./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 e19ca921 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-dev-e19ca92 [2021-12-22 08:33:37,513 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 08:33:37,515 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 08:33:37,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 08:33:37,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 08:33:37,581 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 08:33:37,582 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 08:33:37,587 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 08:33:37,589 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 08:33:37,593 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 08:33:37,594 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 08:33:37,595 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 08:33:37,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 08:33:37,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 08:33:37,598 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 08:33:37,601 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 08:33:37,602 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 08:33:37,603 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 08:33:37,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 08:33:37,610 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 08:33:37,611 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 08:33:37,612 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 08:33:37,613 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 08:33:37,614 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 08:33:37,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 08:33:37,616 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 08:33:37,616 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 08:33:37,618 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 08:33:37,618 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 08:33:37,619 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 08:33:37,619 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 08:33:37,620 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 08:33:37,621 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 08:33:37,622 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 08:33:37,623 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 08:33:37,623 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 08:33:37,624 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 08:33:37,624 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 08:33:37,624 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 08:33:37,625 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 08:33:37,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 08:33:37,628 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 08:33:37,657 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 08:33:37,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 08:33:37,658 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 08:33:37,658 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 08:33:37,659 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 08:33:37,659 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 08:33:37,660 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 08:33:37,660 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 08:33:37,660 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 08:33:37,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 08:33:37,661 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 08:33:37,662 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 08:33:37,662 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 08:33:37,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 08:33:37,662 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 08:33:37,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 08:33:37,663 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 08:33:37,663 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 08:33:37,663 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 08:33:37,663 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 08:33:37,663 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 08:33:37,664 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 08:33:37,664 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 08:33:37,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 08:33:37,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:33:37,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 08:33:37,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 08:33:37,666 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 08:33:37,666 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 08:33:37,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 08:33:37,667 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 08:33:37,667 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 08:33:37,667 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 08:33:37,667 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 08:33:37,667 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a58a565ed7a29809aaccd8966118196fec0a697f2fc6db04cc260beeab4df83 [2021-12-22 08:33:37,870 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 08:33:37,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 08:33:37,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 08:33:37,904 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 08:33:37,905 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 08:33:37,906 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2021-12-22 08:33:37,959 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/966df9305/2a722c2a5ac248afadd4a429b8d77f9e/FLAGafa5c5ae3 [2021-12-22 08:33:38,308 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 08:33:38,309 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2021-12-22 08:33:38,318 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/966df9305/2a722c2a5ac248afadd4a429b8d77f9e/FLAGafa5c5ae3 [2021-12-22 08:33:38,726 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/966df9305/2a722c2a5ac248afadd4a429b8d77f9e [2021-12-22 08:33:38,731 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 08:33:38,732 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 08:33:38,736 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 08:33:38,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 08:33:38,739 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 08:33:38,740 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:33:38" (1/1) ... [2021-12-22 08:33:38,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@364e60b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:38, skipping insertion in model container [2021-12-22 08:33:38,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:33:38" (1/1) ... [2021-12-22 08:33:38,746 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 08:33:38,756 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 08:33:38,885 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] [2021-12-22 08:33:38,888 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:33:38,898 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 08:33:38,916 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] [2021-12-22 08:33:38,917 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:33:38,929 INFO L208 MainTranslator]: Completed translation [2021-12-22 08:33:38,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:38 WrapperNode [2021-12-22 08:33:38,929 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 08:33:38,931 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 08:33:38,931 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 08:33:38,931 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 08:33:38,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:38" (1/1) ... [2021-12-22 08:33:38,948 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:38" (1/1) ... [2021-12-22 08:33:38,963 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 25 [2021-12-22 08:33:38,963 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 08:33:38,964 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 08:33:38,964 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 08:33:38,964 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 08:33:38,970 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:38" (1/1) ... [2021-12-22 08:33:38,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:38" (1/1) ... [2021-12-22 