./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/nested_1-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/loop-acceleration/nested_1-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7d46306d0f449fc697e3921b4f35c60335f25019c8462cefcaf92538159e3d14 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 09:48:43,664 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 09:48:43,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 09:48:43,712 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 09:48:43,713 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 09:48:43,716 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 09:48:43,720 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 09:48:43,722 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 09:48:43,724 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 09:48:43,724 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 09:48:43,725 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 09:48:43,727 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 09:48:43,727 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 09:48:43,732 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 09:48:43,733 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 09:48:43,734 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 09:48:43,737 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 09:48:43,738 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 09:48:43,739 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 09:48:43,743 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 09:48:43,744 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 09:48:43,747 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 09:48:43,748 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 09:48:43,748 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 09:48:43,750 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 09:48:43,751 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 09:48:43,751 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 09:48:43,751 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 09:48:43,752 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 09:48:43,753 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 09:48:43,753 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 09:48:43,753 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 09:48:43,754 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 09:48:43,755 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 09:48:43,756 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 09:48:43,756 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 09:48:43,757 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 09:48:43,757 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 09:48:43,757 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 09:48:43,758 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 09:48:43,758 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 09:48:43,759 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 09:48:43,778 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 09:48:43,778 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 09:48:43,779 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 09:48:43,779 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 09:48:43,780 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 09:48:43,780 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 09:48:43,780 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 09:48:43,780 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 09:48:43,780 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 09:48:43,781 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 09:48:43,781 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 09:48:43,781 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 09:48:43,781 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 09:48:43,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 09:48:43,782 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 09:48:43,782 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 09:48:43,782 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 09:48:43,782 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 09:48:43,782 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 09:48:43,782 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 09:48:43,782 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 09:48:43,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 09:48:43,783 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 09:48:43,783 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 09:48:43,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 09:48:43,783 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 09:48:43,783 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 09:48:43,784 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 09:48:43,784 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 09:48:43,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 09:48:43,785 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 09:48:43,785 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 09:48:43,785 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 09:48:43,785 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 09:48:43,785 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7d46306d0f449fc697e3921b4f35c60335f25019c8462cefcaf92538159e3d14 [2021-12-17 09:48:43,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 09:48:44,011 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 09:48:44,014 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 09:48:44,014 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 09:48:44,015 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 09:48:44,016 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/nested_1-1.c [2021-12-17 09:48:44,074 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f89891299/3b65eb6afb364eafa54697a5d0d32924/FLAGea4d25832 [2021-12-17 09:48:44,373 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 09:48:44,373 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/nested_1-1.c [2021-12-17 09:48:44,381 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f89891299/3b65eb6afb364eafa54697a5d0d32924/FLAGea4d25832 [2021-12-17 09:48:44,809 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f89891299/3b65eb6afb364eafa54697a5d0d32924 [2021-12-17 09:48:44,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 09:48:44,812 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 09:48:44,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 09:48:44,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 09:48:44,816 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 09:48:44,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:48:44" (1/1) ... [2021-12-17 09:48:44,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@439db41e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:48:44, skipping insertion in model container [2021-12-17 09:48:44,819 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:48:44" (1/1) ... [2021-12-17 09:48:44,824 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 09:48:44,832 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 09:48:44,963 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/loop-acceleration/nested_1-1.c[322,335] [2021-12-17 09:48:44,972 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 09:48:44,986 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 09:48:45,000 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/nested_1-1.c[322,335] [2021-12-17 09:48:45,011 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 09:48:45,040 INFO L208 MainTranslator]: Completed translation [2021-12-17 09:48:45,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:48:45 WrapperNode [2021-12-17 09:48:45,040 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 09:48:45,041 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 09:48:45,041 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 09:48:45,042 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 09:48:45,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:48:45" (1/1) ... [2021-12-17 09:48:45,050 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:48:45" (1/1) ... [2021-12-17 09:48:45,061 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2021-12-17 09:48:45,061 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 09:48:45,062 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 09:48:45,062 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 09:48:45,062 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 09:48:45,068 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:48:45" (1/1) ... [2021-12-17 09:48:45,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:48:45" (1/1) ... [2021-12-17 