./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/num_conversion_2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/bitvector/num_conversion_2.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 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 11:03:02,863 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 11:03:02,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 11:03:02,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 11:03:02,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 11:03:02,904 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 11:03:02,905 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 11:03:02,906 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 11:03:02,908 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 11:03:02,909 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 11:03:02,910 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 11:03:02,911 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 11:03:02,911 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 11:03:02,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 11:03:02,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 11:03:02,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 11:03:02,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 11:03:02,916 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 11:03:02,918 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 11:03:02,920 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 11:03:02,921 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 11:03:02,926 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 11:03:02,927 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 11:03:02,928 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 11:03:02,929 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 11:03:02,932 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 11:03:02,933 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 11:03:02,933 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 11:03:02,934 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 11:03:02,934 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 11:03:02,941 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 11:03:02,942 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 11:03:02,944 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 11:03:02,945 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 11:03:02,947 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 11:03:02,949 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 11:03:02,949 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 11:03:02,950 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 11:03:02,950 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 11:03:02,950 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 11:03:02,951 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 11:03:02,953 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 11:03:02,955 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 11:03:02,988 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 11:03:02,988 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 11:03:02,995 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 11:03:02,995 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 11:03:02,996 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 11:03:02,996 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 11:03:02,996 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 11:03:02,997 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 11:03:02,997 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 11:03:02,997 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 11:03:02,997 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 11:03:02,997 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 11:03:02,998 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 11:03:02,998 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 11:03:02,998 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 11:03:02,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 11:03:02,998 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 11:03:02,999 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 11:03:02,999 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 11:03:02,999 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 11:03:02,999 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 11:03:02,999 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 11:03:03,000 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 11:03:03,000 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 11:03:03,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:03:03,000 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 11:03:03,000 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 11:03:03,001 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 11:03:03,001 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 11:03:03,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 11:03:03,001 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 11:03:03,001 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 11:03:03,002 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 11:03:03,002 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 [2022-07-22 11:03:03,193 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 11:03:03,220 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 11:03:03,222 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 11:03:03,222 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 11:03:03,223 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 11:03:03,224 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/num_conversion_2.c [2022-07-22 11:03:03,279 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a8e96223/8271dbf573004cc081970278bdd5f9fb/FLAG2f83284db [2022-07-22 11:03:03,674 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 11:03:03,675 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/num_conversion_2.c [2022-07-22 11:03:03,682 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a8e96223/8271dbf573004cc081970278bdd5f9fb/FLAG2f83284db [2022-07-22 11:03:03,697 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a8e96223/8271dbf573004cc081970278bdd5f9fb [2022-07-22 11:03:03,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 11:03:03,700 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 11:03:03,703 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 11:03:03,703 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 11:03:03,706 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 11:03:03,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:03:03" (1/1) ... [2022-07-22 11:03:03,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35e61f86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:03:03, skipping insertion in model container [2022-07-22 11:03:03,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:03:03" (1/1) ... [2022-07-22 11:03:03,713 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 11:03:03,729 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 11:03:03,865 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2022-07-22 11:03:03,878 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:03:03,884 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 11:03:03,894 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2022-07-22 11:03:03,897 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:03:03,906 INFO L208 MainTranslator]: Completed translation [2022-07-22 11:03:03,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:03:03 WrapperNode [2022-07-22 11:03:03,907 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 11:03:03,908 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 11:03:03,908 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 11:03:03,908 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 11:03:03,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:03:03" (1/1) ... [2022-07-22 11:03:03,919 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:03:03" (1/1) ... [2022-07-22 11:03:03,932 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2022-07-22 11:03:03,933 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 11:03:03,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 11:03:03,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 11:03:03,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 11:03:03,940 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:03:03" (1/1) ... [2022-07-22 11:03:03,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:03:03" (1/1) ... [2022-07-22 11:03:03,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:03:03" (1/1) ... [2022-07-22 11:03:03,941 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:03:03" (1/1) ... [2022-07-22 11:03:03,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:03:03" (1/1) ... [2022-07-22 11:03:03,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:03:03" (1/1) ... [2022-07-22 11:03:03,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:03:03" (1/1) ... [2022-07-22 11:03:03,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 11:03:03,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 11:03:03,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 11:03:03,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 11:03:03,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:03:03" (1/1) ... [2022-07-22 11:03:03,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:03:03,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:03:03,983 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 11:03:03,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 11:03:04,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 11:03:04,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 11:03:04,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 11:03:04,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 11:03:04,054 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 11:03:04,055 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 11:03:04,131 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 11:03:04,136 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 11:03:04,137 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 11:03:04,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:03:04 BoogieIcfgContainer [2022-07-22 11:03:04,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 11:03:04,140 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 11:03:04,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 11:03:04,143 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 11:03:04,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 11:03:03" (1/3) ... [2022-07-22 11:03:04,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1864d450 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:03:04, skipping insertion in model container [2022-07-22 11:03:04,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:03:03" (2/3) ... [2022-07-22 11:03:04,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1864d450 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:03:04, skipping insertion in model container [2022-07-22 11:03:04,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:03:04" (3/3) ... [2022-07-22 11:03:04,145 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_2.c [2022-07-22 11:03:04,157 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 11:03:04,158 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 11:03:04,196 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 11:03:04,202 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@78f10c66, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@bdc3034 [2022-07-22 11:03:04,202 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 11:03:04,206 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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) [2022-07-22 11:03:04,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-22 11:03:04,210 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:03:04,211 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-22 11:03:04,211 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:03:04,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:03:04,218 INFO L85 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2022-07-22 11:03:04,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:03:04,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370792537] [2022-07-22 11:03:04,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:03:04,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:03:04,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:03:04,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:03:04,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:03:04,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370792537] [2022-07-22 11:03:04,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370792537] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:03:04,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:03:04,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 11:03:04,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844251543] [2022-07-22 11:03:04,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:03:04,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 11:03:04,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:03:04,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 11:03:04,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 11:03:04,397 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2022-07-22 11:03:04,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:03:04,422 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-07-22 11:03:04,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 11:03:04,424 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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 [2022-07-22 11:03:04,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:03:04,431 INFO L225 Difference]: With dead ends: 21 [2022-07-22 11:03:04,431 INFO L226 Difference]: Without dead ends: 9 [2022-07-22 11:03:04,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 11:03:04,439 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:03:04,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:03:04,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-07-22 11:03:04,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-07-22 11:03:04,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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) [2022-07-22 11:03:04,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2022-07-22 11:03:04,468 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2022-07-22 11:03:04,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:03:04,471 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2022-07-22 11:03:04,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2022-07-22 11:03:04,473 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2022-07-22 11:03:04,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-22 11:03:04,474 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:03:04,474 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-22 11:03:04,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 11:03:04,475 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:03:04,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:03:04,476 INFO L85 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2022-07-22 11:03:04,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:03:04,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667025295] [2022-07-22 11:03:04,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:03:04,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:03:04,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:03:04,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:03:04,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:03:04,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667025295] [2022-07-22 11:03:04,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667025295] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:03:04,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:03:04,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:03:04,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855312839] [2022-07-22 11:03:04,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:03:04,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:03:04,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:03:04,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:03:04,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:03:04,553 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. 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) [2022-07-22 11:03:04,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:03:04,583 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2022-07-22 11:03:04,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:03:04,583 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 [2022-07-22 11:03:04,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:03:04,584 INFO L225 Difference]: With dead ends: 16 [2022-07-22 11:03:04,584 INFO L226 Difference]: Without dead ends: 12 [2022-07-22 11:03:04,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:03:04,586 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:03:04,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:03:04,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-07-22 11:03:04,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2022-07-22 11:03:04,590 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) [2022-07-22 11:03:04,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-07-22 11:03:04,590 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2022-07-22 11:03:04,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:03:04,591 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-07-22 11:03:04,591 INFO L496 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) [2022-07-22 11:03:04,591 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-07-22 11:03:04,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-22 11:03:04,592 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:03:04,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:03:04,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 11:03:04,593 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:03:04,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:03:04,593 INFO L85 PathProgramCache]: Analyzing trace with hash 641725625, now seen corresponding path program 1 times [2022-07-22 11:03:04,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:03:04,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651489584] [2022-07-22 11:03:04,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:03:04,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:03:04,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:03:04,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:03:04,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:03:04,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651489584] [2022-07-22 11:03:04,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651489584] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:03:04,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332605267] [2022-07-22 11:03:04,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:03:04,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:03:04,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:03:04,656 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:03:04,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 11:03:04,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:03:04,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 11:03:04,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:03:04,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:03:04,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:03:04,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:03:04,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332605267] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:03:04,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:03:04,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 8 [2022-07-22 11:03:04,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925912263] [2022-07-22 11:03:04,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:03:04,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 11:03:04,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:03:04,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 11:03:04,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-07-22 11:03:04,855 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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) [2022-07-22 11:03:04,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:03:04,910 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2022-07-22 11:03:04,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 11:03:04,910 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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 [2022-07-22 11:03:04,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:03:04,911 INFO L225 Difference]: With dead ends: 23 [2022-07-22 11:03:04,911 INFO L226 Difference]: Without dead ends: 19 [2022-07-22 11:03:04,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:03:04,913 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:03:04,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 29 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:03:04,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-22 11:03:04,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-07-22 11:03:04,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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) [2022-07-22 11:03:04,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-07-22 11:03:04,918 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2022-07-22 11:03:04,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:03:04,918 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-07-22 11:03:04,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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) [2022-07-22 11:03:04,919 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-07-22 11:03:04,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-22 11:03:04,919 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:03:04,919 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-07-22 11:03:04,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 11:03:05,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:03:05,150 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:03:05,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:03:05,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1171899538, now seen corresponding path program 2 times [2022-07-22 11:03:05,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:03:05,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116645840] [2022-07-22 11:03:05,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:03:05,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:03:05,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:03:05,350 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:03:05,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:03:05,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116645840] [2022-07-22 11:03:05,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116645840] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:03:05,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231532702] [2022-07-22 11:03:05,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 11:03:05,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:03:05,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:03:05,353 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:03:05,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 11:03:05,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 11:03:05,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:03:05,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 11:03:05,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:03:05,537 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:03:05,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:03:05,771 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:03:05,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231532702] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:03:05,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:03:05,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 17 [2022-07-22 11:03:05,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142194270] [2022-07-22 11:03:05,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:03:05,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 11:03:05,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:03:05,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 11:03:05,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2022-07-22 11:03:05,775 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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) [2022-07-22 11:03:06,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:03:06,159 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2022-07-22 11:03:06,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 11:03:06,159 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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) Word has length 18 [2022-07-22 11:03:06,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:03:06,160 INFO L225 Difference]: With dead ends: 41 [2022-07-22 11:03:06,160 INFO L226 Difference]: Without dead ends: 37 [2022-07-22 11:03:06,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2022-07-22 11:03:06,162 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 68 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:03:06,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 96 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:03:06,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-22 11:03:06,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-07-22 11:03:06,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 36 states have internal predecessors, (48), 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) [2022-07-22 11:03:06,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-07-22 11:03:06,170 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 18 [2022-07-22 11:03:06,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:03:06,171 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-07-22 11:03:06,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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) [2022-07-22 11:03:06,171 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-07-22 11:03:06,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-22 11:03:06,172 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:03:06,172 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1] [2022-07-22 11:03:06,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 11:03:06,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-22 11:03:06,396 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:03:06,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:03:06,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1720528430, now seen corresponding path program 3 times [2022-07-22 11:03:06,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:03:06,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308098928] [2022-07-22 11:03:06,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:03:06,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:03:06,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 11:03:06,519 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 11:03:06,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 11:03:06,617 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 11:03:06,617 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 11:03:06,618 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-22 11:03:06,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 11:03:06,622 INFO L356 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2022-07-22 11:03:06,626 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-22 11:03:06,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.07 11:03:06 BoogieIcfgContainer [2022-07-22 11:03:06,652 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-22 11:03:06,655 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-22 11:03:06,655 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-22 11:03:06,655 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-22 11:03:06,656 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:03:04" (3/4) ... [2022-07-22 11:03:06,658 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-22 11:03:06,662 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-22 11:03:06,663 INFO L158 Benchmark]: Toolchain (without parser) took 2962.27ms. Allocated memory was 96.5MB in the beginning and 119.5MB in the end (delta: 23.1MB). Free memory was 65.2MB in the beginning and 85.0MB in the end (delta: -19.