./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/gcd_4+newton_3_6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/gcd_4+newton_3_6.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d2ff4855d3411c2183b4955db69fb0d32886e02ca6014c3e616f77788a55bdc3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 20:13:14,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 20:13:14,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 20:13:14,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 20:13:14,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 20:13:14,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 20:13:14,110 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 20:13:14,112 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 20:13:14,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 20:13:14,114 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 20:13:14,115 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 20:13:14,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 20:13:14,116 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 20:13:14,117 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 20:13:14,118 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 20:13:14,119 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 20:13:14,120 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 20:13:14,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 20:13:14,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 20:13:14,124 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 20:13:14,125 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 20:13:14,126 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 20:13:14,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 20:13:14,128 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 20:13:14,129 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 20:13:14,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 20:13:14,132 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 20:13:14,132 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 20:13:14,133 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 20:13:14,134 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 20:13:14,134 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 20:13:14,135 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 20:13:14,135 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 20:13:14,136 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 20:13:14,137 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 20:13:14,138 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 20:13:14,138 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 20:13:14,138 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 20:13:14,139 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 20:13:14,139 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 20:13:14,140 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 20:13:14,141 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 20:13:14,141 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 20:13:14,161 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 20:13:14,161 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 20:13:14,162 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 20:13:14,162 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 20:13:14,163 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 20:13:14,163 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 20:13:14,164 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 20:13:14,164 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 20:13:14,164 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 20:13:14,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 20:13:14,165 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 20:13:14,165 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 20:13:14,165 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 20:13:14,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 20:13:14,166 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 20:13:14,166 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 20:13:14,166 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 20:13:14,166 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 20:13:14,167 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 20:13:14,167 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 20:13:14,167 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 20:13:14,167 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 20:13:14,168 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 20:13:14,168 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 20:13:14,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 20:13:14,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 20:13:14,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 20:13:14,169 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 20:13:14,169 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 20:13:14,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 20:13:14,170 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 20:13:14,170 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 20:13:14,170 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 20:13:14,170 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2ff4855d3411c2183b4955db69fb0d32886e02ca6014c3e616f77788a55bdc3 [2022-07-22 20:13:14,370 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 20:13:14,395 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 20:13:14,398 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 20:13:14,399 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 20:13:14,400 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 20:13:14,401 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_4+newton_3_6.i [2022-07-22 20:13:14,481 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25d49f9bf/4c6480ff08d84499887cb913d51d61c4/FLAG1eb8673ac [2022-07-22 20:13:14,827 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 20:13:14,828 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_3_6.i [2022-07-22 20:13:14,835 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25d49f9bf/4c6480ff08d84499887cb913d51d61c4/FLAG1eb8673ac [2022-07-22 20:13:15,251 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25d49f9bf/4c6480ff08d84499887cb913d51d61c4 [2022-07-22 20:13:15,253 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 20:13:15,254 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 20:13:15,256 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 20:13:15,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 20:13:15,259 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 20:13:15,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 08:13:15" (1/1) ... [2022-07-22 20:13:15,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61fee468 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:13:15, skipping insertion in model container [2022-07-22 20:13:15,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 08:13:15" (1/1) ... [2022-07-22 20:13:15,268 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 20:13:15,290 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 20:13:15,446 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_3_6.i[1224,1237] [2022-07-22 20:13:15,496 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/combinations/gcd_4+newton_3_6.i[2848,2861] [2022-07-22 20:13:15,500 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 20:13:15,508 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 20:13:15,526 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/combinations/gcd_4+newton_3_6.i[1224,1237] [2022-07-22 20:13:15,546 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/combinations/gcd_4+newton_3_6.i[2848,2861] [2022-07-22 20:13:15,548 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 20:13:15,562 INFO L208 MainTranslator]: Completed translation [2022-07-22 20:13:15,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:13:15 WrapperNode [2022-07-22 20:13:15,563 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 20:13:15,564 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 20:13:15,564 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 20:13:15,565 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 20:13:15,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:13:15" (1/1) ... [2022-07-22 20:13:15,587 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:13:15" (1/1) ... [2022-07-22 20:13:15,609 INFO L137 Inliner]: procedures = 27, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 77 [2022-07-22 20:13:15,609 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 20:13:15,610 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 20:13:15,610 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 20:13:15,610 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 20:13:15,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:13:15" (1/1) ... [2022-07-22 20:13:15,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:13:15" (1/1) ... [2022-07-22 20:13:15,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:13:15" (1/1) ... [2022-07-22 20:13:15,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:13:15" (1/1) ... [2022-07-22 20:13:15,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:13:15" (1/1) ... [2022-07-22 20:13:15,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:13:15" (1/1) ... [2022-07-22 20:13:15,642 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:13:15" (1/1) ... [2022-07-22 20:13:15,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 20:13:15,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 20:13:15,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 20:13:15,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 20:13:15,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:13:15" (1/1) ... [2022-07-22 20:13:15,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 20:13:15,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:13:15,671 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 20:13:15,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 20:13:15,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 20:13:15,700 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-07-22 20:13:15,700 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-07-22 20:13:15,700 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-07-22 20:13:15,700 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-07-22 20:13:15,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 20:13:15,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 20:13:15,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 20:13:15,701 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 20:13:15,703 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 20:13:15,756 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 20:13:15,757 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 20:13:15,897 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 20:13:15,903 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 20:13:15,903 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 20:13:15,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 08:13:15 BoogieIcfgContainer [2022-07-22 20:13:15,905 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 20:13:15,907 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 20:13:15,907 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 20:13:15,922 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 20:13:15,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 08:13:15" (1/3) ... [2022-07-22 20:13:15,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@616bf5fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 08:13:15, skipping insertion in model container [2022-07-22 20:13:15,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:13:15" (2/3) ... [2022-07-22 20:13:15,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@616bf5fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 08:13:15, skipping insertion in model container [2022-07-22 20:13:15,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 08:13:15" (3/3) ... [2022-07-22 20:13:15,925 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_3_6.i [2022-07-22 20:13:15,943 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 20:13:15,944 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-22 20:13:16,007 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 20:13:16,022 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@45e05de3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7a88c11b [2022-07-22 20:13:16,022 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 20:13:16,036 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-22 20:13:16,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-22 20:13:16,051 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:13:16,053 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:13:16,054 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:13:16,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:13:16,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1780387208, now seen corresponding path program 1 times [2022-07-22 20:13:16,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:13:16,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149468100] [2022-07-22 