08:33:38,971 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:38" (1/1) ... [2021-12-22 08:33:38,971 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:38" (1/1) ... [2021-12-22 08:33:38,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:38" (1/1) ... [2021-12-22 08:33:38,977 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:38" (1/1) ... [2021-12-22 08:33:38,979 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:38" (1/1) ... [2021-12-22 08:33:38,980 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 08:33:38,981 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 08:33:38,981 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 08:33:38,981 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 08:33:38,982 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:38" (1/1) ... [2021-12-22 08:33:38,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:33:39,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:33:39,019 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 08:33:39,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 08:33:39,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 08:33:39,057 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2021-12-22 08:33:39,058 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2021-12-22 08:33:39,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 08:33:39,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 08:33:39,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 08:33:39,103 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 08:33:39,105 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 08:33:39,179 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 08:33:39,184 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 08:33:39,184 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 08:33:39,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:33:39 BoogieIcfgContainer [2021-12-22 08:33:39,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 08:33:39,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 08:33:39,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 08:33:39,192 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 08:33:39,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:33:38" (1/3) ... [2021-12-22 08:33:39,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@713bd348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:33:39, skipping insertion in model container [2021-12-22 08:33:39,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:38" (2/3) ... [2021-12-22 08:33:39,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@713bd348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:33:39, skipping insertion in model container [2021-12-22 08:33:39,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:33:39" (3/3) ... [2021-12-22 08:33:39,196 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi03-1.c [2021-12-22 08:33:39,200 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 08:33:39,200 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 08:33:39,239 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 08:33:39,246 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 08:33:39,246 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 08:33:39,260 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) [2021-12-22 08:33:39,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-22 08:33:39,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:39,265 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:33:39,265 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:39,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:39,270 INFO L85 PathProgramCache]: Analyzing trace with hash -2087939196, now seen corresponding path program 1 times [2021-12-22 08:33:39,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:39,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064736272] [2021-12-22 08:33:39,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:39,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:39,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 08:33:39,400 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 08:33:39,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 08:33:39,456 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 08:33:39,458 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-22 08:33:39,459 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-22 08:33:39,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 08:33:39,465 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-12-22 08:33:39,467 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-22 08:33:39,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 08:33:39 BoogieIcfgContainer [2021-12-22 08:33:39,487 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-22 08:33:39,490 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-22 08:33:39,490 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-22 08:33:39,491 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-22 08:33:39,491 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:33:39" (3/4) ... [2021-12-22 08:33:39,494 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-22 08:33:39,494 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-22 08:33:39,496 INFO L158 Benchmark]: Toolchain (without parser) took 762.74ms. Allocated memory was 90.2MB in the beginning and 113.2MB in the end (delta: 23.1MB). Free memory was 57.5MB in the beginning and 64.9MB in the end (delta: -7.4MB). Peak memory consumption was 13.9MB. Max. memory is 16.1GB. [2021-12-22 08:33:39,497 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 90.2MB. Free memory was 63.7MB in the beginning and 63.7MB in the end (delta: 26.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 08:33:39,498 INFO L158 Benchmark]: CACSL2BoogieTranslator took 194.19ms. Allocated memory was 90.2MB in the beginning and 113.2MB in the end (delta: 23.1MB). Free memory was 57.2MB in the beginning and 90.6MB in the end (delta: -33.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-22 08:33:39,499 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.23ms. Allocated memory is still 113.2MB. Free memory was 90.6MB in the beginning and 89.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 08:33:39,503 INFO L158 Benchmark]: Boogie Preprocessor took 16.24ms. Allocated memory is still 113.2MB. Free memory was 89.1MB in the beginning and 87.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 08:33:39,504 INFO L158 Benchmark]: RCFGBuilder took 206.69ms. Allocated memory is still 113.2MB. Free memory was 87.8MB in the beginning and 78.6MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-22 08:33:39,505 INFO L158 Benchmark]: TraceAbstraction took 297.82ms. Allocated memory is still 113.2MB. Free memory was 78.6MB in the beginning and 65.5MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-22 08:33:39,505 INFO L158 Benchmark]: Witness Printer took 4.59ms. Allocated memory is still 113.2MB. Free memory was 65.5MB in the beginning and 64.9MB in the end (delta: 572.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 08:33:39,512 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 90.2MB. Free memory was 63.7MB in the beginning and 63.7MB in the end (delta: 26.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 194.19ms. Allocated memory was 90.2MB in the beginning and 113.2MB in the end (delta: 23.1MB). Free memory was 57.2MB in the beginning and 90.6MB in the end (delta: -33.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.23ms. Allocated memory is still 113.2MB. Free memory was 90.6MB in the beginning and 89.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 16.24ms. Allocated memory is still 113.2MB. Free memory was 89.1MB in the beginning and 87.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 206.69ms. Allocated memory is still 113.2MB. Free memory was 87.8MB in the beginning and 78.6MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 297.82ms. Allocated memory is still 113.2MB. Free memory was 78.6MB in the beginning and 65.5MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 4.59ms. Allocated memory is still 113.2MB. Free memory was 65.5MB in the beginning and 64.9MB in the end (delta: 572.9kB). 