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-22 11:03:06,663 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 96.5MB. Free memory was 53.0MB in the beginning and 53.0MB in the end (delta: 43.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 11:03:06,664 INFO L158 Benchmark]: CACSL2BoogieTranslator took 204.49ms. Allocated memory is still 96.5MB. Free memory was 65.0MB in the beginning and 72.9MB in the end (delta: -7.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-22 11:03:06,664 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.04ms. Allocated memory is still 96.5MB. Free memory was 72.9MB in the beginning and 71.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 11:03:06,666 INFO L158 Benchmark]: Boogie Preprocessor took 15.58ms. Allocated memory is still 96.5MB. Free memory was 71.2MB in the beginning and 70.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 11:03:06,666 INFO L158 Benchmark]: RCFGBuilder took 188.98ms. Allocated memory is still 96.5MB. Free memory was 70.2MB in the beginning and 61.4MB in the end (delta: 8.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-22 11:03:06,667 INFO L158 Benchmark]: TraceAbstraction took 2514.05ms. Allocated memory was 96.5MB in the beginning and 119.5MB in the end (delta: 23.1MB). Free memory was 61.0MB in the beginning and 85.0MB in the end (delta: -23.9MB). Peak memory consumption was 1.0MB. Max. memory is 16.1GB. [2022-07-22 11:03:06,667 INFO L158 Benchmark]: Witness Printer took 7.49ms. Allocated memory is still 119.5MB. Free memory is still 85.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 11:03:06,669 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 96.5MB. Free memory was 53.0MB in the beginning and 53.0MB in the end (delta: 43.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 204.49ms. Allocated memory is still 96.5MB. Free memory was 65.0MB in the beginning and 72.9MB in the end (delta: -7.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.04ms. Allocated memory is still 96.5MB. Free memory was 72.9MB in the beginning and 71.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 15.58ms. Allocated memory is still 96.5MB. Free memory was 71.2MB in the beginning and 70.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 188.98ms. Allocated memory is still 96.5MB. Free memory was 70.2MB in the beginning and 61.4MB in the end (delta: 8.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 2514.05ms. Allocated memory was 96.5MB in the beginning and 119.5MB in the end (delta: 23.1MB). Free memory was 61.0MB in the beginning and 85.0MB in the end (delta: -23.9MB). Peak memory consumption was 1.0MB. Max. memory is 16.1GB. * Witness Printer took 7.49ms. Allocated memory is still 119.5MB. Free memory is still 85.0MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 16]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of shiftLeft at line 31, overapproximation of bitwiseAnd at line 32. Possible FailurePath: [L24] unsigned char x = __VERIFIER_nondet_uchar(); [L25] unsigned char y; [L26] unsigned char c; [L28] y = 0 [L29] c = 0 VAL [c=0, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [bit=0, c=0, i=0, x=6, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=0, i=0, x=6, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=1, i=0, x=6, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [bit=0, c=1, i=5, x=6, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=1, i=5, x=6, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=2, i=5, x=6, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [bit=0, c=2, i=0, x=6, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=2, i=0, x=6, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=3, i=0, x=6, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [bit=0, c=3, i=0, x=6, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=3, i=0, x=6, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=4, i=0, x=6, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [bit=0, c=4, i=0, x=6, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=4, i=0, x=6, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=5, i=0, x=6, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [bit=0, c=5, i=0, x=6, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=5, i=0, x=6, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=6, i=0, x=6, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [bit=0, c=6, i=0, x=6, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=6, i=0, x=6, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=7, i=0, x=6, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [bit=0, c=7, i=4, x=6, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=7, i=4, x=6, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=8, i=4, x=6, y=0] [L30] COND FALSE !(c < (unsigned char)8) VAL [bit=0, c=8, i=4, x=6, y=0] [L38] CALL __VERIFIER_assert(x == y) [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L16] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.4s, OverallIterations: 5, TraceHistogramMax: 8, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 98 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 98 mSDsluCounter, 153 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 106 mSDsCounter, 33 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 104 IncrementalHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 33 mSolverCounterUnsat, 47 mSDtfsCounter, 104 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=4, InterpolantAutomatonStates: 26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 96 NumberOfCodeBlocks, 96 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 85 ConstructedInterpolants, 0 QuantifiedInterpolants, 606 SizeOfPredicates, 6 NumberOfNonLiveVariables, 109 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 0/69 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-07-22 11:03:06,697 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 Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/bitvector/num_conversion_2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 11:03:08,636 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 11:03:08,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 11:03:08,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 11:03:08,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 11:03:08,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 11:03:08,689 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 11:03:08,693 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 11:03:08,694 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 11:03:08,699 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 11:03:08,700 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 11:03:08,704 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 11:03:08,705 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 11:03:08,707 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 11:03:08,708 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 11:03:08,711 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 11:03:08,711 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 11:03:08,713 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 11:03:08,714 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 11:03:08,720 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 11:03:08,721 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 11:03:08,722 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 11:03:08,724 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 11:03:08,725 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 11:03:08,726 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 11:03:08,732 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 11:03:08,733 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 11:03:08,733 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 11:03:08,734 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 11:03:08,734 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 11:03:08,735 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 11:03:08,735 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 11:03:08,737 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 11:03:08,738 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 11:03:08,739 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 11:03:08,740 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 11:03:08,740 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 11:03:08,740 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 11:03:08,740 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 11:03:08,741 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 11:03:08,741 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 11:03:08,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 11:03:08,748 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-22 11:03:08,779 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 11:03:08,779 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 11:03:08,780 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 11:03:08,780 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 11:03:08,780 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 11:03:08,781 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 11:03:08,781 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 11:03:08,781 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 11:03:08,782 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 11:03:08,782 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 11:03:08,783 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 11:03:08,783 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 11:03:08,783 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 11:03:08,783 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 11:03:08,783 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 11:03:08,784 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 11:03:08,784 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-22 11:03:08,784 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-22 11:03:08,784 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-22 11:03:08,784 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 11:03:08,785 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 11:03:08,785 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 11:03:08,785 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 11:03:08,785 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 11:03:08,785 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 11:03:08,785 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 11:03:08,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:03:08,786 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 11:03:08,786 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 11:03:08,786 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 11:03:08,787 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-22 11:03:08,787 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-22 11:03:08,787 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 11:03:08,787 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 11:03:08,787 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 11:03:08,788 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-22 11:03:08,788 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 [2022-07-22 11:03:09,098 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 11:03:09,114 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 11:03:09,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 11:03:09,117 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 11:03:09,118 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 11:03:09,120 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/num_conversion_2.c [2022-07-22 11:03:09,175 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9920ea4be/37d4f7e89cf54142825a2860d9230010/FLAG0ee192c1e [2022-07-22 11:03:09,599 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 11:03:09,600 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/num_conversion_2.c [2022-07-22 11:03:09,605 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9920ea4be/37d4f7e89cf54142825a2860d9230010/FLAG0ee192c1e [2022-07-22 11:03:10,013 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9920ea4be/37d4f7e89cf54142825a2860d9230010 [2022-07-22 11:03:10,015 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 11:03:10,017 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 11:03:10,019 