20:13:16,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:13:16,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:13:16,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:13:16,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:13:16,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:13:16,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149468100] [2022-07-22 20:13:16,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149468100] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:13:16,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:13:16,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 20:13:16,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791455421] [2022-07-22 20:13:16,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:13:16,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:13:16,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:13:16,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:13:16,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:13:16,336 INFO L87 Difference]: Start difference. First operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:13:16,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:13:16,407 INFO L93 Difference]: Finished difference Result 99 states and 137 transitions. [2022-07-22 20:13:16,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:13:16,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-22 20:13:16,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:13:16,424 INFO L225 Difference]: With dead ends: 99 [2022-07-22 20:13:16,425 INFO L226 Difference]: Without dead ends: 46 [2022-07-22 20:13:16,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:13:16,435 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 13 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:13:16,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 99 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:13:16,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-22 20:13:16,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2022-07-22 20:13:16,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 20:13:16,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2022-07-22 20:13:16,484 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 11 [2022-07-22 20:13:16,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:13:16,485 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2022-07-22 20:13:16,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:13:16,485 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2022-07-22 20:13:16,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-22 20:13:16,487 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:13:16,487 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:13:16,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 20:13:16,488 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:13:16,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:13:16,490 INFO L85 PathProgramCache]: Analyzing trace with hash 413718792, now seen corresponding path program 1 times [2022-07-22 20:13:16,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:13:16,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060740583] [2022-07-22 20:13:16,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:13:16,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:13:16,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:13:16,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:13:16,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:13:16,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060740583] [2022-07-22 20:13:16,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060740583] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:13:16,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:13:16,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 20:13:16,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198090085] [2022-07-22 20:13:16,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:13:16,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:13:16,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:13:16,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:13:16,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:13:16,560 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:13:16,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:13:16,586 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2022-07-22 20:13:16,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:13:16,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-22 20:13:16,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:13:16,589 INFO L225 Difference]: With dead ends: 55 [2022-07-22 20:13:16,589 INFO L226 Difference]: Without dead ends: 41 [2022-07-22 20:13:16,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:13:16,592 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 4 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:13:16,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 80 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:13:16,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-22 20:13:16,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-07-22 20:13:16,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 20:13:16,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-07-22 20:13:16,601 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 13 [2022-07-22 20:13:16,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:13:16,601 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-07-22 20:13:16,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:13:16,602 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-07-22 20:13:16,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-22 20:13:16,603 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:13:16,603 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:13:16,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 20:13:16,604 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:13:16,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:13:16,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1714945339, now seen corresponding path program 1 times [2022-07-22 20:13:16,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:13:16,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590949913] [2022-07-22 20:13:16,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:13:16,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:13:16,620 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 20:13:16,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2136666095] [2022-07-22 20:13:16,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:13:16,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:13:16,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:13:16,631 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 20:13:16,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 20:13:16,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:13:16,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 20:13:16,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:13:16,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:13:16,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:13:16,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:13:16,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:13:16,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590949913] [2022-07-22 20:13:16,824 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 20:13:16,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136666095] [2022-07-22 20:13:16,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136666095] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:13:16,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 20:13:16,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-07-22 20:13:16,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606852052] [2022-07-22 20:13:16,830 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 20:13:16,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:13:16,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:13:16,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:13:16,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:13:16,833 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:13:16,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:13:16,896 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2022-07-22 20:13:16,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 20:13:16,897 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-22 20:13:16,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:13:16,898 INFO L225 Difference]: With dead ends: 58 [2022-07-22 20:13:16,899 INFO L226 Difference]: Without dead ends: 45 [2022-07-22 20:13:16,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:13:16,900 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:13:16,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 154 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:13:16,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-22 20:13:16,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-07-22 20:13:16,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 33 states have internal predecessors, (36), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 20:13:16,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2022-07-22 20:13:16,913 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 15 [2022-07-22 20:13:16,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:13:16,914 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2022-07-22 20:13:16,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:13:16,914 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2022-07-22 20:13:16,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-22 20:13:16,915 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:13:16,916 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:13:16,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 20:13:17,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:13:17,141 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:13:17,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:13:17,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1992824063, now seen corresponding path program 1 times [2022-07-22 20:13:17,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:13:17,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507632037] [2022-07-22 20:13:17,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:13:17,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:13:17,154 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 20:13:17,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980632711] [2022-07-22 20:13:17,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:13:17,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:13:17,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:13:17,159 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 20:13:17,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 20:13:17,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:13:17,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 20:13:17,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:13:17,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:13:17,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:13:17,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:13:17,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:13:17,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507632037] [2022-07-22 20:13:17,354 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 20:13:17,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980632711] [2022-07-22 20:13:17,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980632711] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:13:17,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 20:13:17,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-22 20:13:17,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341068452] [2022-07-22 20:13:17,355 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 20:13:17,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 20:13:17,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:13:17,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 20:13:17,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-22 20:13:17,357 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:13:17,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:13:17,426 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2022-07-22 20:13:17,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 20:13:17,427 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-22 20:13:17,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:13:17,430 INFO L225 Difference]: With dead ends: 60 [2022-07-22 20:13:17,430 INFO L226 Difference]: Without dead ends: 47 [2022-07-22 20:13:17,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-22 20:13:17,431 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:13:17,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 227 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:13:17,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-22 20:13:17,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-07-22 20:13:17,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 20:13:17,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-07-22 20:13:17,443 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 19 [2022-07-22 20:13:17,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:13:17,443 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-07-22 20:13:17,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:13:17,444 