09:48:45,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:48:45" (1/1) ... [2021-12-17 09:48:45,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:48:45" (1/1) ... [2021-12-17 09:48:45,071 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:48:45" (1/1) ... [2021-12-17 09:48:45,073 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:48:45" (1/1) ... [2021-12-17 09:48:45,074 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:48:45" (1/1) ... [2021-12-17 09:48:45,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 09:48:45,075 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 09:48:45,075 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 09:48:45,075 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 09:48:45,076 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:48:45" (1/1) ... [2021-12-17 09:48:45,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 09:48:45,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:48:45,138 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 09:48:45,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 09:48:45,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 09:48:45,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 09:48:45,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 09:48:45,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 09:48:45,202 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 09:48:45,204 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 09:48:45,292 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 09:48:45,296 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 09:48:45,296 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 09:48:45,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:48:45 BoogieIcfgContainer [2021-12-17 09:48:45,298 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 09:48:45,299 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 09:48:45,299 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 09:48:45,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 09:48:45,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 09:48:44" (1/3) ... [2021-12-17 09:48:45,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@461b897e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:48:45, skipping insertion in model container [2021-12-17 09:48:45,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:48:45" (2/3) ... [2021-12-17 09:48:45,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@461b897e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:48:45, skipping insertion in model container [2021-12-17 09:48:45,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:48:45" (3/3) ... [2021-12-17 09:48:45,303 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_1-1.c [2021-12-17 09:48:45,306 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 09:48:45,307 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 09:48:45,343 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 09:48:45,350 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 09:48:45,350 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 09:48:45,360 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:48:45,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-17 09:48:45,367 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:48:45,367 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-17 09:48:45,368 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:48:45,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:48:45,371 INFO L85 PathProgramCache]: Analyzing trace with hash 889646744, now seen corresponding path program 1 times [2021-12-17 09:48:45,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:48:45,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597257747] [2021-12-17 09:48:45,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:48:45,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:48:45,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:48:45,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:48:45,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:48:45,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597257747] [2021-12-17 09:48:45,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597257747] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 09:48:45,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 09:48:45,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 09:48:45,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521647708] [2021-12-17 09:48:45,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 09:48:45,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 09:48:45,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:48:45,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 09:48:45,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 09:48:45,588 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:48:45,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:48:45,612 INFO L93 Difference]: Finished difference Result 27 states and 39 transitions. [2021-12-17 09:48:45,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 09:48:45,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-17 09:48:45,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:48:45,618 INFO L225 Difference]: With dead ends: 27 [2021-12-17 09:48:45,618 INFO L226 Difference]: Without dead ends: 12 [2021-12-17 09:48:45,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 09:48:45,624 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:48:45,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 21 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:48:45,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-12-17 09:48:45,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2021-12-17 09:48:45,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:48:45,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-12-17 09:48:45,644 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-12-17 09:48:45,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:48:45,644 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-12-17 09:48:45,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:48:45,644 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-12-17 09:48:45,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-17 09:48:45,645 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:48:45,645 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:48:45,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 09:48:45,647 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:48:45,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:48:45,648 INFO L85 PathProgramCache]: Analyzing trace with hash 704531011, now seen corresponding path program 1 times [2021-12-17 09:48:45,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:48:45,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763377969] [2021-12-17 09:48:45,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:48:45,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:48:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:48:45,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:48:45,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:48:45,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763377969] [2021-12-17 09:48:45,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763377969] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 09:48:45,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 09:48:45,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 09:48:45,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700758783] [2021-12-17 09:48:45,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 09:48:45,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 09:48:45,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:48:45,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 09:48:45,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 09:48:45,701 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:48:45,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:48:45,711 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2021-12-17 09:48:45,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 09:48:45,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-17 09:48:45,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:48:45,712 INFO L225 Difference]: With dead ends: 18 [2021-12-17 09:48:45,712 INFO L226 Difference]: Without dead ends: 11 [2021-12-17 09:48:45,714 INFO L932 BasicCegarLoop]: 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 [2021-12-17 09:48:45,716 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:48:45,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:48:45,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-12-17 09:48:45,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-12-17 09:48:45,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:48:45,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-12-17 