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 11:03:10,020 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 11:03:10,023 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 11:03:10,024 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:03:10" (1/1) ... [2022-07-22 11:03:10,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ce34006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:03:10, skipping insertion in model container [2022-07-22 11:03:10,025 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:03:10" (1/1) ... [2022-07-22 11:03:10,031 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 11:03:10,046 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 11:03:10,183 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2022-07-22 11:03:10,194 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:03:10,203 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 11:03:10,221 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2022-07-22 11:03:10,230 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:03:10,255 INFO L208 MainTranslator]: Completed translation [2022-07-22 11:03:10,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:03:10 WrapperNode [2022-07-22 11:03:10,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 11:03:10,257 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 11:03:10,257 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 11:03:10,258 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 11:03:10,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:03:10" (1/1) ... [2022-07-22 11:03:10,270 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:03:10" (1/1) ... [2022-07-22 11:03:10,297 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2022-07-22 11:03:10,298 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 11:03:10,303 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 11:03:10,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 11:03:10,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 11:03:10,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:03:10" (1/1) ... [2022-07-22 11:03:10,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:03:10" (1/1) ... [2022-07-22 11:03:10,324 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:03:10" (1/1) ... [2022-07-22 11:03:10,324 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:03:10" (1/1) ... [2022-07-22 11:03:10,327 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:03:10" (1/1) ... [2022-07-22 11:03:10,330 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:03:10" (1/1) ... [2022-07-22 11:03:10,331 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:03:10" (1/1) ... [2022-07-22 11:03:10,333 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 11:03:10,334 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 11:03:10,334 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 11:03:10,334 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 11:03:10,335 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:03:10" (1/1) ... [2022-07-22 11:03:10,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:03:10,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:03:10,369 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 11:03:10,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 11:03:10,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 11:03:10,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 11:03:10,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 11:03:10,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-22 11:03:10,477 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 11:03:10,478 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 11:03:10,606 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 11:03:10,611 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 11:03:10,613 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 11:03:10,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:03:10 BoogieIcfgContainer [2022-07-22 11:03:10,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 11:03:10,621 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 11:03:10,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 11:03:10,624 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 11:03:10,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 11:03:10" (1/3) ... [2022-07-22 11:03:10,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74291eff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:03:10, skipping insertion in model container [2022-07-22 11:03:10,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:03:10" (2/3) ... [2022-07-22 11:03:10,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74291eff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:03:10, skipping insertion in model container [2022-07-22 11:03:10,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:03:10" (3/3) ... [2022-07-22 11:03:10,627 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_2.c [2022-07-22 11:03:10,640 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 11:03:10,641 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 11:03:10,696 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 11:03:10,704 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7440fc57, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@20c998ac [2022-07-22 11:03:10,704 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 11:03:10,710 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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) [2022-07-22 11:03:10,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-22 11:03:10,724 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:03:10,725 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-22 11:03:10,726 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:03:10,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:03:10,732 INFO L85 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2022-07-22 11:03:10,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:03:10,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2029785215] [2022-07-22 11:03:10,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:03:10,743 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:03:10,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:03:10,746 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:03:10,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-22 11:03:10,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:03:10,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-22 11:03:10,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:03:10,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:03:10,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:03:10,825 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:03:10,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2029785215] [2022-07-22 11:03:10,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2029785215] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:03:10,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:03:10,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 11:03:10,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316770635] [2022-07-22 11:03:10,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:03:10,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 11:03:10,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:03:10,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 11:03:10,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 11:03:10,874 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2022-07-22 11:03:10,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:03:10,884 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-07-22 11:03:10,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 11:03:10,888 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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 [2022-07-22 11:03:10,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:03:10,894 INFO L225 Difference]: With dead ends: 21 [2022-07-22 11:03:10,894 INFO L226 Difference]: Without dead ends: 9 [2022-07-22 11:03:10,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 11:03:10,902 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:03:10,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:03:10,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-07-22 11:03:10,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-07-22 11:03:10,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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) [2022-07-22 11:03:10,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2022-07-22 11:03:10,930 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2022-07-22 11:03:10,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:03:10,931 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2022-07-22 11:03:10,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2022-07-22 11:03:10,932 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2022-07-22 11:03:10,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-22 11:03:10,932 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:03:10,932 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-22 11:03:10,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-22 11:03:11,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:03:11,141 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:03:11,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:03:11,141 INFO L85 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2022-07-22 11:03:11,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:03:11,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1317229956] [2022-07-22 11:03:11,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:03:11,143 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:03:11,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:03:11,145 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:03:11,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-22 11:03:11,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:03:11,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 11:03:11,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:03:11,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:03:11,200 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:03:11,200 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:03:11,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1317229956] [2022-07-22 11:03:11,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1317229956] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:03:11,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:03:11,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:03:11,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310654649] [2022-07-22 11:03:11,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:03:11,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:03:11,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:03:11,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:03:11,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:03:11,204 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. 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) [2022-07-22 11:03:11,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:03:11,214 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2022-07-22 11:03:11,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:03:11,215 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 [2022-07-22 11:03:11,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:03:11,215 INFO L225 Difference]: With dead ends: 16 [2022-07-22 11:03:11,215 INFO L226 Difference]: Without dead ends: 12 [2022-07-22 11:03:11,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:03:11,217 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:03:11,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:03:11,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-07-22 11:03:11,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2022-07-22 11:03:11,220 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) [2022-07-22 11:03:11,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-07-22 11:03:11,221 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2022-07-22 11:03:11,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:03:11,221 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-07-22 11:03:11,221 INFO L496 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) [2022-07-22 11:03:11,222 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-07-22 11:03:11,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-22 11:03:11,222 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:03:11,222 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:03:11,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-22 11:03:11,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:03:11,431 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:03:11,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:03:11,436 INFO L85 PathProgramCache]: Analyzing trace with hash 641725625, now seen corresponding path program 1 times [2022-07-22 11:03:11,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:03:11,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1976057518] [2022-07-22 11:03:11,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:03:11,436 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:03:11,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:03:11,441 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:03:11,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-22 11:03:11,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:03:11,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 11:03:11,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:03:11,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:03:11,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:03:11,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:03:11,553 