022-07-22 11:09:18,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 11:09:18,196 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:09:18,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:09:18,197 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) [2022-07-22 11:09:18,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-22 11:09:18,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-07-22 11:09:18,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:09:18,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 116 conjunts are in the unsatisfiable core [2022-07-22 11:09:18,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:09:20,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2022-07-22 11:09:20,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:09:41,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1836 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-07-22 11:09:41,498 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:09:41,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [555228093] [2022-07-22 11:09:41,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [555228093] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:09:41,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:09:41,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 87] total 146 [2022-07-22 11:09:41,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733730165] [2022-07-22 11:09:41,499 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:09:41,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-07-22 11:09:41,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:09:41,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-07-22 11:09:41,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=20633, Unknown=0, NotChecked=0, Total=21170 [2022-07-22 11:09:41,501 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) [2022-07-22 11:09:46,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:09:46,221 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2022-07-22 11:09:46,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-22 11:09:46,223 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 173 [2022-07-22 11:09:46,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:09:46,224 INFO L225 Difference]: With dead ends: 106 [2022-07-22 11:09:46,224 INFO L226 Difference]: Without dead ends: 100 [2022-07-22 11:09:46,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5512 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=2534, Invalid=39286, Unknown=0, NotChecked=0, Total=41820 [2022-07-22 11:09:46,226 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 575 mSDsluCounter, 2400 mSDsCounter, 0 mSdLazyCounter, 2034 mSolverCounterSat, 925 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 2435 SdHoareTripleChecker+Invalid, 6205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 925 IncrementalHoareTripleChecker+Valid, 2034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3246 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:09:46,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [608 Valid, 2435 Invalid, 6205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [925 Valid, 2034 Invalid, 0 Unknown, 3246 Unchecked, 1.0s Time] [2022-07-22 11:09:46,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-22 11:09:46,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-07-22 11:09:46,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 68 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 30 states have return successors, (31), 30 states have call predecessors, (31), 2 states have call successors, (31) [2022-07-22 11:09:46,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2022-07-22 11:09:46,235 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 173 [2022-07-22 11:09:46,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:09:46,235 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2022-07-22 11:09:46,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2022-07-22 11:09:46,235 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2022-07-22 11:09:46,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-07-22 11:09:46,236 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:09:46,236 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:09:46,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-22 11:09:46,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:09:46,439 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:09:46,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:09:46,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1668253132, now seen corresponding path program 16 times [2022-07-22 11:09:46,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:09:46,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [416088606] [2022-07-22 11:09:46,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 11:09:46,440 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:09:46,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:09:46,442 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:09:46,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-22 11:09:46,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 11:09:46,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:09:46,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 124 conjunts are in the unsatisfiable core [2022-07-22 11:09:46,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:09:48,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2022-07-22 11:09:48,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:10:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 2117 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2022-07-22 11:10:13,024 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:10:13,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [416088606] [2022-07-22 11:10:13,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [416088606] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:10:13,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:10:13,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 93] total 156 [2022-07-22 11:10:13,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661981279] [2022-07-22 11:10:13,025 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:10:13,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2022-07-22 11:10:13,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:10:13,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2022-07-22 11:10:13,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=23605, Unknown=0, NotChecked=0, Total=24180 [2022-07-22 11:10:13,027 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 156 states, 155 states have (on average 1.2258064516129032) internal successors, (190), 96 states have internal predecessors, (190), 32 states have call successors, (32), 1 states have call predecessors, (32), 60 states have return successors, (60), 60 states have call predecessors, (60), 32 states have call successors, (60) [2022-07-22 11:10:18,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:10:18,386 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2022-07-22 11:10:18,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-22 11:10:18,387 