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 [2021-12-22 08:33:41,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 08:33:41,958 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 08:33:41,960 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 08:33:41,961 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 08:33:41,962 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 08:33:41,963 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2021-12-22 08:33:42,020 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14e7d2f4d/b792b3542cd345bdacdab49f61cddac9/FLAGbb20f3f3c [2021-12-22 08:33:42,425 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 08:33:42,425 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2021-12-22 08:33:42,431 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14e7d2f4d/b792b3542cd345bdacdab49f61cddac9/FLAGbb20f3f3c [2021-12-22 08:33:42,837 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14e7d2f4d/b792b3542cd345bdacdab49f61cddac9 [2021-12-22 08:33:42,841 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 08:33:42,843 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 08:33:42,846 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 08:33:42,846 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 08:33:42,849 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 08:33:42,849 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:33:42" (1/1) ... [2021-12-22 08:33:42,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16fc1b2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:42, skipping insertion in model container [2021-12-22 08:33:42,852 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:33:42" (1/1) ... [2021-12-22 08:33:42,858 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 08:33:42,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 08:33:43,000 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] [2021-12-22 08:33:43,003 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:33:43,014 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 08:33:43,027 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] [2021-12-22 08:33:43,028 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:33:43,044 INFO L208 MainTranslator]: Completed translation [2021-12-22 08:33:43,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:43 WrapperNode [2021-12-22 08:33:43,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 08:33:43,046 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 08:33:43,046 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 08:33:43,046 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 08:33:43,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:43" (1/1) ... [2021-12-22 08:33:43,065 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:43" (1/1) ... [2021-12-22 08:33:43,091 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2021-12-22 08:33:43,091 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 08:33:43,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 08:33:43,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 08:33:43,093 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 08:33:43,099 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:43" (1/1) ... [2021-12-22 08:33:43,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:43" (1/1) ... [2021-12-22 08:33:43,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:43" (1/1) ... [2021-12-22 08:33:43,104 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:43" (1/1) ... [2021-12-22 08:33:43,109 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:43" (1/1) ... [2021-12-22 08:33:43,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:43" (1/1) ... [2021-12-22 08:33:43,114 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:43" (1/1) ... [2021-12-22 08:33:43,115 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 08:33:43,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 08:33:43,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 08:33:43,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 08:33:43,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:43" (1/1) ... [2021-12-22 08:33:43,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:33:43,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:33:43,180 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 08:33:43,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 08:33:43,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 08:33:43,216 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2021-12-22 08:33:43,216 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2021-12-22 08:33:43,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 08:33:43,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 08:33:43,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-22 08:33:43,278 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 08:33:43,280 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 08:33:43,409 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 08:33:43,418 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 08:33:43,419 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 08:33:43,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:33:43 BoogieIcfgContainer [2021-12-22 08:33:43,421 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 08:33:43,423 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 08:33:43,423 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 08:33:43,426 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 08:33:43,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:33:42" (1/3) ... [2021-12-22 08:33:43,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5282e3f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:33:43, skipping insertion in model container [2021-12-22 08:33:43,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:43" (2/3) ... [2021-12-22 08:33:43,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5282e3f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:33:43, skipping insertion in model container [2021-12-22 08:33:43,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:33:43" (3/3) ... [2021-12-22 08:33:43,429 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi03-1.c [2021-12-22 08:33:43,434 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 08:33:43,434 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 08:33:43,484 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 08:33:43,495 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 08:33:43,496 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 08:33:43,517 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) [2021-12-22 08:33:43,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-22 08:33:43,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:43,522 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:33:43,523 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:43,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:43,528 INFO L85 PathProgramCache]: Analyzing trace with hash -2087939196, now seen corresponding path program 1 times [2021-12-22 08:33:43,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 08:33:43,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1415597613] [2021-12-22 08:33:43,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:43,540 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 08:33:43,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 08:33:43,543 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) [2021-12-22 08:33:43,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-22 08:33:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:43,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 08:33:43,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:33:43,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:33:43,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 08:33:43,873 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 08:33:43,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1415597613] [2021-12-22 08:33:43,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1415597613] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:33:43,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:33:43,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 08:33:43,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742163877] [2021-12-22 08:33:43,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:33:43,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 08:33:43,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 08:33:43,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 08:33:43,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 08:33:43,908 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) [2021-12-22 