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-07-22 20:13:17,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-22 20:13:17,445 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:13:17,445 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:13:17,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 20:13:17,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-22 20:13:17,648 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:13:17,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:13:17,648 INFO L85 PathProgramCache]: Analyzing trace with hash -626272964, now seen corresponding path program 2 times [2022-07-22 20:13:17,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:13:17,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948253891] [2022-07-22 20:13:17,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:13:17,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:13:17,659 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 20:13:17,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1291289996] [2022-07-22 20:13:17,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 20:13:17,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:13:17,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:13:17,665 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 20:13:17,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 20:13:17,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 20:13:17,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 20:13:17,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 20:13:17,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:13:17,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:13:17,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:13:17,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:13:17,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:13:17,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948253891] [2022-07-22 20:13:17,868 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 20:13:17,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291289996] [2022-07-22 20:13:17,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291289996] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:13:17,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 20:13:17,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-07-22 20:13:17,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601425806] [2022-07-22 20:13:17,869 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 20:13:17,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 20:13:17,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:13:17,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 20:13:17,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-07-22 20:13:17,871 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:13:17,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:13:17,970 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2022-07-22 20:13:17,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 20:13:17,971 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-22 20:13:17,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:13:17,972 INFO L225 Difference]: With dead ends: 68 [2022-07-22 20:13:17,972 INFO L226 Difference]: Without dead ends: 53 [2022-07-22 20:13:17,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-07-22 20:13:17,974 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:13:17,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 301 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 20:13:17,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-22 20:13:17,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-07-22 20:13:17,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 20:13:17,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2022-07-22 20:13:17,982 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 21 [2022-07-22 20:13:17,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:13:17,982 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2022-07-22 20:13:17,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:13:17,982 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2022-07-22 20:13:17,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-22 20:13:17,983 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:13:17,983 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:13:18,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 20:13:18,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:13:18,196 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:13:18,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:13:18,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1120707465, now seen corresponding path program 3 times [2022-07-22 20:13:18,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:13:18,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734837430] [2022-07-22 20:13:18,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:13:18,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:13:18,207 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 20:13:18,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1666541139] [2022-07-22 20:13:18,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 20:13:18,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:13:18,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:13:18,209 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 20:13:18,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 20:13:18,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-22 20:13:18,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 20:13:18,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-22 20:13:18,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:13:18,406 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 20:13:18,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:13:18,816 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 20:13:18,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:13:18,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734837430] [2022-07-22 20:13:18,816 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 20:13:18,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666541139] [2022-07-22 20:13:18,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666541139] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:13:18,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 20:13:18,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-07-22 20:13:18,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842509870] [2022-07-22 20:13:18,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 20:13:18,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 20:13:18,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:13:18,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 20:13:18,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-07-22 20:13:18,818 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 18 states, 16 states have (on average 2.0625) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:13:19,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:13:19,968 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2022-07-22 20:13:19,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-22 20:13:19,971 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-22 20:13:19,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:13:19,972 INFO L225 Difference]: With dead ends: 81 [2022-07-22 20:13:19,972 INFO L226 Difference]: Without dead ends: 78 [2022-07-22 20:13:19,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2022-07-22 20:13:19,974 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 50 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 20:13:19,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 338 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 20:13:19,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-22 20:13:19,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 70. [2022-07-22 20:13:19,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 56 states have internal predecessors, (64), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-22 20:13:19,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2022-07-22 20:13:19,983 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 23 [2022-07-22 20:13:19,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:13:19,983 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2022-07-22 20:13:19,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:13:19,984 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2022-07-22 20:13:19,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-22 20:13:19,985 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:13:19,985 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:13:20,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 20:13:20,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:13:20,200 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:13:20,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:13:20,200 INFO L85 PathProgramCache]: Analyzing trace with hash 469106930, now seen corresponding path program 4 times [2022-07-22 20:13:20,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:13:20,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640040599] [2022-07-22 20:13:20,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:13:20,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:13:20,210 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 20:13:20,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [414818767] [2022-07-22 20:13:20,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 20:13:20,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:13:20,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:13:20,213 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 20:13:20,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 20:13:20,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 20:13:20,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 20:13:20,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-22 20:13:20,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:13:20,374 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:13:20,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:13:20,497 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:13:20,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:13:20,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640040599] [2022-07-22 20:13:20,498 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 20:13:20,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414818767] [2022-07-22 20:13:20,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414818767] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:13:20,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 20:13:20,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-07-22 20:13:20,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813471504] [2022-07-22 20:13:20,499 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 20:13:20,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 20:13:20,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:13:20,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 20:13:20,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-07-22 20:13:20,501 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:13:20,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:13:20,667 INFO L93 Difference]: Finished difference Result 94 states and 117 transitions. [2022-07-22 20:13:20,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 20:13:20,669 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-22 20:13:20,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:13:20,671 INFO L225 Difference]: With dead ends: 94 [2022-07-22 20:13:20,671 INFO L226 Difference]: Without dead ends: 66 [2022-07-22 20:13:20,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2022-07-22 20:13:20,672 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 25 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:13:20,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 411 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 20:13:20,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-22 20:13:20,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-07-22 20:13:20,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 52 states have internal predecessors, (55), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-22 20:13:20,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2022-07-22 20:13:20,689 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 25 [2022-07-22 20:13:20,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:13:20,690 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2022-07-22 20:13:20,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:13:20,691 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2022-07-22 20:13:20,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-22 20:13:20,696 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:13:20,697 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:13:20,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 20:13:20,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:13:20,912 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:13:20,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:13:20,912 INFO L85 PathProgramCache]: Analyzing trace with hash -985782289, now seen corresponding path program 5 times [2022-07-22 20:13:20,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:13:20,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248349730] [2022-07-22 