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 155 states have (on average 1.2258064516129032) internal successors, (190), 96 states have internal predecessors, (190), 32 states have call successors, (32), 1 states have call predecessors, (32), 60 states have return successors, (60), 60 states have call predecessors, (60), 32 states have call successors, (60) Word has length 185 [2022-07-22 11:10:18,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:10:18,388 INFO L225 Difference]: With dead ends: 112 [2022-07-22 11:10:18,388 INFO L226 Difference]: Without dead ends: 106 [2022-07-22 11:10:18,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6295 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=2834, Invalid=44908, Unknown=0, NotChecked=0, Total=47742 [2022-07-22 11:10:18,392 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 411 mSDsluCounter, 3089 mSDsCounter, 0 mSdLazyCounter, 2661 mSolverCounterSat, 721 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 3126 SdHoareTripleChecker+Invalid, 7075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 721 IncrementalHoareTripleChecker+Valid, 2661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3693 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:10:18,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 3126 Invalid, 7075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [721 Valid, 2661 Invalid, 0 Unknown, 3693 Unchecked, 1.2s Time] [2022-07-22 11:10:18,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-07-22 11:10:18,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-07-22 11:10:18,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 72 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (33), 32 states have call predecessors, (33), 2 states have call successors, (33) [2022-07-22 11:10:18,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2022-07-22 11:10:18,397 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 185 [2022-07-22 11:10:18,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:10:18,397 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2022-07-22 11:10:18,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 155 states have (on average 1.2258064516129032) internal successors, (190), 96 states have internal predecessors, (190), 32 states have call successors, (32), 1 states have call predecessors, (32), 60 states have return successors, (60), 60 states have call predecessors, (60), 32 states have call successors, (60) [2022-07-22 11:10:18,398 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2022-07-22 11:10:18,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-07-22 11:10:18,399 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:10:18,399 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:10:18,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-22 11:10:18,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:10:18,603 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:10:18,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:10:18,604 INFO L85 PathProgramCache]: Analyzing trace with hash 422913524, now seen corresponding path program 17 times [2022-07-22 11:10:18,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:10:18,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1549798164] [2022-07-22 11:10:18,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 11:10:18,605 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:10:18,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:10:18,606 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:10:18,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-22 11:10:18,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2022-07-22 11:10:18,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-07-22 11:10:18,959 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 11:10:19,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 11:10:19,105 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2022-07-22 11:10:19,105 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 11:10:19,106 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-22 11:10:19,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-22 11:10:19,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:10:19,323 INFO L356 BasicCegarLoop]: Path program histogram: [17, 1] [2022-07-22 11:10:19,326 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-22 11:10:19,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.07 11:10:19 BoogieIcfgContainer [2022-07-22 11:10:19,393 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-22 11:10:19,394 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-22 11:10:19,394 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-22 11:10:19,394 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-22 11:10:19,394 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:06:44" (3/4) ... [2022-07-22 11:10:19,395 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-22 11:10:19,451 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-22 11:10:19,451 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-22 11:10:19,451 INFO L158 Benchmark]: Toolchain (without parser) took 215531.47ms. Allocated memory was 50.3MB in the beginning and 142.6MB in the end (delta: 92.3MB). Free memory was 27.9MB in the beginning and 65.4MB in the end (delta: -37.6MB). Peak memory consumption was 54.0MB. Max. memory is 16.1GB. [2022-07-22 11:10:19,452 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 50.3MB. Free memory was 33.0MB in the beginning and 32.9MB in the end (delta: 46.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 11:10:19,452 INFO L158 Benchmark]: CACSL2BoogieTranslator took 204.64ms. Allocated memory was 50.3MB in the beginning and 65.0MB in the end (delta: 14.7MB). Free memory was 27.7MB in the beginning and 48.2MB in the end (delta: -20.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-22 11:10:19,452 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.82ms. Allocated memory is still 65.0MB. Free memory was 48.2MB in the beginning and 48.8MB in the end (delta: -538.3kB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. [2022-07-22 11:10:19,453 INFO L158 Benchmark]: Boogie Preprocessor took 47.81ms. Allocated memory is still 65.0MB. Free memory was 48.8MB in the beginning and 47.8MB in the end (delta: 963.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 11:10:19,453 INFO L158 Benchmark]: RCFGBuilder took 291.03ms. Allocated memory is still 65.0MB. Free memory was 47.8MB in the beginning and 39.2MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-22 11:10:19,453 INFO L158 Benchmark]: TraceAbstraction took 214889.93ms. Allocated memory was 65.0MB in the beginning and 142.6MB in the end (delta: 77.6MB). Free memory was 38.6MB in the beginning and 69.6MB in the end (delta: -31.0MB). Peak memory consumption was 48.6MB. Max. memory is 16.1GB. [2022-07-22 11:10:19,454 INFO L158 Benchmark]: Witness Printer took 57.53ms. Allocated memory is still 142.6MB. Free memory was 69.6MB in the beginning and 65.4MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-22 11:10:19,455 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 50.3MB. Free memory was 33.0MB in the beginning and 32.9MB in the end (delta: 46.