08:33:44,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:44,005 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-12-22 08:33:44,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 08:33:44,008 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 [2021-12-22 08:33:44,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:44,014 INFO L225 Difference]: With dead ends: 32 [2021-12-22 08:33:44,014 INFO L226 Difference]: Without dead ends: 16 [2021-12-22 08:33:44,017 INFO L932 BasicCegarLoop]: 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 [2021-12-22 08:33:44,021 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:33:44,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 53 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:33:44,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-22 08:33:44,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-12-22 08:33:44,055 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) [2021-12-22 08:33:44,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-12-22 08:33:44,057 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2021-12-22 08:33:44,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:44,058 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-12-22 08:33:44,058 INFO L471 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) [2021-12-22 08:33:44,060 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-12-22 08:33:44,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 08:33:44,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:44,062 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:33:44,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-22 08:33:44,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 08:33:44,272 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:44,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:44,273 INFO L85 PathProgramCache]: Analyzing trace with hash -2053638732, now seen corresponding path program 1 times [2021-12-22 08:33:44,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 08:33:44,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1422311864] [2021-12-22 08:33:44,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:44,274 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 08:33:44,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 08:33:44,275 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) [2021-12-22 08:33:44,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-22 08:33:44,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:44,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 08:33:44,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:33:44,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 08:33:44,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:33:45,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 08:33:45,108 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 08:33:45,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1422311864] [2021-12-22 08:33:45,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1422311864] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:33:45,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 08:33:45,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-12-22 08:33:45,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352644198] [2021-12-22 08:33:45,109 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 08:33:45,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-22 08:33:45,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 08:33:45,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-22 08:33:45,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-12-22 08:33:45,112 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) [2021-12-22 08:33:45,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:45,420 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-12-22 08:33:45,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 08:33:45,421 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 [2021-12-22 08:33:45,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:45,422 INFO L225 Difference]: With dead ends: 28 [2021-12-22 08:33:45,422 INFO L226 Difference]: Without dead ends: 22 [2021-12-22 08:33:45,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-12-22 08:33:45,424 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:33:45,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 66 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 106 Invalid, 0 Unknown, 6 Unchecked, 0.1s Time] [2021-12-22 08:33:45,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-22 08:33:45,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-22 08:33:45,429 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) [2021-12-22 08:33:45,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-12-22 08:33:45,440 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2021-12-22 08:33:45,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:45,440 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-12-22 08:33:45,441 INFO L471 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) [2021-12-22 08:33:45,441 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-12-22 08:33:45,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-22 08:33:45,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:45,442 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:33:45,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-22 08:33:45,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 08:33:45,651 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:45,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:45,651 INFO L85 PathProgramCache]: Analyzing trace with hash -491101836, now seen corresponding path program 2 times [2021-12-22 08:33:45,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 08:33:45,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1425808089] [2021-12-22 08:33:45,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 08:33:45,654 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 08:33:45,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 08:33:45,655 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) [2021-12-22 08:33:45,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-22 08:33:45,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 08:33:45,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:33:45,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-22 08:33:45,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:33:45,973 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-22 08:33:45,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:33:47,535 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 08:33:47,536 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 08:33:47,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1425808089] [2021-12-22 08:33:47,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1425808089] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:33:47,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 08:33:47,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-12-22 08:33:47,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320794892] [2021-12-22 08:33:47,537 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 08:33:47,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-22 08:33:47,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 08:33:47,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-22 08:33:47,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-12-22 08:33:47,539 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) [2021-12-22 08:33:48,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:48,159 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-12-22 08:33:48,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 08:33:48,160 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 [2021-12-22 08:33:48,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:48,160 INFO L225 Difference]: With dead ends: 34 [2021-12-22 08:33:48,161 INFO L226 Difference]: Without dead ends: 28 [2021-12-22 08:33:48,161 INFO L932 BasicCegarLoop]: 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 [2021-12-22 08:33:48,162 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 08:33:48,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 127 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 168 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2021-12-22 08:33:48,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-22 