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:03:11,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1976057518] [2022-07-22 11:03:11,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1976057518] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:03:11,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:03:11,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-07-22 11:03:11,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157089558] [2022-07-22 11:03:11,554 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:03:11,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 11:03:11,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:03:11,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 11:03:11,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:03:11,556 INFO L87 Difference]: Start difference. First operand 10 states and 11 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) [2022-07-22 11:03:11,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:03:11,601 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2022-07-22 11:03:11,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 11:03:11,601 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 9 [2022-07-22 11:03:11,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:03:11,602 INFO L225 Difference]: With dead ends: 23 [2022-07-22 11:03:11,602 INFO L226 Difference]: Without dead ends: 19 [2022-07-22 11:03:11,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:03:11,604 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 19 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:03:11,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 24 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:03:11,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-22 11:03:11,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-07-22 11:03:11,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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) [2022-07-22 11:03:11,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-07-22 11:03:11,609 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2022-07-22 11:03:11,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:03:11,610 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-07-22 11:03:11,610 INFO L496 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) [2022-07-22 11:03:11,610 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-07-22 11:03:11,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-22 11:03:11,611 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:03:11,611 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-07-22 11:03:11,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-22 11:03:11,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:03:11,820 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:03:11,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:03:11,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1171899538, now seen corresponding path program 2 times [2022-07-22 11:03:11,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:03:11,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [56348282] [2022-07-22 11:03:11,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 11:03:11,822 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:03:11,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:03:11,823 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:03:11,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-22 11:03:11,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 11:03:11,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:03:11,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 11:03:11,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:03:11,937 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:03:11,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:03:12,052 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:03:12,052 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:03:12,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [56348282] [2022-07-22 11:03:12,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [56348282] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:03:12,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:03:12,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-07-22 11:03:12,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371462661] [2022-07-22 11:03:12,053 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:03:12,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 11:03:12,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:03:12,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 11:03:12,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-07-22 11:03:12,057 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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) [2022-07-22 11:03:12,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:03:12,180 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2022-07-22 11:03:12,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 11:03:12,181 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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 18 [2022-07-22 11:03:12,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:03:12,182 INFO L225 Difference]: With dead ends: 35 [2022-07-22 11:03:12,182 INFO L226 Difference]: Without dead ends: 31 [2022-07-22 11:03:12,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-07-22 11:03:12,184 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:03:12,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 82 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:03:12,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-22 11:03:12,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-07-22 11:03:12,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 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) [2022-07-22 11:03:12,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2022-07-22 11:03:12,191 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 18 [2022-07-22 11:03:12,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:03:12,191 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2022-07-22 11:03:12,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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) [2022-07-22 11:03:12,192 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2022-07-22 11:03:12,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-22 11:03:12,192 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:03:12,193 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1] [2022-07-22 11:03:12,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-22 11:03:12,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:03:12,401 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:03:12,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:03:12,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1720528430, now seen corresponding path program 3 times [2022-07-22 11:03:12,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:03:12,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409073148] [2022-07-22 11:03:12,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 11:03:12,403 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:03:12,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:03:12,405 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:03:12,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-22 11:03:12,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-22 11:03:12,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:03:12,447 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-22 11:03:12,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:03:14,702 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 40 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:03:14,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:03:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:03:17,514 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:03:17,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409073148] [2022-07-22 11:03:17,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409073148] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:03:17,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:03:17,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 53 [2022-07-22 11:03:17,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284180108] [2022-07-22 11:03:17,515 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:03:17,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-22 11:03:17,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:03:17,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-22 11:03:17,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=586, Invalid=2170, Unknown=0, NotChecked=0, Total=2756 [2022-07-22 11:03:17,518 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 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) [2022-07-22 11:03:22,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:03:22,027 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2022-07-22 11:03:22,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-22 11:03:22,029 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 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 30 [2022-07-22 11:03:22,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:03:22,030 INFO L225 Difference]: With dead ends: 96 [2022-07-22 11:03:22,030 INFO L226 Difference]: Without dead ends: 92 [2022-07-22 11:03:22,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2223 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1669, Invalid=5813, Unknown=0, NotChecked=0, Total=7482 [2022-07-22 11:03:22,034 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 46 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 263 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:03:22,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 55 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 165 Invalid, 0 Unknown, 263 Unchecked, 0.2s Time] [2022-07-22 11:03:22,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-22 11:03:22,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 52. [2022-07-22 11:03:22,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 51 states have internal predecessors, (67), 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) [2022-07-22 11:03:22,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2022-07-22 11:03:22,045 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 30 [2022-07-22 11:03:22,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:03:22,045 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2022-07-22 11:03:22,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 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) [2022-07-22 11:03:22,046 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2022-07-22 11:03:22,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-22 11:03:22,047 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:03:22,047 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:03:22,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-22 11:03:22,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:03:22,256 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:03:22,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:03:22,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1777786732, now seen corresponding path program 1 times [2022-07-22 11:03:22,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:03:22,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [465505280] [2022-07-22 11:03:22,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:03:22,257 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:03:22,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:03:22,258 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:03:22,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-22 11:03:22,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:03:22,281 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-22 11:03:22,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:03:23,167 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:03:23,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:03:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:03:25,497 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:03:25,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [465505280] [2022-07-22 11:03:25,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [465505280] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:03:25,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:03:25,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-07-22 11:03:25,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354556824] [2022-07-22 11:03:25,498 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:03:25,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-22 11:03:25,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:03:25,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-22 11:03:25,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=2240, Unknown=0, NotChecked=0, Total=2652 [2022-07-22 11:03:25,501 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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) [2022-07-22 11:03:56,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:03:56,561 INFO L93 Difference]: Finished difference Result 319 states and 417 transitions. [2022-07-22 11:03:56,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2022-07-22 11:03:56,562 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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 30 [2022-07-22 11:03:56,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:03:56,565 INFO L225 Difference]: With dead ends: 319 [2022-07-22 11:03:56,565 INFO L226 Difference]: Without dead ends: 285 [2022-07-22 11:03:56,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16710 