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 204.64ms. Allocated memory was 50.3MB in the beginning and 65.0MB in the end (delta: 14.7MB). Free memory was 27.7MB in the beginning and 48.2MB in the end (delta: -20.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.82ms. Allocated memory is still 65.0MB. Free memory was 48.2MB in the beginning and 48.8MB in the end (delta: -538.3kB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 47.81ms. Allocated memory is still 65.0MB. Free memory was 48.8MB in the beginning and 47.8MB in the end (delta: 963.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 291.03ms. Allocated memory is still 65.0MB. Free memory was 47.8MB in the beginning and 39.2MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 214889.93ms. Allocated memory was 65.0MB in the beginning and 142.6MB in the end (delta: 77.6MB). Free memory was 38.6MB in the beginning and 69.6MB in the end (delta: -31.0MB). Peak memory consumption was 48.6MB. Max. memory is 16.1GB. * Witness Printer took 57.53ms. Allocated memory is still 142.6MB. Free memory was 69.6MB in the beginning and 65.4MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. 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 - CounterExampleResult [Line: 36]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L27] int n = __VERIFIER_nondet_int(); [L28] COND FALSE !(n < 1) VAL [n=32] [L31] CALL, EXPR hanoi(n) VAL [\old(n)=32] [L19] COND FALSE !(n == 1) VAL [\old(n)=32, n=32] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=31] [L19] COND FALSE !(n == 1) VAL [\old(n)=31, n=31] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=30] [L19] COND FALSE !(n == 1) VAL [\old(n)=30, n=30] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=29] [L19] COND FALSE !(n == 1) VAL [\old(n)=29, n=29] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=28] [L19] COND FALSE !(n == 1) VAL [\old(n)=28, n=28] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=27] [L19] COND FALSE !(n == 1) VAL [\old(n)=27, n=27] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=26] [L19] COND FALSE !(n == 1) VAL [\old(n)=26, n=26] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=25] [L19] COND FALSE !(n == 1) VAL [\old(n)=25, n=25] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=24] [L19] COND FALSE !(n == 1) VAL [\old(n)=24, n=24] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=23] [L19] COND FALSE !(n == 1) VAL [\old(n)=23, n=23] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=22] [L19] COND FALSE !(n == 1) VAL [\old(n)=22, n=22] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=21] [L19] COND FALSE !(n == 1) VAL [\old(n)=21, n=21] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=20] [L19] COND FALSE !(n == 1) VAL [\old(n)=20, n=20] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=19] [L19] COND FALSE !(n == 1) VAL [\old(n)=19, n=19] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=18] [L19] COND FALSE !(n == 1) VAL [\old(n)=18, n=18] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=17] [L19] COND FALSE !(n == 1) VAL [\old(n)=17, n=17] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=16] [L19] COND FALSE !(n == 1) VAL [\old(n)=16, n=16] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=15] [L19] COND FALSE !(n == 1) VAL [\old(n)=15, n=15] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=14] [L19] COND FALSE !(n == 1) VAL [\old(n)=14, n=14] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=13] [L19] COND FALSE !(n == 1) VAL [\old(n)=13, n=13] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=12] [L19] COND FALSE !(n == 1) VAL [\old(n)=12, n=12] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=11] [L19] COND FALSE !(n == 1) VAL [\old(n)=11, n=11] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=10] [L19] COND FALSE !(n == 1) VAL [\old(n)=10, n=10] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=9] [L19] COND FALSE !(n == 1) VAL [\old(n)=9, n=9] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=8] [L19] COND FALSE !(n == 1) VAL [\old(n)=8, n=8] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=7] [L19] COND FALSE !(n == 1) VAL [\old(n)=7, n=7] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=6] [L19] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=5] [L19] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=4] [L19] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=3] [L19] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=2] [L19] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=2, hanoi(n-1)=1, n=2] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=3, hanoi(n-1)=3, n=3] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=4, hanoi(n-1)=7, n=4] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=5, hanoi(n-1)=15, n=5] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=6, hanoi(n-1)=31, n=6] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=7, hanoi(n-1)=63, n=7] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=8, hanoi(n-1)=127, n=8] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=9, hanoi(n-1)=255, n=9] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=10, hanoi(n-1)=511, n=10] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=11, hanoi(n-1)=1023, n=11] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=12, hanoi(n-1)=2047, n=12] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=13, hanoi(n-1)=4095, n=13] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=14, hanoi(n-1)=8191, n=14] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=15, hanoi(n-1)=16383, n=15] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=16, hanoi(n-1)=32767, n=16] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=17, hanoi(n-1)=65535, n=17] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=18, hanoi(n-1)=131071, n=18] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=19, hanoi(n-1)=262143, n=19] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=20, hanoi(n-1)=524287, n=20] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=21, hanoi(n-1)=1048575, n=21] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=22, hanoi(n-1)=2097151, n=22] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=23, hanoi(n-1)=4194303, n=23] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=24, hanoi(n-1)=8388607, n=24] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=25, hanoi(n-1)=16777215, n=25] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=26, hanoi(n-1)=33554431, n=26] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=27, hanoi(n-1)=67108863, n=27] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=28, hanoi(n-1)=134217727, n=28] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=29, hanoi(n-1)=268435455, n=29] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=30, hanoi(n-1)=536870911, n=30] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=31, hanoi(n-1)=1073741823, n=31] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=32, hanoi(n-1)=2147483647, n=32] [L22] return 2 * (hanoi(n-1)) + 1; [L31] RET, EXPR hanoi(n) VAL [hanoi(n)=-1, n=32] [L31] unsigned result = hanoi(n); [L33] COND FALSE !(result+1>0 && result+1 == 1<