08:33:48,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-22 08:33:48,169 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) [2021-12-22 08:33:48,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-12-22 08:33:48,171 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 29 [2021-12-22 08:33:48,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:48,172 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-12-22 08:33:48,172 INFO L471 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) [2021-12-22 08:33:48,172 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-12-22 08:33:48,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-22 08:33:48,173 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:48,174 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:33:48,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-22 08:33:48,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 08:33:48,385 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:48,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:48,385 INFO L85 PathProgramCache]: Analyzing trace with hash -492655308, now seen corresponding path program 3 times [2021-12-22 08:33:48,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 08:33:48,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [986291158] [2021-12-22 08:33:48,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 08:33:48,386 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 08:33:48,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 08:33:48,387 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) [2021-12-22 08:33:48,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-22 08:33:48,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-22 08:33:48,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:33:48,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-22 08:33:48,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:33:48,755 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-22 08:33:48,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:33:51,383 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-22 08:33:51,383 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 08:33:51,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [986291158] [2021-12-22 08:33:51,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [986291158] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:33:51,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 08:33:51,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 36 [2021-12-22 08:33:51,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158675240] [2021-12-22 08:33:51,385 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 08:33:51,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-22 08:33:51,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 08:33:51,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-22 08:33:51,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2021-12-22 08:33:51,387 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) [2021-12-22 08:33:52,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:52,032 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-12-22 08:33:52,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-22 08:33:52,033 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 [2021-12-22 08:33:52,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:52,034 INFO L225 Difference]: With dead ends: 40 [2021-12-22 08:33:52,034 INFO L226 Difference]: Without dead ends: 34 [2021-12-22 08:33:52,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=290, Invalid=2260, Unknown=0, NotChecked=0, Total=2550 [2021-12-22 08:33:52,036 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 08:33:52,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 189 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 190 Invalid, 0 Unknown, 155 Unchecked, 0.2s Time] [2021-12-22 08:33:52,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-22 08:33:52,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-12-22 08:33:52,042 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) [2021-12-22 08:33:52,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-12-22 08:33:52,042 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 41 [2021-12-22 08:33:52,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:52,043 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-12-22 08:33:52,043 INFO L471 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) [2021-12-22 08:33:52,043 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-12-22 08:33:52,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-22 08:33:52,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:52,044 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:33:52,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-22 08:33:52,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 08:33:52,251 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:52,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:52,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1906255628, now seen corresponding path program 4 times [2021-12-22 08:33:52,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 08:33:52,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2137031400] [2021-12-22 08:33:52,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 08:33:52,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 08:33:52,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 08:33:52,254 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) [2021-12-22 08:33:52,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-22 08:33:52,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 08:33:52,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:33:52,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-22 08:33:52,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:33:52,749 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-22 08:33:52,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:33:56,754 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-22 08:33:56,754 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 08:33:56,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2137031400] [2021-12-22 08:33:56,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2137031400] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:33:56,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 08:33:56,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27] total 46 [2021-12-22 08:33:56,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18887246] [2021-12-22 08:33:56,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 08:33:56,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-22 08:33:56,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 08:33:56,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-22 08:33:56,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1913, Unknown=0, NotChecked=0, Total=2070 [2021-12-22 08:33:56,758 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) [2021-12-22 08:33:57,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:57,667 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2021-12-22 08:33:57,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-22 08:33:57,668 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 [2021-12-22 08:33:57,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:57,669 INFO L225 Difference]: With dead ends: 46 [2021-12-22 08:33:57,669 INFO L226 Difference]: Without dead ends: 40 [2021-12-22 08:33:57,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=414, Invalid=3746, Unknown=0, NotChecked=0, Total=4160 [2021-12-22 08:33:57,676 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 28 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 289 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 08:33:57,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 302 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 335 Invalid, 0 Unknown, 289 Unchecked, 0.2s Time] [2021-12-22 08:33:57,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-22 08:33:57,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-12-22 08:33:57,692 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) [2021-12-22 08:33:57,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-12-22 08:33:57,696 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 53 [2021-12-22 08:33:57,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:57,698 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-12-22 08:33:57,698 INFO L471 