ImplicationChecksByTransitivity, 31.0s TimeCoverageRelationStatistics Valid=7758, Invalid=41748, Unknown=0, NotChecked=0, Total=49506 [2022-07-22 11:03:56,576 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 277 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 1598 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 2274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 1598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:03:56,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 115 Invalid, 2274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 1598 Invalid, 0 Unknown, 136 Unchecked, 2.3s Time] [2022-07-22 11:03:56,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-07-22 11:03:56,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 160. [2022-07-22 11:03:56,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.3647798742138364) internal successors, (217), 159 states have internal predecessors, (217), 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) [2022-07-22 11:03:56,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 217 transitions. [2022-07-22 11:03:56,620 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 217 transitions. Word has length 30 [2022-07-22 11:03:56,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:03:56,620 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 217 transitions. [2022-07-22 11:03:56,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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) [2022-07-22 11:03:56,621 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 217 transitions. [2022-07-22 11:03:56,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-22 11:03:56,622 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:03:56,622 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:03:56,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-22 11:03:56,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:03:56,824 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:03:56,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:03:56,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1894380496, now seen corresponding path program 2 times [2022-07-22 11:03:56,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:03:56,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127463065] [2022-07-22 11:03:56,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 11:03:56,825 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:03:56,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:03:56,826 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:03:56,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-22 11:03:56,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 11:03:56,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:03:56,856 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-22 11:03:56,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:03:57,690 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:03:57,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:04:00,040 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:04:00,040 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:04:00,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127463065] [2022-07-22 11:04:00,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1127463065] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:04:00,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:04:00,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-07-22 11:04:00,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508397520] [2022-07-22 11:04:00,041 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:04:00,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-22 11:04:00,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:04:00,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-22 11:04:00,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=2283, Unknown=0, NotChecked=0, Total=2652 [2022-07-22 11:04:00,043 INFO L87 Difference]: Start difference. First operand 160 states and 217 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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) [2022-07-22 11:04:30,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:30,615 INFO L93 Difference]: Finished difference Result 395 states and 511 transitions. [2022-07-22 11:04:30,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-07-22 11:04:30,616 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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 30 [2022-07-22 11:04:30,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:30,617 INFO L225 Difference]: With dead ends: 395 [2022-07-22 11:04:30,617 INFO L226 Difference]: Without dead ends: 338 [2022-07-22 11:04:30,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13552 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=5749, Invalid=34451, Unknown=0, NotChecked=0, Total=40200 [2022-07-22 11:04:30,621 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 277 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 1687 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 2151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 1687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:30,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 134 Invalid, 2151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 1687 Invalid, 0 Unknown, 105 Unchecked, 1.9s Time] [2022-07-22 11:04:30,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-07-22 11:04:30,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 184. [2022-07-22 11:04:30,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.349726775956284) internal successors, (247), 183 states have internal predecessors, (247), 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) [2022-07-22 11:04:30,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 247 transitions. [2022-07-22 11:04:30,665 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 247 transitions. Word has length 30 [2022-07-22 11:04:30,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:30,665 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 247 transitions. [2022-07-22 11:04:30,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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) [2022-07-22 11:04:30,665 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 247 transitions. [2022-07-22 11:04:30,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-22 11:04:30,666 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:30,666 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:30,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:30,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:04:30,867 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:30,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:30,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1978693868, now seen corresponding path program 3 times [2022-07-22 11:04:30,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:04:30,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147343468] [2022-07-22 11:04:30,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 11:04:30,868 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:04:30,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:04:30,869 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:04:30,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-22 11:04:30,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-22 11:04:30,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:04:30,900 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-22 11:04:30,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:32,329 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:04:32,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:04:35,540 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:04:35,541 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:04:35,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147343468] [2022-07-22 11:04:35,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147343468] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:04:35,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:04:35,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2022-07-22 11:04:35,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945710363] [2022-07-22 11:04:35,541 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:04:35,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-22 11:04:35,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:04:35,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-22 11:04:35,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=2398, Unknown=0, NotChecked=0, Total=2862 [2022-07-22 11:04:35,543 INFO L87 Difference]: Start difference. First operand 184 states and 247 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 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) [2022-07-22 11:04:40,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:40,152 INFO L93 Difference]: Finished difference Result 409 states and 537 transitions. [2022-07-22 11:04:40,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-22 11:04:40,152 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 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 30 [2022-07-22 11:04:40,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:40,154 INFO L225 Difference]: With dead ends: 409 [2022-07-22 11:04:40,154 INFO L226 Difference]: Without dead ends: 403 [2022-07-22 11:04:40,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2033 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1311, Invalid=5999, Unknown=0, NotChecked=0, Total=7310 [2022-07-22 11:04:40,156 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 64 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 417 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:40,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 67 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 204 Invalid, 0 Unknown, 417 Unchecked, 0.2s Time] [2022-07-22 11:04:40,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-07-22 11:04:40,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 263. [2022-07-22 11:04:40,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.3435114503816794) internal successors, (352), 262 states have internal predecessors, (352), 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) [2022-07-22 11:04:40,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 352 transitions. [2022-07-22 11:04:40,207 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 352 transitions. Word has length 30 [2022-07-22 11:04:40,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:40,208 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 352 transitions. [2022-07-22 11:04:40,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 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) [2022-07-22 11:04:40,208 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 352 transitions. [2022-07-22 11:04:40,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-22 11:04:40,209 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:40,209 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:40,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:40,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:04:40,418 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:40,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:40,418 INFO L85 PathProgramCache]: Analyzing trace with hash -2035952170, now seen corresponding path program 4 times [2022-07-22 11:04:40,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:04:40,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078932428] [2022-07-22 11:04:40,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 11:04:40,419 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:04:40,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:04:40,420 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:04:40,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-22 11:04:40,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 11:04:40,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:04:40,445 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-22 11:04:40,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:41,285 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:04:41,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:04:43,718 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:04:43,718 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:04:43,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078932428] [2022-07-22 11:04:43,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1078932428] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:04:43,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:04:43,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-07-22 11:04:43,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576818628] [2022-07-22 11:04:43,719 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:04:43,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-22 11:04:43,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:04:43,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-22 11:04:43,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=2256, Unknown=0, NotChecked=0, Total=2652 [2022-07-22 11:04:43,721 INFO L87 Difference]: Start difference. First operand 263 states and 352 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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) [2022-07-22 11:05:26,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:26,403 INFO L93 Difference]: Finished difference Result 587 states and 774 transitions. [2022-07-22 11:05:26,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-07-22 11:05:26,404 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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 30 [2022-07-22 11:05:26,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:26,406 