09:48:45,720 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2021-12-17 09:48:45,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:48:45,721 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-12-17 09:48:45,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:48:45,721 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-12-17 09:48:45,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-17 09:48:45,722 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:48:45,722 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:48:45,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 09:48:45,724 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:48:45,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:48:45,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1982141191, now seen corresponding path program 1 times [2021-12-17 09:48:45,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:48:45,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206646552] [2021-12-17 09:48:45,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:48:45,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:48:45,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:48:45,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:48:45,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:48:45,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206646552] [2021-12-17 09:48:45,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206646552] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:48:45,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414526471] [2021-12-17 09:48:45,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:48:45,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:48:45,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:48:45,774 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) [2021-12-17 09:48:45,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 09:48:45,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:48:45,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 09:48:45,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:48:45,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:48:45,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:48:45,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:48:45,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414526471] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:48:45,880 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:48:45,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-17 09:48:45,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431635091] [2021-12-17 09:48:45,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:48:45,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 09:48:45,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:48:45,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 09:48:45,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-12-17 09:48:45,882 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:48:45,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:48:45,905 INFO L93 Difference]: Finished difference Result 22 states and 27 transitions. [2021-12-17 09:48:45,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 09:48:45,905 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-17 09:48:45,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:48:45,905 INFO L225 Difference]: With dead ends: 22 [2021-12-17 09:48:45,906 INFO L226 Difference]: Without dead ends: 14 [2021-12-17 09:48:45,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2021-12-17 09:48:45,907 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:48:45,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:48:45,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-12-17 09:48:45,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-12-17 09:48:45,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:48:45,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-12-17 09:48:45,909 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2021-12-17 09:48:45,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:48:45,910 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-12-17 09:48:45,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:48:45,910 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-12-17 09:48:45,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-17 09:48:45,910 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:48:45,910 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:48:45,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 09:48:46,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:48:46,132 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:48:46,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:48:46,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1640782659, now seen corresponding path program 2 times [2021-12-17 09:48:46,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:48:46,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173421163] [2021-12-17 09:48:46,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:48:46,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:48:46,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:48:46,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:48:46,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:48:46,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173421163] [2021-12-17 09:48:46,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173421163] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:48:46,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174038278] [2021-12-17 09:48:46,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 09:48:46,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:48:46,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:48:46,264 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) [2021-12-17 09:48:46,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 09:48:46,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 09:48:46,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:48:46,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 09:48:46,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:48:46,390 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 09:48:46,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:48:46,466 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 09:48:46,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174038278] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:48:46,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:48:46,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2021-12-17 09:48:46,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361396422] [2021-12-17 09:48:46,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:48:46,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 09:48:46,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:48:46,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 09:48:46,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-12-17 09:48:46,468 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:48:46,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:48:46,755 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2021-12-17 09:48:46,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-17 09:48:46,756 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-17 09:48:46,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:48:46,757 INFO L225 Difference]: With dead ends: 50 [2021-12-17 09:48:46,757 INFO L226 Difference]: Without dead ends: 39 [2021-12-17 09:48:46,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=294, Invalid=896, Unknown=0, NotChecked=0, Total=1190 [2021-12-17 09:48:46,759 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 09:48:46,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 38 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 09:48:46,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-17 09:48:46,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-12-17 09:48:46,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:48:46,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-12-17 09:48:46,764 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 13 [2021-12-17 09:48:46,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:48:46,764 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-12-17 09:48:46,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:48:46,765 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-12-17 09:48:46,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-17 09:48:46,765 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:48:46,765 INFO L514 BasicCegarLoop]: trace histogram [20, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-17 09:48:46,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 09:48:46,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-17 09:48:46,982 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:48:46,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:48:46,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1035828652, now seen corresponding path program 3 times [2021-12-17 09:48:46,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:48:46,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414244335] [2021-12-17 09:48:46,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:48:46,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:48:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:48:47,072 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 112 proven. 