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) [2021-12-22 08:33:57,698 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-12-22 08:33:57,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 08:33:57,703 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:57,704 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:33:57,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-22 08:33:57,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 08:33:57,916 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:57,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:57,916 INFO L85 PathProgramCache]: Analyzing trace with hash 788849844, now seen corresponding path program 5 times [2021-12-22 08:33:57,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 08:33:57,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1402452979] [2021-12-22 08:33:57,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 08:33:57,917 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 08:33:57,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 08:33:57,918 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) [2021-12-22 08:33:57,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-22 08:33:57,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-22 08:33:57,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:33:57,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-22 08:33:57,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:33:58,486 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-22 08:33:58,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:34:03,470 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-22 08:34:03,471 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 08:34:03,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1402452979] [2021-12-22 08:34:03,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1402452979] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:34:03,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 08:34:03,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 33] total 56 [2021-12-22 08:34:03,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432650316] [2021-12-22 08:34:03,471 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 08:34:03,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-22 08:34:03,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 08:34:03,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-22 08:34:03,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2885, Unknown=0, NotChecked=0, Total=3080 [2021-12-22 08:34:03,474 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) [2021-12-22 08:34:04,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:04,586 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-12-22 08:34:04,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-22 08:34:04,587 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 [2021-12-22 08:34:04,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:04,588 INFO L225 Difference]: With dead ends: 52 [2021-12-22 08:34:04,588 INFO L226 Difference]: Without dead ends: 46 [2021-12-22 08:34:04,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=554, Invalid=5608, Unknown=0, NotChecked=0, Total=6162 [2021-12-22 08:34:04,590 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 74 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 456 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 08:34:04,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 367 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 367 Invalid, 0 Unknown, 456 Unchecked, 0.3s Time] [2021-12-22 08:34:04,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-22 08:34:04,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-12-22 08:34:04,595 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) [2021-12-22 08:34:04,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-12-22 08:34:04,596 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 65 [2021-12-22 08:34:04,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:04,596 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-12-22 08:34:04,596 INFO L471 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) [2021-12-22 08:34:04,596 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-12-22 08:34:04,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-22 08:34:04,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:04,597 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:34:04,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-22 08:34:04,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 08:34:04,798 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:04,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:04,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1302253684, now seen corresponding path program 6 times [2021-12-22 08:34:04,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 08:34:04,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1443840083] [2021-12-22 08:34:04,799 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-22 08:34:04,799 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 08:34:04,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 08:34:04,801 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) [2021-12-22 08:34:04,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-22 08:34:04,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-22 08:34:04,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:34:04,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-22 08:34:04,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:34:05,517 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-12-22 08:34:05,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:34:12,562 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-22 08:34:12,562 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 08:34:12,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1443840083] [2021-12-22 08:34:12,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1443840083] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:34:12,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 08:34:12,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 39] total 66 [2021-12-22 08:34:12,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838112642] [2021-12-22 08:34:12,563 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 08:34:12,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-22 08:34:12,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 08:34:12,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-22 08:34:12,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=4057, Unknown=0, NotChecked=0, Total=4290 [2021-12-22 08:34:12,565 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) [2021-12-22 08:34:14,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:14,172 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-12-22 08:34:14,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-22 08:34:14,173 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 [2021-12-22 08:34:14,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:14,174 INFO L225 Difference]: With dead ends: 58 [2021-12-22 08:34:14,174 INFO L226 Difference]: Without dead ends: 52 [2021-12-22 08:34:14,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=710, Invalid=7846, Unknown=0, NotChecked=0, Total=8556 [2021-12-22 08:34:14,177 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 19 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 1300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 650 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 08:34:14,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 652 Invalid, 1300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 624 Invalid, 0 Unknown, 650 Unchecked, 0.4s Time] [2021-12-22 08:34:14,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-22 08:34:14,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-22 08:34:14,181 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) [2021-12-22 08:34:14,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-12-22 08:34:14,181 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 77 [2021-12-22 08:34:14,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:14,182 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-12-22 08:34:14,182 INFO L471 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) [2021-12-22 08:34:14,185 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-12-22 08:34:14,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-22 