INFO L225 Difference]: With dead ends: 587 [2022-07-22 11:05:26,406 INFO L226 Difference]: Without dead ends: 565 [2022-07-22 11:05:26,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20028 ImplicationChecksByTransitivity, 42.6s TimeCoverageRelationStatistics Valid=8138, Invalid=49222, Unknown=0, NotChecked=0, Total=57360 [2022-07-22 11:05:26,411 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 281 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1810 mSolverCounterSat, 512 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 2449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 512 IncrementalHoareTripleChecker+Valid, 1810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:26,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 145 Invalid, 2449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [512 Valid, 1810 Invalid, 0 Unknown, 127 Unchecked, 2.4s Time] [2022-07-22 11:05:26,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-07-22 11:05:26,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 382. [2022-07-22 11:05:26,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 1.3595800524934383) internal successors, (518), 381 states have internal predecessors, (518), 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) [2022-07-22 11:05:26,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 518 transitions. [2022-07-22 11:05:26,515 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 518 transitions. Word has length 30 [2022-07-22 11:05:26,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:26,516 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 518 transitions. [2022-07-22 11:05:26,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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) [2022-07-22 11:05:26,516 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 518 transitions. [2022-07-22 11:05:26,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-22 11:05:26,517 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:26,518 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2022-07-22 11:05:26,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-22 11:05:26,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:05:26,727 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:26,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:26,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1636215058, now seen corresponding path program 5 times [2022-07-22 11:05:26,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:05:26,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [528271977] [2022-07-22 11:05:26,728 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 11:05:26,728 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:05:26,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:05:26,729 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:05:26,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-22 11:05:26,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-07-22 11:05:26,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:05:26,760 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-22 11:05:26,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:27,597 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:05:27,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:05:30,182 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:05:30,182 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:05:30,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [528271977] [2022-07-22 11:05:30,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [528271977] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:05:30,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:05:30,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-07-22 11:05:30,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067530837] [2022-07-22 11:05:30,183 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:05:30,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-22 11:05:30,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:05:30,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-22 11:05:30,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=2259, Unknown=0, NotChecked=0, Total=2652 [2022-07-22 11:05:30,184 INFO L87 Difference]: Start difference. First operand 382 states and 518 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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) [2022-07-22 11:05:58,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:58,892 INFO L93 Difference]: Finished difference Result 620 states and 831 transitions. [2022-07-22 11:05:58,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-07-22 11:05:58,896 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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 30 [2022-07-22 11:05:58,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:58,898 INFO L225 Difference]: With dead ends: 620 [2022-07-22 11:05:58,898 INFO L226 Difference]: Without dead ends: 579 [2022-07-22 11:05:58,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8553 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=4227, Invalid=24503, Unknown=0, NotChecked=0, Total=28730 [2022-07-22 11:05:58,901 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 177 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1659 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 2031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:58,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 80 Invalid, 2031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1659 Invalid, 0 Unknown, 93 Unchecked, 1.7s Time] [2022-07-22 11:05:58,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-07-22 11:05:58,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 428. [2022-07-22 11:05:58,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 1.3559718969555035) internal successors, (579), 427 states have internal predecessors, (579), 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) [2022-07-22 11:05:58,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 579 transitions. [2022-07-22 11:05:58,988 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 579 transitions. Word has length 30 [2022-07-22 11:05:58,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:58,988 INFO L495 AbstractCegarLoop]: Abstraction has 428 states and 579 transitions. [2022-07-22 11:05:58,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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) [2022-07-22 11:05:58,988 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 579 transitions. [2022-07-22 11:05:58,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-22 11:05:58,989 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:58,989 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2022-07-22 11:05:58,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-07-22 11:05:59,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:05:59,197 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:59,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:59,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1578956756, now seen corresponding path program 6 times [2022-07-22 11:05:59,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:05:59,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1794938520] [2022-07-22 11:05:59,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 11:05:59,198 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:05:59,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:05:59,199 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:05:59,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-22 11:05:59,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-22 11:05:59,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:05:59,244 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-22 11:05:59,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:06:00,247 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:06:00,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:06:03,244 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:06:03,244 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:06:03,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1794938520] [2022-07-22 11:06:03,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1794938520] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:06:03,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:06:03,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2022-07-22 11:06:03,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237955191] [2022-07-22 11:06:03,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:06:03,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-22 11:06:03,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:06:03,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-22 11:06:03,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=2449, Unknown=0, NotChecked=0, Total=2862 [2022-07-22 11:06:03,247 INFO L87 Difference]: Start difference. First operand 428 states and 579 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 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) [2022-07-22 11:06:08,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:06:08,689 INFO L93 Difference]: Finished difference Result 623 states and 844 transitions. [2022-07-22 11:06:08,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-22 11:06:08,689 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 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 30 [2022-07-22 11:06:08,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:06:08,691 INFO L225 Difference]: With dead ends: 623 [2022-07-22 11:06:08,691 INFO L226 Difference]: Without dead ends: 617 [2022-07-22 11:06:08,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1768 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=895, Invalid=6415, Unknown=0, NotChecked=0, Total=7310 [2022-07-22 11:06:08,693 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 56 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:06:08,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 87 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 280 Invalid, 0 Unknown, 242 Unchecked, 0.1s Time] [2022-07-22 11:06:08,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-07-22 11:06:08,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 550. [2022-07-22 11:06:08,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 1.3734061930783241) internal successors, (754), 549 states have internal predecessors, (754), 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) [2022-07-22 11:06:08,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 754 transitions. [2022-07-22 11:06:08,821 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 754 transitions. Word has length 30 [2022-07-22 11:06:08,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:06:08,821 INFO L495 AbstractCegarLoop]: Abstraction has 550 states and 754 transitions. [2022-07-22 11:06:08,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 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) [2022-07-22 11:06:08,822 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 754 transitions. [2022-07-22 11:06:08,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-22 11:06:08,823 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:06:08,823 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2022-07-22 11:06:08,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-22 11:06:09,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:06:09,031 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:06:09,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:06:09,032 INFO L85 PathProgramCache]: Analyzing trace with hash -497923054, now seen corresponding path program 7 times [2022-07-22 11:06:09,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:06:09,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220426388] [2022-07-22 11:06:09,032 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 11:06:09,032 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:06:09,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:06:09,033 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:06:09,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-22 11:06:09,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:06:09,054 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-22 11:06:09,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:06:09,822 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:06:09,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:06:12,130 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:06:12,130 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:06:12,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1220426388] [2022-07-22 11:06:12,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1220426388] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:06:12,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:06:12,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-07-22 11:06:12,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335304198] [2022-07-22 11:06:12,131 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:06:12,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-22 11:06:12,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:06:12,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-22 11:06:12,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=2257, Unknown=0, NotChecked=0, Total=2652 [2022-07-22 11:06:12,131 INFO L87 Difference]: Start difference. First operand 550 states and 754 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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) [2022-07-22 11:06:29,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:06:29,745 INFO L93 Difference]: Finished difference Result 776 states and 1047 transitions. [2022-07-22 11:06:29,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-07-22 11:06:29,748 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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 30 [2022-07-22 11:06:29,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:06:29,751 INFO L225 Difference]: With dead ends: 776 [2022-07-22 11:06:29,751 INFO L226 Difference]: Without dead ends: 762 [2022-07-22 11:06:29,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7734 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=2487, Invalid=22635, Unknown=0, NotChecked=0, Total=25122 [2022-07-22 11:06:29,753 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 92 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:06:29,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 101 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1385 Invalid, 0 Unknown, 100 Unchecked, 1.5s Time] [2022-07-22 11:06:29,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-07-22 11:06:29,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 640. [2022-07-22 11:06:29,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 1.3708920187793427) internal successors, (876), 639 states have internal predecessors, (876), 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) [2022-07-22 11:06:29,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 876 transitions. [2022-07-22 11:06:29,934 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 876 transitions. Word has length 30 [2022-07-22 11:06:29,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:06:29,935 INFO L495 AbstractCegarLoop]: Abstraction has 640 states and 876 transitions. [2022-07-22 11:06:29,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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) [2022-07-22 11:06:29,935 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 876 transitions. [2022-07-22 11:06:29,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-22 11:06:29,936 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:06:29,936 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2022-07-22 11:06:29,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-22 11:06:30,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:06:30,150 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:06:30,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:06:30,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1120723122, now seen corresponding path program 8 times [2022-07-22 11:06:30,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:06:30,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [361180512] [2022-07-22 11:06:30,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 11:06:30,151 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:06:30,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:06:30,153 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:06:30,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-22 11:06:30,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 11:06:30,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:06:30,176 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-22 11:06:30,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:06:30,947 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:06:30,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:06:33,467 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:06:33,468 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:06:33,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [361180512] [2022-07-22 11:06:33,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [361180512] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:06:33,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:06:33,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-07-22 11:06:33,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376240684] [2022-07-22 11:06:33,468 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:06:33,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-22 11:06:33,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:06:33,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-22 11:06:33,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=2285, Unknown=0, NotChecked=0, Total=2652 [2022-07-22 11:06:33,469 INFO L87 Difference]: Start difference. First operand 640 states and 876 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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) [2022-07-22 11:07:02,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:07:02,177 INFO L93 Difference]: Finished difference Result 866 states and 1165 transitions. [2022-07-22 11:07:02,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-07-22 11:07:02,178 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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 30 [2022-07-22 11:07:02,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:07:02,180 INFO L225 Difference]: With dead ends: 866 [2022-07-22 11:07:02,180 INFO L226 Difference]: Without dead ends: 831 [2022-07-22 11:07:02,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10070 ImplicationChecksByTransitivity, 29.2s TimeCoverageRelationStatistics Valid=4419, Invalid=28161, Unknown=0, NotChecked=0, Total=32580 [2022-07-22 11:07:02,182 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 184 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 1661 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 2006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 1661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-22 11:07:02,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 174 Invalid, 2006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 1661 Invalid, 0 Unknown, 88 Unchecked, 1.8s Time] [2022-07-22 11:07:02,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-07-22 11:07:02,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 681. [2022-07-22 11:07:02,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 1.3691176470588236) internal successors, (931), 680 states have internal predecessors, (931), 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) [2022-07-22 11:07:02,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 931 transitions. [2022-07-22 11:07:02,353 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 931 transitions. Word has length 30 [2022-07-22 11:07:02,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:07:02,353 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 931 transitions. [2022-07-22 11:07:02,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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) [2022-07-22 11:07:02,353 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 931 transitions. [2022-07-22 11:07:02,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-22 11:07:02,354 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:07:02,354 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2022-07-22 11:07:02,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-22 11:07:02,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:07:02,565 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:07:02,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:07:02,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1378888560, now seen corresponding path program 9 times [2022-07-22 11:07:02,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:07:02,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1537449420] [2022-07-22 11:07:02,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 11:07:02,566 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:07:02,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:07:02,567 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:07:02,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-22 11:07:02,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-22 11:07:02,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:07:02,605 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-22 11:07:02,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:07:04,014 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 3 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:07:04,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:07:07,297 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:07:07,297 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:07:07,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1537449420] [2022-07-22 11:07:07,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1537449420] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:07:07,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:07:07,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2022-07-22 11:07:07,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927367049] [2022-07-22 11:07:07,298 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:07:07,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-22 11:07:07,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:07:07,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-22 11:07:07,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=2401, Unknown=0, NotChecked=0, Total=2862 [2022-07-22 11:07:07,298 INFO L87 Difference]: Start difference. First operand 681 states and 931 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 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) [2022-07-22 11:07:14,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:07:14,354 INFO L93 Difference]: Finished difference Result 1022 states and 1381 transitions. [2022-07-22 11:07:14,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-07-22 11:07:14,355 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 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 30 [2022-07-22 11:07:14,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:07:14,358 INFO L225 Difference]: With dead ends: 1022 [2022-07-22 11:07:14,358 INFO L226 Difference]: Without dead ends: 1016 [2022-07-22 11:07:14,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2844 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=1687, Invalid=9025, Unknown=0, NotChecked=0, Total=10712 [2022-07-22 11:07:14,359 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 59 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 306 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:07:14,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 67 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 159 Invalid, 0 Unknown, 306 Unchecked, 0.2s Time] [2022-07-22 11:07:14,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2022-07-22 11:07:14,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 866. [2022-07-22 11:07:14,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 1.3745664739884393) internal successors, (1189), 865 states have internal predecessors, (1189), 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) [2022-07-22 11:07:14,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1189 transitions. [2022-07-22 11:07:14,583 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1189 transitions. Word has length 30 [2022-07-22 11:07:14,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:07:14,584 INFO L495 AbstractCegarLoop]: Abstraction has 866 states and 1189 transitions. [2022-07-22 11:07:14,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 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) [2022-07-22 11:07:14,584 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1189 transitions. [2022-07-22 11:07:14,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-22 11:07:14,585 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:07:14,585 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1] [2022-07-22 11:07:14,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-22 11:07:14,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:07:14,794 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:07:14,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:07:14,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1436146862, now seen corresponding path program 10 times [2022-07-22 11:07:14,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:07:14,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [858846639] [2022-07-22 11:07:14,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 11:07:14,794 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:07:14,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:07:14,795 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:07:14,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-22 11:07:14,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 11:07:14,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:07:14,817 WARN L261 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-22 11:07:14,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:07:15,613 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:07:15,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:07:18,261 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 11:07:18,262 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:07:18,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [858846639] [2022-07-22 11:07:18,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [858846639] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:07:18,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:07:18,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-07-22 11:07:18,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144724897] [2022-07-22 11:07:18,262 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:07:18,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-22 11:07:18,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:07:18,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-22 11:07:18,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=2263, Unknown=0, NotChecked=0, Total=2652 [2022-07-22 11:07:18,263 INFO L87 Difference]: Start difference. First operand 866 states and 1189 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 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)