15 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-12-17 09:48:47,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:48:47,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414244335] [2021-12-17 09:48:47,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414244335] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:48:47,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803564882] [2021-12-17 09:48:47,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 09:48:47,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:48:47,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:48:47,074 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) [2021-12-17 09:48:47,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 09:48:47,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-17 09:48:47,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:48:47,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-17 09:48:47,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:48:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 115 proven. 15 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-17 09:48:47,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:48:47,341 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 115 proven. 15 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-17 09:48:47,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803564882] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:48:47,341 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:48:47,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-12-17 09:48:47,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536521433] [2021-12-17 09:48:47,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:48:47,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 09:48:47,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:48:47,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 09:48:47,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-12-17 09:48:47,343 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:48:47,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:48:47,464 INFO L93 Difference]: Finished difference Result 89 states and 116 transitions. [2021-12-17 09:48:47,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 09:48:47,464 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-17 09:48:47,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:48:47,465 INFO L225 Difference]: With dead ends: 89 [2021-12-17 09:48:47,465 INFO L226 Difference]: Without dead ends: 59 [2021-12-17 09:48:47,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-12-17 09:48:47,466 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:48:47,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:48:47,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-17 09:48:47,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-12-17 09:48:47,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 58 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:48:47,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2021-12-17 09:48:47,472 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 38 [2021-12-17 09:48:47,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:48:47,472 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2021-12-17 09:48:47,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:48:47,473 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2021-12-17 09:48:47,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-17 09:48:47,474 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:48:47,474 INFO L514 BasicCegarLoop]: trace histogram [40, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-17 09:48:47,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 09:48:47,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:48:47,678 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:48:47,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:48:47,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1228631464, now seen corresponding path program 4 times [2021-12-17 09:48:47,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:48:47,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135108278] [2021-12-17 09:48:47,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:48:47,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:48:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:48:47,836 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-12-17 09:48:47,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:48:47,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135108278] [2021-12-17 09:48:47,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135108278] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:48:47,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521967028] [2021-12-17 09:48:47,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 09:48:47,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:48:47,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:48:47,838 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) [2021-12-17 09:48:47,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 09:48:47,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 09:48:47,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:48:47,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 09:48:47,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:48:48,097 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-12-17 09:48:48,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:48:48,241 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-12-17 09:48:48,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521967028] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:48:48,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:48:48,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-17 09:48:48,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006888701] [2021-12-17 09:48:48,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:48:48,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 09:48:48,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:48:48,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 09:48:48,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-12-17 09:48:48,243 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:48:48,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:48:48,427 INFO L93 Difference]: Finished difference Result 141 states and 156 transitions. [2021-12-17 09:48:48,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 09:48:48,427 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-17 09:48:48,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:48:48,428 INFO L225 Difference]: With dead ends: 141 [2021-12-17 09:48:48,429 INFO L226 Difference]: Without dead ends: 137 [2021-12-17 09:48:48,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2021-12-17 09:48:48,429 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 33 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:48:48,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 81 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:48:48,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-17 09:48:48,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-12-17 09:48:48,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0808823529411764) internal successors, (147), 136 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:48:48,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 147 transitions. [2021-12-17 09:48:48,441 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 147 transitions. Word has length 58 [2021-12-17 09:48:48,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:48:48,441 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 147 transitions. [2021-12-17 09:48:48,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:48:48,441 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 147 transitions. [2021-12-17 09:48:48,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-17 09:48:48,452 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:48:48,452 INFO L514 BasicCegarLoop]: trace histogram [100, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-12-17 09:48:48,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 09:48:48,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:48:48,666 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:48:48,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:48:48,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1191832584, now seen corresponding path program 5 times [2021-12-17 09:48:48,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:48:48,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968692560] [2021-12-17 09:48:48,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:48:48,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:48:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:48:48,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6095 backedges. 