08:34:14,188 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:14,188 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:34:14,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-22 08:34:14,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 08:34:14,388 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:14,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:14,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1287742412, now seen corresponding path program 7 times [2021-12-22 08:34:14,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 08:34:14,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146908515] [2021-12-22 08:34:14,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-22 08:34:14,390 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 08:34:14,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 08:34:14,391 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) [2021-12-22 08:34:14,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-22 08:34:14,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:14,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-22 08:34:14,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:34:15,178 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-12-22 08:34:15,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:34:24,298 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-22 08:34:24,298 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 08:34:24,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146908515] [2021-12-22 08:34:24,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146908515] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:34:24,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 08:34:24,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 45] total 76 [2021-12-22 08:34:24,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798132006] [2021-12-22 08:34:24,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 08:34:24,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-12-22 08:34:24,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 08:34:24,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-12-22 08:34:24,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=5429, Unknown=0, NotChecked=0, Total=5700 [2021-12-22 08:34:24,302 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) [2021-12-22 08:34:26,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:26,188 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2021-12-22 08:34:26,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-22 08:34:26,189 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 [2021-12-22 08:34:26,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:26,190 INFO L225 Difference]: With dead ends: 64 [2021-12-22 08:34:26,190 INFO L226 Difference]: Without dead ends: 58 [2021-12-22 08:34:26,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=882, Invalid=10460, Unknown=0, NotChecked=0, Total=11342 [2021-12-22 08:34:26,193 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 127 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 792 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 08:34:26,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 777 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 707 Invalid, 0 Unknown, 792 Unchecked, 0.4s Time] [2021-12-22 08:34:26,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-22 08:34:26,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-12-22 08:34:26,198 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) [2021-12-22 08:34:26,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-12-22 08:34:26,199 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 89 [2021-12-22 08:34:26,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:26,204 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-12-22 08:34:26,204 INFO L471 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) [2021-12-22 08:34:26,204 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-12-22 08:34:26,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-22 08:34:26,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:26,207 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:34:26,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-22 08:34:26,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 08:34:26,416 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:26,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:26,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1760839668, now seen corresponding path program 8 times [2021-12-22 08:34:26,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 08:34:26,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1167973207] [2021-12-22 08:34:26,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 08:34:26,417 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 08:34:26,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 08:34:26,418 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) [2021-12-22 08:34:26,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-22 08:34:26,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 08:34:26,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:34:26,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-22 08:34:26,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:34:27,338 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-12-22 08:34:27,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:34:38,647 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-22 08:34:38,648 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 08:34:38,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1167973207] [2021-12-22 08:34:38,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1167973207] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:34:38,648 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 08:34:38,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 51] total 86 [2021-12-22 08:34:38,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028668186] [2021-12-22 08:34:38,648 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 08:34:38,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-22 08:34:38,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 08:34:38,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-22 08:34:38,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=7001, Unknown=0, NotChecked=0, Total=7310 [2021-12-22 08:34:38,651 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) [2021-12-22 08:34:40,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:40,970 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2021-12-22 08:34:40,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-22 08:34:40,971 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 [2021-12-22 08:34:40,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:40,974 INFO L225 Difference]: With dead ends: 70 [2021-12-22 08:34:40,974 INFO L226 Difference]: Without dead ends: 64 [2021-12-22 08:34:40,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1906 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=1070, Invalid=13450, Unknown=0, NotChecked=0, Total=14520 [2021-12-22 08:34:40,977 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 123 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 2169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1169 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 08:34:40,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 889 Invalid, 2169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 796 Invalid, 0 Unknown, 1169 Unchecked, 0.5s Time] [2021-12-22 08:34:40,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-22 08:34:40,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-12-22 08:34:40,989 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) [2021-12-22 08:34:40,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2021-12-22 08:34:40,990 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 101 [2021-12-22 08:34:40,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:40,990 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2021-12-22 08:34:40,991 INFO L471 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) [2021-12-22 08:34:40,991 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2021-12-22 08:34:40,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-22 08:34:40,992 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:40,992 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:34:41,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0