20:13:20,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:13:20,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:13:20,934 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 20:13:20,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2088568234] [2022-07-22 20:13:20,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 20:13:20,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:13:20,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:13:20,936 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 20:13:20,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 20:13:20,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-22 20:13:20,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 20:13:20,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 20:13:20,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:13:21,171 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:13:21,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:13:21,512 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:13:21,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:13:21,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248349730] [2022-07-22 20:13:21,512 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 20:13:21,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088568234] [2022-07-22 20:13:21,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088568234] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:13:21,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 20:13:21,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-07-22 20:13:21,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771863232] [2022-07-22 20:13:21,513 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 20:13:21,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 20:13:21,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:13:21,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 20:13:21,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-07-22 20:13:21,521 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:13:21,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:13:21,612 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2022-07-22 20:13:21,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 20:13:21,613 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-22 20:13:21,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:13:21,613 INFO L225 Difference]: With dead ends: 76 [2022-07-22 20:13:21,613 INFO L226 Difference]: Without dead ends: 49 [2022-07-22 20:13:21,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-07-22 20:13:21,615 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:13:21,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 354 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 91 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2022-07-22 20:13:21,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-22 20:13:21,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-07-22 20:13:21,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 20:13:21,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-07-22 20:13:21,622 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 27 [2022-07-22 20:13:21,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:13:21,622 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-07-22 20:13:21,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:13:21,622 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-07-22 20:13:21,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 20:13:21,623 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:13:21,623 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:13:21,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 20:13:21,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:13:21,841 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:13:21,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:13:21,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1781630816, now seen corresponding path program 1 times [2022-07-22 20:13:21,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:13:21,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174614396] [2022-07-22 20:13:21,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:13:21,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:13:21,854 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 20:13:21,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476498214] [2022-07-22 20:13:21,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:13:21,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:13:21,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:13:21,859 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 20:13:21,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 20:13:21,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:13:21,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-22 20:13:21,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:13:22,024 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 20:13:22,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:13:22,619 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 20:13:22,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:13:22,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174614396] [2022-07-22 20:13:22,619 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 20:13:22,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476498214] [2022-07-22 20:13:22,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476498214] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:13:22,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 20:13:22,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-07-22 20:13:22,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303619233] [2022-07-22 20:13:22,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 20:13:22,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 20:13:22,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:13:22,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 20:13:22,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-07-22 20:13:22,624 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 20:13:23,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:13:23,393 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2022-07-22 20:13:23,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 20:13:23,394 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-07-22 20:13:23,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:13:23,394 INFO L225 Difference]: With dead ends: 49 [2022-07-22 20:13:23,394 INFO L226 Difference]: Without dead ends: 23 [2022-07-22 20:13:23,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-07-22 20:13:23,396 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 10 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 20:13:23,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 388 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 20:13:23,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-22 20:13:23,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-07-22 20:13:23,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.0) internal successors, (14), 14 states have internal predecessors, (14), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 20:13:23,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-07-22 20:13:23,399 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 28 [2022-07-22 20:13:23,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:13:23,399 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-07-22 20:13:23,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 20:13:23,400 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-07-22 20:13:23,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-22 20:13:23,401 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:13:23,401 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:13:23,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-22 20:13:23,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:13:23,612 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:13:23,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:13:23,612 INFO L85 PathProgramCache]: Analyzing trace with hash -21288017, now seen corresponding path program 1 times [2022-07-22 20:13:23,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:13:23,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706082325] [2022-07-22 20:13:23,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:13:23,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:13:23,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 20:13:23,645 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 20:13:23,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 20:13:23,677 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 20:13:23,682 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 20:13:23,684 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-07-22 20:13:23,685 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-22 20:13:23,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 20:13:23,689 INFO L356 BasicCegarLoop]: Path program histogram: [5, 1, 1, 1, 1, 1] [2022-07-22 20:13:23,691 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-22 20:13:23,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.07 08:13:23 BoogieIcfgContainer [2022-07-22 20:13:23,718 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-22 20:13:23,718 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-22 20:13:23,719 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-22 20:13:23,719 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-22 20:13:23,719 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 08:13:15" (3/4) ... [2022-07-22 20:13:23,722 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-22 20:13:23,722 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-22 20:13:23,722 INFO L158 Benchmark]: Toolchain (without parser) took 8467.99ms. Allocated memory was 86.0MB in the beginning and 125.8MB in the end (delta: 39.8MB). Free memory was 51.2MB in the beginning and 66.4MB in the end (delta: -15.2MB). Peak memory consumption was 23.7MB. Max. memory is 16.1GB. [2022-07-22 20:13:23,722 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 86.0MB. Free memory was 57.0MB in the beginning and 57.0MB in the end (delta: 28.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 20:13:23,723 INFO L158 Benchmark]: CACSL2BoogieTranslator took 307.41ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 51.0MB in the beginning and 79.9MB in the end (delta: -28.9MB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. [2022-07-22 20:13:23,723 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.41ms. Allocated memory is still 104.9MB. Free memory was 79.9MB in the beginning and 78.2MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 20:13:23,723 INFO L158 Benchmark]: Boogie Preprocessor took 35.36ms. Allocated memory is still 104.9MB. Free memory was 78.2MB in the beginning and 77.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 20:13:23,724 INFO L158 Benchmark]: RCFGBuilder took 258.93ms. Allocated memory is still 104.9MB. Free memory was 76.8MB in the beginning and 66.0MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-22 20:13:23,724 INFO L158 Benchmark]: TraceAbstraction took 7811.38ms. Allocated memory was 104.9MB in the beginning and 125.8MB in the end (delta: 21.0MB). Free memory was 65.3MB in the beginning and 66.4MB in the end (delta: -1.1MB). Peak memory consumption was 20.3MB. Max. memory is 16.1GB. [2022-07-22 20:13:23,724 INFO L158 Benchmark]: Witness Printer took 3.41ms. Allocated memory is still 125.8MB. Free memory is still 66.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 20:13:23,725 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 86.0MB. Free memory was 57.0MB in the beginning and 57.0MB in the end (delta: 28.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 307.41ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 51.0MB in the beginning and 79.9MB in the end (delta: -28.9MB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.41ms. Allocated memory is still 104.9MB. Free memory was 79.9MB in the beginning and 78.2MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 35.36ms. Allocated memory is still 104.9MB. Free memory was 78.2MB in the beginning and 77.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 258.93ms. Allocated memory is still 104.9MB. Free memory was 76.8MB in the beginning and 66.0MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 7811.38ms. Allocated memory was 104.9MB in the beginning and 125.8MB in the end (delta: 21.0MB). Free memory was 65.3MB in the beginning and 66.4MB in the end (delta: -1.1MB). Peak memory consumption was 20.3MB. Max. memory is 16.1GB. * Witness Printer took 3.41ms. Allocated memory is still 125.8MB. Free memory is still 66.4MB. 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: 109]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 98, overapproximation of someBinaryDOUBLEComparisonOperation at line 108, overapproximation of someBinaryArithmeticFLOAToperation at line 104. Possible FailurePath: [L115] COND FALSE !(__VERIFIER_nondet_int()) [L118] CALL main2() [L97] float IN = __VERIFIER_nondet_float(); [L98] CALL assume_abort_if_not(IN > -1.2f && IN < 1.2f) [L82] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L98] RET assume_abort_if_not(IN > -1.2f && IN < 1.2f) [L100] CALL, EXPR f(IN) VAL [\old(x)=56] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=56, x=56] [L100] RET, EXPR f(IN) VAL [f(IN)=50, IN=56] [L100] CALL, EXPR fp(IN) VAL [\old(x)=56] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=56, x=56] [L100] RET, EXPR fp(IN) VAL [f(IN)=50, fp(IN)=49, IN=56] [L100] float x = IN - f(IN)/fp(IN); [L102] CALL, EXPR f(x) VAL [\old(x)=51] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=51, x=51] [L102] RET, EXPR f(x) VAL [f(x)=57, IN=56, x=51] [L102] CALL, EXPR fp(x) VAL [\old(x)=51] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=51, x=51] [L102] RET, EXPR fp(x) VAL [f(x)=57, fp(x)=52, IN=56, x=51] [L102] x = x - f(x)/fp(x) [L104] CALL, EXPR f(x) VAL [\old(x)=54] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=54, x=54] [L104] RET, EXPR f(x) VAL [f(x)=53, IN=56, x=54] [L104] CALL, EXPR fp(x) VAL [\old(x)=54] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=54, x=54] [L104] RET, EXPR fp(x) VAL [f(x)=53, fp(x)=55, IN=56, x=54] [L104] x = x - f(x)/fp(x) [L108] COND TRUE !(x < 0.1) VAL [IN=56] [L109] reach_error() VAL [IN=56] - UnprovableResult [Line: 27]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 46 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 7.7s, OverallIterations: 10, TraceHistogramMax: 7, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 131 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 125 mSDsluCounter, 2352 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 22 IncrementalHoareTripleChecker+Unchecked, 1984 mSDsCounter, 103 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 824 IncrementalHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 103 mSolverCounterUnsat, 368 mSDtfsCounter, 824 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 333 GetRequests, 222 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=6, InterpolantAutomatonStates: 72, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 15 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 216 NumberOfCodeBlocks, 212 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 324 ConstructedInterpolants, 10 QuantifiedInterpolants, 2133 SizeOfPredicates, 44 NumberOfNonLiveVariables, 545 ConjunctsInSsa, 105 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 56/326 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-07-22 20:13:23,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/combinations/gcd_4+newton_3_6.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 d2ff4855d3411c2183b4955db69fb0d32886e02ca6014c3e616f77788a55bdc3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 20:13:25,798 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 20:13:25,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 20:13:25,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 20:13:25,849 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 20:13:25,851 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 20:13:25,855 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 20:13:25,859 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 20:13:25,862 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 20:13:25,868 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 20:13:25,869 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 20:13:25,874 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 20:13:25,874 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 20:13:25,876 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 20:13:25,877 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 20:13:25,881 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 20:13:25,882 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 20:13:25,884 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 20:13:25,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 20:13:25,891 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 20:13:25,893 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 20:13:25,894 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 20:13:25,896 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 20:13:25,897 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 20:13:25,899 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 20:13:25,903 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 20:13:25,904 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 20:13:25,904 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 20:13:25,905 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 20:13:25,906 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 20:13:25,907 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 20:13:25,907 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 20:13:25,909 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 20:13:25,909 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 20:13:25,911 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 20:13:25,912 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 20:13:25,912 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 20:13:25,912 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 20:13:25,913 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 20:13:25,913 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 20:13:25,914 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 20:13:25,915 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 20:13:25,916 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-22 20:13:25,958 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 20:13:25,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 20:13:25,959 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 20:13:25,959 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 20:13:25,960 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 20:13:25,960 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 20:13:25,961 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 20:13:25,961 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 20:13:25,961 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 20:13:25,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 20:13:25,963 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 20:13:25,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 20:13:25,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 20:13:25,963 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 20:13:25,963 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 20:13:25,964 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 20:13:25,964 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-22 20:13:25,964 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-22 20:13:25,964 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-22 20:13:25,964 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 20:13:25,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 20:13:25,965 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 20:13:25,965 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 20:13:25,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 20:13:25,965 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 20:13:25,966 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 20:13:25,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 20:13:25,966 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 20:13:25,966 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 20:13:25,966 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 20:13:25,967 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-22 20:13:25,967 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-22 20:13:25,967 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 20:13:25,968 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 20:13:25,968 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 20:13:25,968 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-22 20:13:25,968 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2ff4855d3411c2183b4955db69fb0d32886e02ca6014c3e616f77788a55bdc3 [2022-07-22 20:13:26,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 20:13:26,322 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 20:13:26,325 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 20:13:26,326 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 20:13:26,327 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 20:13:26,328 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_4+newton_3_6.i [2022-07-22 20:13:26,388 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2f7a02ec/d66044da91ff4315be791d0aa6d439d5/FLAGce0306dcc [2022-07-22 20:13:26,866 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 20:13:26,867 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_3_6.i [2022-07-22 20:13:26,876 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2f7a02ec/d66044da91ff4315be791d0aa6d439d5/FLAGce0306dcc [2022-07-22 20:13:26,899 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2f7a02ec/d66044da91ff4315be791d0aa6d439d5 [2022-07-22 20:13:26,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 20:13:26,905 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 20:13:26,906 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 20:13:26,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 20:13:26,910 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 20:13:26,910 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 08:13:26" (1/1) ... [2022-07-22 20:13:26,912 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c0a65f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:13:26, skipping insertion in model container [2022-07-22 20:13:26,912 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 08:13:26" (1/1) ... [2022-07-22 20:13:26,920 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 20:13:26,938 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 20:13:27,087 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/combinations/gcd_4+newton_3_6.i[1224,1237] [2022-07-22 20:13:27,138 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/combinations/gcd_4+newton_3_6.i[2848,2861] [2022-07-22 20:13:27,159 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 20:13:27,171 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 20:13:27,183 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/combinations/gcd_4+newton_3_6.i[1224,1237] [2022-07-22 20:13:27,192 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/combinations/gcd_4+newton_3_6.i[2848,2861] [2022-07-22 20:13:27,193 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 20:13:27,206 INFO L208 MainTranslator]: Completed translation [2022-07-22 20:13:27,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:13:27 WrapperNode [2022-07-22 20:13:27,207 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 20:13:27,208 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 20:13:27,208 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 20:13:27,208 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 20:13:27,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:13:27" (1/1) ... [2022-07-22 20:13:27,224 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:13:27" (1/1) ... [2022-07-22 20:13:27,242 INFO L137 Inliner]: procedures = 28, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 74 [2022-07-22 20:13:27,242 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 20:13:27,243 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 20:13:27,244 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 20:13:27,244 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 20:13:27,251 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:13:27" (1/1) ... [2022-07-22 20:13:27,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:13:27" (1/1) ... [2022-07-22 20:13:27,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:13:27" (1/1) ... [2022-07-22 20:13:27,255 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:13:27" (1/1) ... [2022-07-22 20:13:27,262 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:13:27" (1/1) ... [2022-07-22 20:13:27,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:13:27" (1/1) ... [2022-07-22 20:13:27,267 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:13:27" (1/1) ... [2022-07-22 20:13:27,270 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 20:13:27,271 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 20:13:27,272 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 20:13:27,272 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 20:13:27,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:13:27" (1/1) ... [2022-07-22 20:13:27,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 20:13:27,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:13:27,301 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 20:13:27,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 20:13:27,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 20:13:27,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-22 20:13:27,336 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-07-22 20:13:27,336 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-07-22 20:13:27,336 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-07-22 20:13:27,336 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-07-22 20:13:27,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 20:13:27,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 20:13:27,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 20:13:27,337 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 20:13:27,397 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 20:13:27,398 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 20:13:36,723 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 20:13:36,729 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 20:13:36,729 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 20:13:36,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 08:13:36 BoogieIcfgContainer [2022-07-22 20:13:36,731 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 20:13:36,732 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 20:13:36,732 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 20:13:36,735 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 20:13:36,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 08:13:26" (1/3) ... [2022-07-22 20:13:36,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ddc34b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 08:13:36, skipping insertion in model container [2022-07-22 20:13:36,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:13:27" (2/3) ... [2022-07-22 20:13:36,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ddc34b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 08:13:36, skipping insertion in model container [2022-07-22 20:13:36,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 08:13:36" (3/3) ... [2022-07-22 20:13:36,737 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_3_6.i [2022-07-22 20:13:36,748 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 20:13:36,748 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-22 20:13:36,788 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 20:13:36,794 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2e45357, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6a5a8aa5 [2022-07-22 20:13:36,794 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 20:13:36,798 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-22 20:13:36,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-22 20:13:36,804 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:13:36,805 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:13:36,805 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:13:36,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:13:36,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1780387208, now seen corresponding path program 1 times [2022-07-22 20:13:36,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 20:13:36,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2037373630] [2022-07-22 20:13:36,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:13:36,822 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 20:13:36,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 20:13:36,830 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 20:13:36,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-22 20:13:36,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:13:36,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 20:13:36,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:13:37,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:13:37,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 20:13:37,042 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 20:13:37,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2037373630] [2022-07-22 20:13:37,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2037373630] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:13:37,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:13:37,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 20:13:37,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975693837] [2022-07-22 20:13:37,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:13:37,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:13:37,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 20:13:37,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:13:37,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:13:37,085 INFO L87 Difference]: Start difference. First operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:13:37,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:13:37,191 INFO L93 Difference]: Finished difference Result 99 states and 137 transitions. [2022-07-22 20:13:37,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:13:37,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-22 20:13:37,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:13:37,200 INFO L225 Difference]: With dead ends: 99 [2022-07-22 20:13:37,200 INFO L226 Difference]: Without dead ends: 46 [2022-07-22 20:13:37,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:13:37,206 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 13 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:13:37,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 100 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 20:13:37,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-22 20:13:37,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2022-07-22 20:13:37,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 20:13:37,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2022-07-22 20:13:37,250 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 11 [2022-07-22 20:13:37,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:13:37,251 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2022-07-22 20:13:37,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:13:37,251 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2022-07-22 20:13:37,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-22 20:13:37,252 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:13:37,252 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:13:37,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-22 20:13:37,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 20:13:37,456 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:13:37,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:13:37,457 INFO L85 PathProgramCache]: Analyzing trace with hash 413718792, now seen corresponding path program 1 times [2022-07-22 20:13:37,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 20:13:37,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [958976330] [2022-07-22 20:13:37,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:13:37,458 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 20:13:37,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 20:13:37,459 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 20:13:37,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-22 20:13:37,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:13:37,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 20:13:37,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:13:37,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:13:37,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 20:13:37,607 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 20:13:37,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [958976330] [2022-07-22 20:13:37,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [958976330] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:13:37,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:13:37,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 20:13:37,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225346554] [2022-07-22 20:13:37,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:13:37,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:13:37,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 20:13:37,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:13:37,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:13:37,613 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:13:37,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:13:37,712 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2022-07-22 20:13:37,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:13:37,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-22 20:13:37,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:13:37,714 INFO L225 Difference]: With dead ends: 55 [2022-07-22 20:13:37,715 INFO L226 Difference]: Without dead ends: 41 [2022-07-22 20:13:37,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:13:37,716 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 4 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:13:37,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 80 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 20:13:37,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-22 20:13:37,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-07-22 20:13:37,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 20:13:37,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-07-22 20:13:37,724 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 13 [2022-07-22 20:13:37,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:13:37,724 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-07-22 20:13:37,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:13:37,725 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-07-22 20:13:37,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-22 20:13:37,725 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:13:37,726 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:13:37,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-22 20:13:37,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 20:13:37,936 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:13:37,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:13:37,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1714945339, now seen corresponding path program 1 times [2022-07-22 20:13:37,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 20:13:37,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632522283] [2022-07-22 20:13:37,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:13:37,942 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 20:13:37,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 20:13:37,943 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 20:13:37,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-22 20:13:38,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:13:38,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 20:13:38,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:13:38,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:13:38,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 20:13:38,251 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 20:13:38,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632522283] [2022-07-22 20:13:38,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632522283] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:13:38,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:13:38,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 20:13:38,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312354026] [2022-07-22 20:13:38,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:13:38,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:13:38,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 20:13:38,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:13:38,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:13:38,253 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:13:38,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:13:38,352 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2022-07-22 20:13:38,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:13:38,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-22 20:13:38,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:13:38,353 INFO L225 Difference]: With dead ends: 56 [2022-07-22 20:13:38,353 INFO L226 Difference]: Without dead ends: 43 [2022-07-22 20:13:38,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:13:38,355 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:13:38,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 20:13:38,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-22 20:13:38,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-07-22 20:13:38,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 20:13:38,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-07-22 20:13:38,361 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 15 [2022-07-22 20:13:38,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:13:38,362 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-07-22 20:13:38,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:13:38,362 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-07-22 20:13:38,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-22 20:13:38,363 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:13:38,363 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:13:38,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-22 20:13:38,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 20:13:38,572 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:13:38,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:13:38,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1030187394, now seen corresponding path program 1 times [2022-07-22 20:13:38,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 20:13:38,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1912352656] [2022-07-22 20:13:38,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:13:38,573 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 20:13:38,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 20:13:38,578 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 20:13:38,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-22 20:13:38,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:13:38,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 20:13:38,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:13:39,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:13:39,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:13:39,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:13:39,374 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 20:13:39,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1912352656] [2022-07-22 20:13:39,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1912352656] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:13:39,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 20:13:39,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-07-22 20:13:39,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372359877] [2022-07-22 20:13:39,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 20:13:39,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:13:39,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 20:13:39,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:13:39,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:13:39,376 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:13:39,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:13:39,616 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2022-07-22 20:13:39,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 20:13:39,617 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-22 20:13:39,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:13:39,618 INFO L225 Difference]: With dead ends: 60 [2022-07-22 20:13:39,618 INFO L226 Difference]: Without dead ends: 47 [2022-07-22 20:13:39,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:13:39,620 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 20:13:39,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 115 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 20:13:39,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-22 20:13:39,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-07-22 20:13:39,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 20:13:39,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-07-22 20:13:39,626 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 17 [2022-07-22 20:13:39,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:13:39,627 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-07-22 20:13:39,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:13:39,627 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-07-22 20:13:39,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-22 20:13:39,628 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:13:39,628 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:13:39,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-22 20:13:39,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 20:13:39,831 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:13:39,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:13:39,832 INFO L85 PathProgramCache]: Analyzing trace with hash -626272964, now seen corresponding path program 2 times [2022-07-22 20:13:39,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 20:13:39,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431560392] [2022-07-22 20:13:39,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 20:13:39,833 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 20:13:39,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 20:13:39,834 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 20:13:39,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-22 20:13:39,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 20:13:39,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 20:13:39,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 20:13:39,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:13:41,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 20:13:41,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:13:49,329 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 20:13:49,330 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 20:13:49,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431560392] [2022-07-22 20:13:49,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431560392] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:13:49,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 20:13:49,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-07-22 20:13:49,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473629565] [2022-07-22 20:13:49,331 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 20:13:49,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 20:13:49,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 20:13:49,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 20:13:49,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-07-22 20:13:49,332 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:14:06,981 WARN L233 SmtUtils]: Spent 6.51s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 20:14:19,964 WARN L233 SmtUtils]: Spent 6.29s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 20:14:34,173 WARN L233 SmtUtils]: Spent 8.26s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 20:14:39,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:14:39,701 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2022-07-22 20:14:39,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 20:14:39,739 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-22 20:14:39,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:14:39,740 INFO L225 Difference]: With dead ends: 71 [2022-07-22 20:14:39,740 INFO L226 Difference]: Without dead ends: 68 [2022-07-22 20:14:39,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 49.2s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-07-22 20:14:39,742 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 34 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-07-22 20:14:39,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 406 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2022-07-22 20:14:39,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-22 20:14:39,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2022-07-22 20:14:39,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 52 states have internal predecessors, (59), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-22 20:14:39,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2022-07-22 20:14:39,757 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 21 [2022-07-22 20:14:39,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:14:39,757 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2022-07-22 20:14:39,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:14:39,757 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2022-07-22 20:14:39,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-22 20:14:39,758 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:14:39,759 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:14:39,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-22 20:14:39,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 20:14:39,970 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:14:39,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:14:39,971 INFO L85 PathProgramCache]: Analyzing trace with hash -311360839, now seen corresponding path program 3 times [2022-07-22 20:14:39,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 20:14:39,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [318400987] [2022-07-22 20:14:39,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 20:14:39,971 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 20:14:39,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 20:14:39,973 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 20:14:39,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-22 20:14:40,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 20:14:40,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 20:14:40,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 20:14:40,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:14:40,104 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 20:14:40,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 20:14:40,104 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 20:14:40,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [318400987] [2022-07-22 20:14:40,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [318400987] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:14:40,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:14:40,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 20:14:40,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848573689] [2022-07-22 20:14:40,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:14:40,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:14:40,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 20:14:40,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:14:40,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:14:40,107 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:14:40,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:14:40,176 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2022-07-22 20:14:40,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:14:40,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-22 20:14:40,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:14:40,179 INFO L225 Difference]: With dead ends: 78 [2022-07-22 20:14:40,179 INFO L226 Difference]: Without dead ends: 67 [2022-07-22 20:14:40,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:14:40,180 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 3 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:14:40,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 80 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 20:14:40,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-22 20:14:40,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-07-22 20:14:40,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 50 states have internal predecessors, (55), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-22 20:14:40,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-07-22 20:14:40,190 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 23 [2022-07-22 20:14:40,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:14:40,191 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-07-22 20:14:40,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:14:40,191 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-07-22 20:14:40,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-22 20:14:40,192 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:14:40,192 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:14:40,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-22 20:14:40,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 20:14:40,404 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:14:40,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:14:40,405 INFO L85 PathProgramCache]: Analyzing trace with hash 603968502, now seen corresponding path program 4 times [2022-07-22 20:14:40,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 20:14:40,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [342962855] [2022-07-22 20:14:40,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 20:14:40,405 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 20:14:40,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 20:14:40,406 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 20:14:40,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-22 20:14:40,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 20:14:40,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 20:14:40,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 20:14:40,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:14:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 20:14:41,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:14:42,093 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 20:14:42,094 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 20:14:42,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [342962855] [2022-07-22 20:14:42,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [342962855] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:14:42,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 20:14:42,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-22 20:14:42,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826869209] [2022-07-22 20:14:42,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 20:14:42,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 20:14:42,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 20:14:42,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 20:14:42,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-22 20:14:42,096 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:14:43,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:14:43,227 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2022-07-22 20:14:43,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 20:14:43,237 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-22 20:14:43,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:14:43,238 INFO L225 Difference]: With dead ends: 88 [2022-07-22 20:14:43,238 INFO L226 Difference]: Without dead ends: 64 [2022-07-22 20:14:43,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:14:43,239 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 12 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 20:14:43,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 263 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 20:14:43,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-22 20:14:43,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2022-07-22 20:14:43,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 46 states have internal predecessors, (50), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-22 20:14:43,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2022-07-22 20:14:43,248 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 25 [2022-07-22 20:14:43,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:14:43,248 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2022-07-22 20:14:43,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:14:43,249 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2022-07-22 20:14:43,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-22 20:14:43,250 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:14:43,250 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:14:43,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-22 20:14:43,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 20:14:43,456 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:14:43,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:14:43,456 INFO L85 PathProgramCache]: Analyzing trace with hash 225362363, now seen corresponding path program 1 times [2022-07-22 20:14:43,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 20:14:43,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943790679] [2022-07-22 20:14:43,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:14:43,457 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 20:14:43,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 20:14:43,458 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 20:14:43,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-22 20:14:43,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:14:43,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 20:14:43,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:14:44,442 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 20:14:44,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:14:45,191 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:14:45,191 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 20:14:45,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943790679] [2022-07-22 20:14:45,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1943790679] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:14:45,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 20:14:45,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-07-22 20:14:45,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430129414] [2022-07-22 20:14:45,192 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 20:14:45,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 20:14:45,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 20:14:45,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 20:14:45,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-07-22 20:14:45,193 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 20:14:46,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:14:46,077 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2022-07-22 20:14:46,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 20:14:46,084 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-07-22 20:14:46,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:14:46,086 INFO L225 Difference]: With dead ends: 74 [2022-07-22 20:14:46,086 INFO L226 Difference]: Without dead ends: 60 [2022-07-22 20:14:46,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-07-22 20:14:46,088 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 15 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 20:14:46,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 264 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 63 Invalid, 0 Unknown, 14 Unchecked, 0.5s Time] [2022-07-22 20:14:46,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-22 20:14:46,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-07-22 20:14:46,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 46 states have internal predecessors, (49), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-22 20:14:46,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2022-07-22 20:14:46,099 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 26 [2022-07-22 20:14:46,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:14:46,100 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2022-07-22 20:14:46,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 20:14:46,100 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2022-07-22 20:14:46,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-22 20:14:46,101 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:14:46,101 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:14:46,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-22 20:14:46,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 20:14:46,308 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:14:46,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:14:46,308 INFO L85 PathProgramCache]: Analyzing trace with hash -334589841, now seen corresponding path program 5 times [2022-07-22 20:14:46,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 20:14:46,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [873983524] [2022-07-22 20:14:46,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 20:14:46,309 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 20:14:46,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 20:14:46,310 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 20:14:46,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-22 20:14:46,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-22 20:14:46,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 20:14:46,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 20:14:46,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:14:47,641 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 20:14:47,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:14:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 20:14:50,736 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 20:14:50,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [873983524] [2022-07-22 20:14:50,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [873983524] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:14:50,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 20:14:50,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2022-07-22 20:14:50,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238408481] [2022-07-22 20:14:50,737 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 20:14:50,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 20:14:50,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 20:14:50,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 20:14:50,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-07-22 20:14:50,747 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:14:51,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:14:51,787 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2022-07-22 20:14:51,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 20:14:51,796 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-22 20:14:51,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:14:51,796 INFO L225 Difference]: With dead ends: 75 [2022-07-22 20:14:51,796 INFO L226 Difference]: Without dead ends: 49 [2022-07-22 20:14:51,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-07-22 20:14:51,797 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 11 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:14:51,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 307 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 20:14:51,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-22 20:14:51,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-07-22 20:14:51,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 20:14:51,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-07-22 20:14:51,806 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 27 [2022-07-22 20:14:51,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:14:51,807 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-07-22 20:14:51,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 20:14:51,807 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-07-22 20:14:51,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 20:14:51,812 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:14:51,812 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:14:51,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-22 20:14:52,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 20:14:52,019 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:14:52,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:14:52,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1781630816, now seen corresponding path program 2 times [2022-07-22 20:14:52,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 20:14:52,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1151380915] [2022-07-22 20:14:52,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 20:14:52,020 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 20:14:52,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 20:14:52,021 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 20:14:52,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-22 20:14:52,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 20:14:52,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 20:14:52,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 20:14:52,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:14:53,782 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 20:14:53,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:15:03,327 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 20:15:03,328 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 20:15:03,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1151380915] [2022-07-22 20:15:03,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1151380915] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:15:03,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 20:15:03,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-07-22 20:15:03,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114059572] [2022-07-22 20:15:03,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 20:15:03,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 20:15:03,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 20:15:03,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 20:15:03,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-07-22 20:15:03,329 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 20:15:19,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:15:19,060 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2022-07-22 20:15:19,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 20:15:19,060 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-07-22 20:15:19,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:15:19,061 INFO L225 Difference]: With dead ends: 49 [2022-07-22 20:15:19,061 INFO L226 Difference]: Without dead ends: 23 [2022-07-22 20:15:19,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-07-22 20:15:19,062 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 14 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-07-22 20:15:19,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 389 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-07-22 20:15:19,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-22 20:15:19,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-07-22 20:15:19,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.0) internal successors, (14), 14 states have internal predecessors, (14), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 20:15:19,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-07-22 20:15:19,064 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 28 [2022-07-22 20:15:19,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:15:19,064 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-07-22 20:15:19,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 20:15:19,065 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-07-22 20:15:19,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-22 20:15:19,065 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:15:19,065 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:15:19,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-07-22 20:15:19,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 20:15:19,276 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:15:19,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:15:19,276 INFO L85 PathProgramCache]: Analyzing trace with hash -21288017, now seen corresponding path program 1 times [2022-07-22 20:15:19,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 20:15:19,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2129732129] [2022-07-22 20:15:19,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:15:19,277 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 20:15:19,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 20:15:19,278 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 20:15:19,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process