0 proven. 5545 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2021-12-17 09:48:48,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:48:48,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968692560] [2021-12-17 09:48:48,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968692560] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:48:48,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250060073] [2021-12-17 09:48:48,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 09:48:48,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:48:48,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:48:49,004 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) [2021-12-17 09:48:49,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 09:48:54,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2021-12-17 09:48:54,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:48:54,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-17 09:48:54,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:48:54,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6095 backedges. 0 proven. 5545 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2021-12-17 09:48:54,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:48:55,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6095 backedges. 0 proven. 5545 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2021-12-17 09:48:55,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250060073] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:48:55,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:48:55,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-17 09:48:55,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163444552] [2021-12-17 09:48:55,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:48:55,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-17 09:48:55,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:48:55,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-17 09:48:55,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2021-12-17 09:48:55,319 INFO L87 Difference]: Start difference. First operand 137 states and 147 transitions. Second operand has 25 states, 25 states have (on average 3.6) internal successors, (90), 25 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:48:59,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:48:59,707 INFO L93 Difference]: Finished difference Result 297 states and 330 transitions. [2021-12-17 09:48:59,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-17 09:48:59,708 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.6) internal successors, (90), 25 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-12-17 09:48:59,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:48:59,709 INFO L225 Difference]: With dead ends: 297 [2021-12-17 09:48:59,709 INFO L226 Difference]: Without dead ends: 293 [2021-12-17 09:48:59,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 260 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=440, Invalid=750, Unknown=0, NotChecked=0, Total=1190 [2021-12-17 09:48:59,710 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 69 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 09:48:59,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 306 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 09:48:59,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-12-17 09:48:59,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2021-12-17 09:48:59,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.0787671232876712) internal successors, (315), 292 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:48:59,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 315 transitions. [2021-12-17 09:48:59,727 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 315 transitions. Word has length 136 [2021-12-17 09:48:59,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:48:59,727 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 315 transitions. [2021-12-17 09:48:59,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.6) internal successors, (90), 25 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:48:59,728 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 315 transitions. [2021-12-17 09:48:59,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-12-17 09:48:59,730 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:48:59,730 INFO L514 BasicCegarLoop]: trace histogram [220, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2021-12-17 09:48:59,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 09:48:59,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:48:59,938 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:48:59,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:48:59,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1761742648, now seen corresponding path program 6 times [2021-12-17 09:48:59,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:48:59,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134761941] [2021-12-17 09:48:59,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:48:59,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:49:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:49:00,560 INFO L134 CoverageAnalysis]: Checked inductivity of 29645 backedges. 0 proven. 28435 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2021-12-17 09:49:00,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:49:00,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134761941] [2021-12-17 09:49:00,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134761941] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:49:00,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268358023] [2021-12-17 09:49:00,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 09:49:00,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:49:00,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:49:00,564 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) [2021-12-17 09:49:00,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 09:49:01,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-12-17 09:49:01,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:49:01,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 09:49:01,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:49:02,251 INFO L134 CoverageAnalysis]: Checked inductivity of 29645 backedges. 2584 proven. 0 refuted. 0 times theorem prover too weak. 27061 trivial. 0 not checked. [2021-12-17 09:49:02,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 09:49:02,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268358023] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 09:49:02,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 09:49:02,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [25] total 29 [2021-12-17 09:49:02,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849131307] [2021-12-17 09:49:02,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 09:49:02,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 09:49:02,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:49:02,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 09:49:02,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-12-17 09:49:02,253 INFO L87 Difference]: Start difference. First operand 293 states and 315 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:49:02,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:49:02,402 INFO L93 Difference]: Finished difference Result 293 states and 315 transitions. [2021-12-17 09:49:02,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 09:49:02,403 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 292 [2021-12-17 09:49:02,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:49:02,403 INFO L225 Difference]: With dead ends: 293 [2021-12-17 09:49:02,403 INFO L226 Difference]: Without dead ends: 0 [2021-12-17 09:49:02,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2021-12-17 09:49:02,405 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 6 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:49:02,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 18 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 5 Unchecked, 0.0s Time] [2021-12-17 09:49:02,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-17 09:49:02,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-17 09:49:02,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:49:02,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-17 09:49:02,405 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 292 [2021-12-17 09:49:02,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:49:02,406 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-17 09:49:02,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:49:02,406 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-17 09:49:02,406 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-17 09:49:02,407 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 09:49:02,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 09:49:02,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:49:02,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-17 09:49:04,816 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-17 09:49:04,816 INFO L854 garLoopResultBuilder]: At program point L19-2(lines 19 21) the Hoare annotation is: (or (= |ULTIMATE.start_main_~x~0#1| 0) (and (< (mod (+ |ULTIMATE.start_main_~x~0#1| 4294967295) 4294967296) 268435455) (< (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 268435455))) [2021-12-17 09:49:04,816 INFO L858 garLoopResultBuilder]: For program point L19-3(lines 19 21) no Hoare annotation was computed. [2021-12-17 09:49:04,816 INFO L858 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2021-12-17 09:49:04,816 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-17 09:49:04,817 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-17 09:49:04,817 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-17 09:49:04,817 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2021-12-17 09:49:04,817 INFO L854 garLoopResultBuilder]: At program point L16-2(lines 16 24) the Hoare annotation is: (or (and (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_~y~0#1| 0)) (< (mod (+ |ULTIMATE.start_main_~x~0#1| 4294967295) 4294967296) 268435455)) [2021-12-17 09:49:04,817 INFO L858 garLoopResultBuilder]: For program point L16-3(lines 16 24) no Hoare annotation was computed. [2021-12-17 09:49:04,817 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 27) no Hoare annotation was computed. [2021-12-17 09:49:04,817 INFO L858 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2021-12-17 09:49:04,817 INFO L861 garLoopResultBuilder]: At program point L6-2(lines 5 10) the Hoare annotation is: true [2021-12-17 09:49:04,820 INFO L732 BasicCegarLoop]: Path program histogram: [6, 1, 1] [2021-12-17 09:49:04,826 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 09:49:04,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 09:49:04 BoogieIcfgContainer [2021-12-17 09:49:04,850 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 09:49:04,851 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 09:49:04,851 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 09:49:04,851 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 09:49:04,851 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:48:45" (3/4) ... [2021-12-17 09:49:04,869 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-17 09:49:04,875 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-12-17 09:49:04,875 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-17 09:49:04,875 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-17 09:49:04,875 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-17 09:49:04,896 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-17 09:49:04,897 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 09:49:04,897 INFO L158 Benchmark]: Toolchain (without parser) took 20084.65ms. Allocated memory was 107.0MB in the beginning and 157.3MB in the end (delta: 50.3MB). Free memory was 72.5MB in the beginning and 71.3MB in the end (delta: 1.1MB). Peak memory consumption was 50.5MB. Max. memory is 16.1GB. [2021-12-17 09:49:04,898 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 107.0MB. Free memory was 78.1MB in the beginning and 78.0MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 09:49:04,898 INFO L158 Benchmark]: CACSL2BoogieTranslator took 226.61ms. Allocated memory is still 107.0MB. Free memory was 72.1MB in the beginning and 84.1MB in the end (delta: -11.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-17 09:49:04,899 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.24ms. Allocated memory is still 107.0MB. Free memory was 83.6MB in the beginning and 82.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 09:49:04,899 INFO L158 Benchmark]: Boogie Preprocessor took 12.54ms. Allocated memory is still 107.0MB. Free memory was 82.0MB in the beginning and 81.1MB in the end (delta: 916.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 09:49:04,899 INFO L158 Benchmark]: RCFGBuilder took 222.48ms. Allocated memory is still 107.0MB. Free memory was 80.6MB in the beginning and 72.0MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 09:49:04,899 INFO L158 Benchmark]: TraceAbstraction took 19551.56ms. Allocated memory was 107.0MB in the beginning and 157.3MB in the end (delta: 50.3MB). Free memory was 71.5MB in the beginning and 73.4MB in the end (delta: -1.9MB). Peak memory consumption was 86.7MB. Max. memory is 16.1GB. [2021-12-17 09:49:04,900 INFO L158 Benchmark]: Witness Printer took 46.14ms. Allocated memory is still 157.3MB. Free memory was 73.4MB in the beginning and 71.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 09:49:04,902 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 107.0MB. Free memory was 78.1MB in the beginning and 78.0MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 226.61ms. Allocated memory is still 107.0MB. Free memory was 72.1MB in the beginning and 84.1MB in the end (delta: -11.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 20.24ms. Allocated memory is still 107.0MB. Free memory was 83.6MB in the beginning and 82.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 12.54ms. Allocated memory is still 107.0MB. Free memory was 82.0MB in the beginning and 81.1MB in the end (delta: 916.5kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 222.48ms. Allocated memory is still 107.0MB. Free memory was 80.6MB in the beginning and 72.0MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 19551.56ms. Allocated memory was 107.0MB in the beginning and 157.3MB in the end (delta: 50.3MB). Free memory was 71.5MB in the beginning and 73.4MB in the end (delta: -1.9MB). Peak memory consumption was 86.7MB. Max. memory is 16.1GB. * Witness Printer took 46.14ms. Allocated memory is still 157.3MB. Free memory was 73.4MB in the beginning and 71.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. 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 - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 19.5s, OverallIterations: 8, TraceHistogramMax: 220, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 5.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 130 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 130 mSDsluCounter, 563 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 5 IncrementalHoareTripleChecker+Unchecked, 466 mSDsCounter, 114 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 581 IncrementalHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 114 mSolverCounterUnsat, 97 mSDtfsCounter, 581 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 905 GetRequests, 768 SyntacticMatches, 3 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 5.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=293occurred in iteration=7, InterpolantAutomatonStates: 94, 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, 8 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 269 NumberOfFragments, 33 HoareAnnotationTreeSize, 3 FomulaSimplifications, 624 FormulaSimplificationTreeSizeReduction, 0.9s HoareSimplificationTime, 3 FomulaSimplificationsInter, 6963 FormulaSimplificationTreeSizeReductionInter, 1.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 6.9s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 1109 NumberOfCodeBlocks, 870 NumberOfCodeBlocksAsserted, 92 NumberOfCheckSat, 1345 ConstructedInterpolants, 1 QuantifiedInterpolants, 6466 SizeOfPredicates, 8 NumberOfNonLiveVariables, 969 ConjunctsInSsa, 72 ConjunctsInUnsatCore, 19 InterpolantComputations, 3 PerfectInterpolantSequences, 34013/81377 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: x == 0 || ((x + 4294967295) % 4294967296 < 268435455 && x % 4294967296 < 268435455) - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: (x == 0 && y == 0) || (x + 4294967295) % 4294967296 < 268435455 RESULT: Ultimate proved your program to be correct! [2021-12-17 09:49:04,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE