./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 3a877d22 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 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 08:55:42,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 08:55:42,839 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 08:55:42,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 08:55:42,877 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 08:55:42,880 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 08:55:42,881 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 08:55:42,883 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 08:55:42,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 08:55:42,888 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 08:55:42,888 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 08:55:42,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 08:55:42,890 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 08:55:42,892 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 08:55:42,893 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 08:55:42,898 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 08:55:42,900 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 08:55:42,900 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 08:55:42,902 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 08:55:42,906 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 08:55:42,907 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 08:55:42,908 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 08:55:42,909 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 08:55:42,910 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 08:55:42,914 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 08:55:42,915 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 08:55:42,915 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 08:55:42,916 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 08:55:42,916 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 08:55:42,917 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 08:55:42,917 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 08:55:42,918 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 08:55:42,919 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 08:55:42,920 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 08:55:42,921 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 08:55:42,921 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 08:55:42,922 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 08:55:42,922 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 08:55:42,922 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 08:55:42,923 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 08:55:42,924 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 08:55:42,925 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 08:55:42,950 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 08:55:42,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 08:55:42,951 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 08:55:42,951 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 08:55:42,952 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 08:55:42,952 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 08:55:42,953 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 08:55:42,953 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 08:55:42,953 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 08:55:42,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 08:55:42,954 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 08:55:42,954 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 08:55:42,954 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 08:55:42,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 08:55:42,955 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 08:55:42,955 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 08:55:42,955 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 08:55:42,955 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 08:55:42,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 08:55:42,956 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 08:55:42,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 08:55:42,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 08:55:42,956 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 08:55:42,956 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 08:55:42,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:55:42,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 08:55:42,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 08:55:42,957 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 08:55:42,957 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 08:55:42,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 08:55:42,958 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 08:55:42,958 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 08:55:42,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 08:55:42,958 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 08:55:42,958 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 [2021-12-15 08:55:43,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 08:55:43,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 08:55:43,195 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 08:55:43,196 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 08:55:43,208 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 08:55:43,209 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/num_conversion_2.c [2021-12-15 08:55:43,262 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46425e597/fff62d5485e94de98324788d9c52ffff/FLAGcbb89318e [2021-12-15 08:55:43,599 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 08:55:43,600 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/num_conversion_2.c [2021-12-15 08:55:43,604 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46425e597/fff62d5485e94de98324788d9c52ffff/FLAGcbb89318e [2021-12-15 08:55:43,617 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46425e597/fff62d5485e94de98324788d9c52ffff [2021-12-15 08:55:43,619 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 08:55:43,620 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 08:55:43,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 08:55:43,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 08:55:43,625 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 08:55:43,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:55:43" (1/1) ... [2021-12-15 08:55:43,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3af36a6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:43, skipping insertion in model container [2021-12-15 08:55:43,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:55:43" (1/1) ... [2021-12-15 08:55:43,632 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 08:55:43,642 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 08:55:43,775 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] [2021-12-15 08:55:43,789 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:55:43,794 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 08:55:43,803 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] [2021-12-15 08:55:43,807 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:55:43,817 INFO L208 MainTranslator]: Completed translation [2021-12-15 08:55:43,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:43 WrapperNode [2021-12-15 08:55:43,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 08:55:43,818 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 08:55:43,818 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 08:55:43,819 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 08:55:43,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:43" (1/1) ... [2021-12-15 08:55:43,827 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:43" (1/1) ... [2021-12-15 08:55:43,839 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2021-12-15 08:55:43,840 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 08:55:43,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 08:55:43,840 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 08:55:43,841 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 08:55:43,845 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:43" (1/1) ... [2021-12-15 08:55:43,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:43" (1/1) ... [2021-12-15 08:55:43,847 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:43" (1/1) ... [2021-12-15 08:55:43,848 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:43" (1/1) ... [2021-12-15 08:55:43,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:43" (1/1) ... [2021-12-15 08:55:43,857 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:43" (1/1) ... [2021-12-15 08:55:43,858 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:43" (1/1) ... [2021-12-15 08:55:43,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 08:55:43,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 08:55:43,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 08:55:43,864 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 08:55:43,865 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:43" (1/1) ... [2021-12-15 08:55:43,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:55:43,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:55:43,896 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 08:55:43,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 08:55:43,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 08:55:43,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 08:55:43,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 08:55:43,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 08:55:43,965 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 08:55:43,966 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 08:55:44,059 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 08:55:44,063 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 08:55:44,063 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 08:55:44,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:55:44 BoogieIcfgContainer [2021-12-15 08:55:44,064 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 08:55:44,065 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 08:55:44,065 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 08:55:44,068 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 08:55:44,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 08:55:43" (1/3) ... [2021-12-15 08:55:44,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48bd1bb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:55:44, skipping insertion in model container [2021-12-15 08:55:44,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:43" (2/3) ... [2021-12-15 08:55:44,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48bd1bb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:55:44, skipping insertion in model container [2021-12-15 08:55:44,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:55:44" (3/3) ... [2021-12-15 08:55:44,071 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_2.c [2021-12-15 08:55:44,075 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 08:55:44,075 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 08:55:44,114 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 08:55:44,120 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 08:55:44,120 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 08:55:44,131 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) [2021-12-15 08:55:44,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 08:55:44,135 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:55:44,135 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 08:55:44,136 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:55:44,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:55:44,140 INFO L85 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2021-12-15 08:55:44,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:55:44,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390622836] [2021-12-15 08:55:44,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:55:44,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:55:44,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:55:44,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:55:44,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:55:44,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390622836] [2021-12-15 08:55:44,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390622836] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:55:44,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:55:44,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 08:55:44,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336177225] [2021-12-15 08:55:44,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:55:44,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 08:55:44,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:55:44,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 08:55:44,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 08:55:44,254 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) [2021-12-15 08:55:44,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:55:44,263 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-12-15 08:55:44,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 08:55:44,264 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 [2021-12-15 08:55:44,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:55:44,269 INFO L225 Difference]: With dead ends: 21 [2021-12-15 08:55:44,269 INFO L226 Difference]: Without dead ends: 9 [2021-12-15 08:55:44,271 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:55:44,273 INFO L933 BasicCegarLoop]: 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 [2021-12-15 08:55:44,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:55:44,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-12-15 08:55:44,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-12-15 08:55:44,320 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) [2021-12-15 08:55:44,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-12-15 08:55:44,322 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-12-15 08:55:44,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:55:44,322 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-12-15 08:55:44,322 INFO L471 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) [2021-12-15 08:55:44,322 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-12-15 08:55:44,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 08:55:44,323 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:55:44,323 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 08:55:44,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 08:55:44,324 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:55:44,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:55:44,324 INFO L85 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2021-12-15 08:55:44,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:55:44,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509566956] [2021-12-15 08:55:44,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:55:44,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:55:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:55:44,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:55:44,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:55:44,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509566956] [2021-12-15 08:55:44,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509566956] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:55:44,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:55:44,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 08:55:44,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274116599] [2021-12-15 08:55:44,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:55:44,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 08:55:44,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:55:44,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 08:55:44,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:55:44,390 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) [2021-12-15 08:55:44,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:55:44,399 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-12-15 08:55:44,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 08:55:44,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-15 08:55:44,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:55:44,400 INFO L225 Difference]: With dead ends: 16 [2021-12-15 08:55:44,400 INFO L226 Difference]: Without dead ends: 12 [2021-12-15 08:55:44,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:55:44,402 INFO L933 BasicCegarLoop]: 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 [2021-12-15 08:55:44,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:55:44,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-12-15 08:55:44,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2021-12-15 08:55:44,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:44,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-12-15 08:55:44,418 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-12-15 08:55:44,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:55:44,419 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-12-15 08:55:44,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:44,419 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-12-15 08:55:44,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-15 08:55:44,419 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:55:44,420 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:55:44,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 08:55:44,420 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:55:44,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:55:44,421 INFO L85 PathProgramCache]: Analyzing trace with hash 641725625, now seen corresponding path program 1 times [2021-12-15 08:55:44,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:55:44,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075120342] [2021-12-15 08:55:44,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:55:44,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:55:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:55:44,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:55:44,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:55:44,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075120342] [2021-12-15 08:55:44,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075120342] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:55:44,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829009142] [2021-12-15 08:55:44,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:55:44,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:55:44,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:55:44,500 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:55:44,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 08:55:44,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:55:44,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 08:55:44,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:55:44,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:55:44,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:55:44,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:55:44,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829009142] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:55:44,676 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:55:44,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 8 [2021-12-15 08:55:44,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110697180] [2021-12-15 08:55:44,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:55:44,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 08:55:44,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:55:44,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 08:55:44,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-15 08:55:44,678 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) [2021-12-15 08:55:44,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:55:44,725 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2021-12-15 08:55:44,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 08:55:44,726 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 [2021-12-15 08:55:44,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:55:44,727 INFO L225 Difference]: With dead ends: 23 [2021-12-15 08:55:44,728 INFO L226 Difference]: Without dead ends: 19 [2021-12-15 08:55:44,729 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:55:44,732 INFO L933 BasicCegarLoop]: 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 [2021-12-15 08:55:44,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 29 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:55:44,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-15 08:55:44,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-12-15 08:55:44,735 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) [2021-12-15 08:55:44,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-12-15 08:55:44,735 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2021-12-15 08:55:44,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:55:44,736 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-12-15 08:55:44,736 INFO L471 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) [2021-12-15 08:55:44,736 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-12-15 08:55:44,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-15 08:55:44,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:55:44,737 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-15 08:55:44,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 08:55:44,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:55:44,945 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:55:44,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:55:44,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1171899538, now seen corresponding path program 2 times [2021-12-15 08:55:44,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:55:44,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205214661] [2021-12-15 08:55:44,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:55:44,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:55:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:55:45,035 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:55:45,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:55:45,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205214661] [2021-12-15 08:55:45,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205214661] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:55:45,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613327577] [2021-12-15 08:55:45,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 08:55:45,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:55:45,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:55:45,037 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:55:45,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 08:55:45,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 08:55:45,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:55:45,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-15 08:55:45,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:55:45,158 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:55:45,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:55:45,312 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:55:45,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613327577] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:55:45,313 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:55:45,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 17 [2021-12-15 08:55:45,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785354859] [2021-12-15 08:55:45,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:55:45,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-15 08:55:45,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:55:45,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-15 08:55:45,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-12-15 08:55:45,315 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) [2021-12-15 08:55:45,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:55:45,433 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2021-12-15 08:55:45,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 08:55:45,436 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 [2021-12-15 08:55:45,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:55:45,437 INFO L225 Difference]: With dead ends: 35 [2021-12-15 08:55:45,437 INFO L226 Difference]: Without dead ends: 31 [2021-12-15 08:55:45,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-12-15 08:55:45,438 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 56 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:55:45,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 98 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:55:45,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-15 08:55:45,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-15 08:55:45,442 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) [2021-12-15 08:55:45,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2021-12-15 08:55:45,442 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 18 [2021-12-15 08:55:45,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:55:45,443 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2021-12-15 08:55:45,443 INFO L471 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) [2021-12-15 08:55:45,443 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2021-12-15 08:55:45,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-15 08:55:45,443 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:55:45,444 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-12-15 08:55:45,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 08:55:45,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-15 08:55:45,657 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:55:45,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:55:45,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1720528430, now seen corresponding path program 3 times [2021-12-15 08:55:45,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:55:45,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684793840] [2021-12-15 08:55:45,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:55:45,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:55:45,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 08:55:45,684 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-15 08:55:45,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 08:55:45,715 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-15 08:55:45,716 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-15 08:55:45,716 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-15 08:55:45,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 08:55:45,720 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2021-12-15 08:55:45,721 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-15 08:55:45,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 08:55:45 BoogieIcfgContainer [2021-12-15 08:55:45,749 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-15 08:55:45,752 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-15 08:55:45,756 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-15 08:55:45,756 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-15 08:55:45,757 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:55:44" (3/4) ... [2021-12-15 08:55:45,758 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-15 08:55:45,759 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-15 08:55:45,760 INFO L158 Benchmark]: Toolchain (without parser) took 2139.41ms. Allocated memory was 102.8MB in the beginning and 132.1MB in the end (delta: 29.4MB). Free memory was 75.0MB in the beginning and 90.5MB in the end (delta: -15.6MB). Peak memory consumption was 14.2MB. Max. memory is 16.1GB. [2021-12-15 08:55:45,760 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 102.8MB. Free memory was 60.2MB in the beginning and 60.1MB in the end (delta: 41.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 08:55:45,760 INFO L158 Benchmark]: CACSL2BoogieTranslator took 195.03ms. Allocated memory is still 102.8MB. Free memory was 74.7MB in the beginning and 80.0MB in the end (delta: -5.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-15 08:55:45,761 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.29ms. Allocated memory is still 102.8MB. Free memory was 80.0MB in the beginning and 78.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 08:55:45,763 INFO L158 Benchmark]: Boogie Preprocessor took 22.73ms. Allocated memory is still 102.8MB. Free memory was 78.7MB in the beginning and 77.6MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 08:55:45,763 INFO L158 Benchmark]: RCFGBuilder took 200.63ms. Allocated memory is still 102.8MB. Free memory was 77.6MB in the beginning and 69.0MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-15 08:55:45,763 INFO L158 Benchmark]: TraceAbstraction took 1684.16ms. Allocated memory was 102.8MB in the beginning and 132.1MB in the end (delta: 29.4MB). Free memory was 68.6MB in the beginning and 90.5MB in the end (delta: -21.9MB). Peak memory consumption was 9.1MB. Max. memory is 16.1GB. [2021-12-15 08:55:45,764 INFO L158 Benchmark]: Witness Printer took 7.12ms. Allocated memory is still 132.1MB. Free memory is still 90.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 08:55:45,765 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 102.8MB. Free memory was 60.2MB in the beginning and 60.1MB in the end (delta: 41.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 195.03ms. Allocated memory is still 102.8MB. Free memory was 74.7MB in the beginning and 80.0MB in the end (delta: -5.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.29ms. Allocated memory is still 102.8MB. Free memory was 80.0MB in the beginning and 78.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.73ms. Allocated memory is still 102.8MB. Free memory was 78.7MB in the beginning and 77.6MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 200.63ms. Allocated memory is still 102.8MB. Free memory was 77.6MB in the beginning and 69.0MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 1684.16ms. Allocated memory was 102.8MB in the beginning and 132.1MB in the end (delta: 29.4MB). Free memory was 68.6MB in the beginning and 90.5MB in the end (delta: -21.9MB). Peak memory consumption was 9.1MB. Max. memory is 16.1GB. * Witness Printer took 7.12ms. Allocated memory is still 132.1MB. Free memory is still 90.5MB. 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 [c=0, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=0, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=1, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=1, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=1, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=2, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=2, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=2, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=3, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=3, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=3, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=4, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=4, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=4, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=5, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=5, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=5, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=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 [c=6, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=6, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=7, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=7, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=7, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=8, y=0] [L30] COND FALSE !(c < (unsigned char)8) VAL [bit=0, c=8, 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: 1.6s, OverallIterations: 5, TraceHistogramMax: 8, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 86 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 86 mSDsluCounter, 155 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 107 mSDsCounter, 21 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 99 IncrementalHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 21 mSolverCounterUnsat, 48 mSDtfsCounter, 99 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 70 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=4, InterpolantAutomatonStates: 23, 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, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 96 NumberOfCodeBlocks, 96 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 85 ConstructedInterpolants, 0 QuantifiedInterpolants, 499 SizeOfPredicates, 4 NumberOfNonLiveVariables, 99 ConjunctsInSsa, 23 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 [2021-12-15 08:55:45,796 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 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 08:55:47,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 08:55:47,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 08:55:47,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 08:55:47,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 08:55:47,439 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 08:55:47,440 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 08:55:47,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 08:55:47,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 08:55:47,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 08:55:47,450 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 08:55:47,451 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 08:55:47,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 08:55:47,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 08:55:47,455 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 08:55:47,458 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 08:55:47,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 08:55:47,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 08:55:47,463 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 08:55:47,467 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 08:55:47,468 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 08:55:47,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 08:55:47,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 08:55:47,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 08:55:47,476 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 08:55:47,476 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 08:55:47,477 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 08:55:47,478 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 08:55:47,478 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 08:55:47,479 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 08:55:47,479 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 08:55:47,479 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 08:55:47,481 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 08:55:47,481 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 08:55:47,482 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 08:55:47,482 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 08:55:47,483 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 08:55:47,483 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 08:55:47,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 08:55:47,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 08:55:47,485 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 08:55:47,488 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-15 08:55:47,516 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 08:55:47,516 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 08:55:47,517 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 08:55:47,517 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 08:55:47,518 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 08:55:47,518 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 08:55:47,519 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 08:55:47,519 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 08:55:47,519 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 08:55:47,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 08:55:47,520 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 08:55:47,520 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 08:55:47,520 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 08:55:47,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 08:55:47,521 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 08:55:47,521 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 08:55:47,521 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 08:55:47,521 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-15 08:55:47,521 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-15 08:55:47,521 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 08:55:47,526 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 08:55:47,526 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 08:55:47,527 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 08:55:47,527 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 08:55:47,527 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 08:55:47,527 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 08:55:47,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:55:47,527 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 08:55:47,528 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 08:55:47,528 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 08:55:47,528 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-15 08:55:47,528 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-15 08:55:47,528 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 08:55:47,528 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 08:55:47,528 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 08:55:47,529 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 08:55:47,529 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-15 08:55:47,529 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 [2021-12-15 08:55:47,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 08:55:47,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 08:55:47,822 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 08:55:47,823 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 08:55:47,824 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 08:55:47,825 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/num_conversion_2.c [2021-12-15 08:55:47,878 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc2b8f05d/9d00838266a24e44a19d768a26d91c83/FLAGfe4dc99e2 [2021-12-15 08:55:48,298 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 08:55:48,298 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/num_conversion_2.c [2021-12-15 08:55:48,303 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc2b8f05d/9d00838266a24e44a19d768a26d91c83/FLAGfe4dc99e2 [2021-12-15 08:55:48,314 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc2b8f05d/9d00838266a24e44a19d768a26d91c83 [2021-12-15 08:55:48,316 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 08:55:48,317 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 08:55:48,319 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 08:55:48,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 08:55:48,322 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 08:55:48,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:55:48" (1/1) ... [2021-12-15 08:55:48,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ed1a47d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:48, skipping insertion in model container [2021-12-15 08:55:48,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:55:48" (1/1) ... [2021-12-15 08:55:48,329 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 08:55:48,339 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 08:55:48,455 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] [2021-12-15 08:55:48,471 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:55:48,478 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 08:55:48,487 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] [2021-12-15 08:55:48,492 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:55:48,529 INFO L208 MainTranslator]: Completed translation [2021-12-15 08:55:48,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:48 WrapperNode [2021-12-15 08:55:48,530 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 08:55:48,531 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 08:55:48,531 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 08:55:48,531 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 08:55:48,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:48" (1/1) ... [2021-12-15 08:55:48,541 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:48" (1/1) ... [2021-12-15 08:55:48,552 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2021-12-15 08:55:48,552 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 08:55:48,553 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 08:55:48,553 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 08:55:48,554 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 08:55:48,559 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:48" (1/1) ... [2021-12-15 08:55:48,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:48" (1/1) ... [2021-12-15 08:55:48,567 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:48" (1/1) ... [2021-12-15 08:55:48,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:48" (1/1) ... [2021-12-15 08:55:48,578 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:48" (1/1) ... [2021-12-15 08:55:48,580 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:48" (1/1) ... [2021-12-15 08:55:48,582 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:48" (1/1) ... [2021-12-15 08:55:48,584 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 08:55:48,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 08:55:48,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 08:55:48,586 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 08:55:48,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:48" (1/1) ... [2021-12-15 08:55:48,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:55:48,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:55:48,606 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 08:55:48,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 08:55:48,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 08:55:48,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 08:55:48,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 08:55:48,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-15 08:55:48,677 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 08:55:48,678 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 08:55:48,742 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 08:55:48,746 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 08:55:48,746 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 08:55:48,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:55:48 BoogieIcfgContainer [2021-12-15 08:55:48,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 08:55:48,749 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 08:55:48,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 08:55:48,750 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 08:55:48,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 08:55:48" (1/3) ... [2021-12-15 08:55:48,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53997ba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:55:48, skipping insertion in model container [2021-12-15 08:55:48,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:48" (2/3) ... [2021-12-15 08:55:48,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53997ba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:55:48, skipping insertion in model container [2021-12-15 08:55:48,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:55:48" (3/3) ... [2021-12-15 08:55:48,753 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_2.c [2021-12-15 08:55:48,756 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 08:55:48,756 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 08:55:48,782 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 08:55:48,786 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 08:55:48,787 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 08:55:48,794 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) [2021-12-15 08:55:48,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 08:55:48,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:55:48,797 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 08:55:48,798 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:55:48,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:55:48,801 INFO L85 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2021-12-15 08:55:48,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 08:55:48,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1550373844] [2021-12-15 08:55:48,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:55:48,809 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 08:55:48,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 08:55:48,811 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 08:55:48,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-15 08:55:48,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:55:48,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-15 08:55:48,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:55:48,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:55:48,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 08:55:48,887 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 08:55:48,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1550373844] [2021-12-15 08:55:48,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1550373844] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:55:48,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:55:48,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 08:55:48,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694395257] [2021-12-15 08:55:48,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:55:48,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 08:55:48,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 08:55:48,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 08:55:48,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 08:55:48,909 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) [2021-12-15 08:55:48,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:55:48,917 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-12-15 08:55:48,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 08:55:48,918 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 [2021-12-15 08:55:48,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:55:48,923 INFO L225 Difference]: With dead ends: 21 [2021-12-15 08:55:48,923 INFO L226 Difference]: Without dead ends: 9 [2021-12-15 08:55:48,925 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:55:48,927 INFO L933 BasicCegarLoop]: 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 [2021-12-15 08:55:48,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:55:48,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-12-15 08:55:48,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-12-15 08:55:48,944 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) [2021-12-15 08:55:48,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-12-15 08:55:48,945 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-12-15 08:55:48,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:55:48,946 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-12-15 08:55:48,946 INFO L471 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) [2021-12-15 08:55:48,946 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-12-15 08:55:48,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 08:55:48,947 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:55:48,947 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 08:55:48,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-15 08:55:49,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 08:55:49,156 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:55:49,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:55:49,157 INFO L85 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2021-12-15 08:55:49,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 08:55:49,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [138761441] [2021-12-15 08:55:49,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:55:49,157 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 08:55:49,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 08:55:49,159 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 08:55:49,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-15 08:55:49,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:55:49,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 08:55:49,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:55:49,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:55:49,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 08:55:49,213 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 08:55:49,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [138761441] [2021-12-15 08:55:49,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [138761441] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:55:49,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:55:49,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 08:55:49,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350355523] [2021-12-15 08:55:49,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:55:49,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 08:55:49,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 08:55:49,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 08:55:49,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:55:49,216 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) [2021-12-15 08:55:49,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:55:49,224 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-12-15 08:55:49,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 08:55:49,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-15 08:55:49,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:55:49,225 INFO L225 Difference]: With dead ends: 16 [2021-12-15 08:55:49,225 INFO L226 Difference]: Without dead ends: 12 [2021-12-15 08:55:49,226 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:55:49,227 INFO L933 BasicCegarLoop]: 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 [2021-12-15 08:55:49,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:55:49,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-12-15 08:55:49,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2021-12-15 08:55:49,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:49,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-12-15 08:55:49,230 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-12-15 08:55:49,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:55:49,231 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-12-15 08:55:49,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:49,231 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-12-15 08:55:49,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-15 08:55:49,231 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:55:49,232 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:55:49,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-15 08:55:49,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 08:55:49,440 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:55:49,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:55:49,440 INFO L85 PathProgramCache]: Analyzing trace with hash 641725625, now seen corresponding path program 1 times [2021-12-15 08:55:49,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 08:55:49,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1533163679] [2021-12-15 08:55:49,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:55:49,441 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 08:55:49,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 08:55:49,442 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 08:55:49,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-15 08:55:49,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:55:49,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 08:55:49,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:55:49,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:55:49,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:55:49,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:55:49,536 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 08:55:49,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1533163679] [2021-12-15 08:55:49,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1533163679] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:55:49,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 08:55:49,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-15 08:55:49,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426090837] [2021-12-15 08:55:49,537 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 08:55:49,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 08:55:49,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 08:55:49,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 08:55:49,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 08:55:49,538 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) [2021-12-15 08:55:49,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:55:49,572 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2021-12-15 08:55:49,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 08:55:49,573 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 [2021-12-15 08:55:49,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:55:49,574 INFO L225 Difference]: With dead ends: 23 [2021-12-15 08:55:49,574 INFO L226 Difference]: Without dead ends: 19 [2021-12-15 08:55:49,574 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:55:49,575 INFO L933 BasicCegarLoop]: 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 [2021-12-15 08:55:49,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 24 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:55:49,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-15 08:55:49,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-12-15 08:55:49,579 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) [2021-12-15 08:55:49,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-12-15 08:55:49,579 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2021-12-15 08:55:49,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:55:49,580 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-12-15 08:55:49,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:49,580 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-12-15 08:55:49,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-15 08:55:49,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:55:49,581 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-15 08:55:49,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-15 08:55:49,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 08:55:49,789 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:55:49,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:55:49,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1171899538, now seen corresponding path program 2 times [2021-12-15 08:55:49,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 08:55:49,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784741698] [2021-12-15 08:55:49,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 08:55:49,790 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 08:55:49,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 08:55:49,791 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 08:55:49,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-15 08:55:49,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 08:55:49,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:55:49,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 08:55:49,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:55:49,874 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:55:49,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:55:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:55:49,953 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 08:55:49,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784741698] [2021-12-15 08:55:49,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784741698] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:55:49,954 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 08:55:49,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-15 08:55:49,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789051323] [2021-12-15 08:55:49,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 08:55:49,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-15 08:55:49,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 08:55:49,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-15 08:55:49,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-12-15 08:55:49,956 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) [2021-12-15 08:55:50,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:55:50,027 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2021-12-15 08:55:50,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 08:55:50,028 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 [2021-12-15 08:55:50,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:55:50,029 INFO L225 Difference]: With dead ends: 35 [2021-12-15 08:55:50,029 INFO L226 Difference]: Without dead ends: 31 [2021-12-15 08:55:50,029 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:55:50,030 INFO L933 BasicCegarLoop]: 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, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:55:50,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 82 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:55:50,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-15 08:55:50,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-15 08:55:50,034 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) [2021-12-15 08:55:50,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2021-12-15 08:55:50,035 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 18 [2021-12-15 08:55:50,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:55:50,035 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2021-12-15 08:55:50,035 INFO L471 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) [2021-12-15 08:55:50,035 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2021-12-15 08:55:50,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-15 08:55:50,036 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:55:50,036 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-12-15 08:55:50,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-15 08:55:50,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 08:55:50,242 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:55:50,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:55:50,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1720528430, now seen corresponding path program 3 times [2021-12-15 08:55:50,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 08:55:50,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [513939421] [2021-12-15 08:55:50,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 08:55:50,243 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 08:55:50,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 08:55:50,244 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 08:55:50,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-15 08:55:50,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-15 08:55:50,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:55:50,278 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-15 08:55:50,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:55:52,435 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 40 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:55:52,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:55:55,146 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:55:55,146 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 08:55:55,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [513939421] [2021-12-15 08:55:55,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [513939421] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:55:55,147 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 08:55:55,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 53 [2021-12-15 08:55:55,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113857606] [2021-12-15 08:55:55,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 08:55:55,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-15 08:55:55,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 08:55:55,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-15 08:55:55,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=586, Invalid=2170, Unknown=0, NotChecked=0, Total=2756 [2021-12-15 08:55:55,150 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) [2021-12-15 08:55:59,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:55:59,652 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2021-12-15 08:55:59,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-15 08:55:59,653 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 [2021-12-15 08:55:59,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:55:59,654 INFO L225 Difference]: With dead ends: 96 [2021-12-15 08:55:59,654 INFO L226 Difference]: Without dead ends: 92 [2021-12-15 08:55:59,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2223 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=1669, Invalid=5813, Unknown=0, NotChecked=0, Total=7482 [2021-12-15 08:55:59,657 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 46 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2021-12-15 08:55:59,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 55 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 165 Invalid, 0 Unknown, 263 Unchecked, 0.2s Time] [2021-12-15 08:55:59,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-15 08:55:59,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 52. [2021-12-15 08:55:59,663 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) [2021-12-15 08:55:59,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2021-12-15 08:55:59,664 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 30 [2021-12-15 08:55:59,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:55:59,664 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2021-12-15 08:55:59,664 INFO L471 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) [2021-12-15 08:55:59,664 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2021-12-15 08:55:59,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-15 08:55:59,665 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:55:59,665 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:55:59,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-15 08:55:59,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 08:55:59,871 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:55:59,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:55:59,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1777786732, now seen corresponding path program 1 times [2021-12-15 08:55:59,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 08:55:59,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1087533217] [2021-12-15 08:55:59,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:55:59,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 08:55:59,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 08:55:59,873 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 08:55:59,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-15 08:55:59,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:55:59,893 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-15 08:55:59,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:56:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:56:00,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:56:03,268 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:56:03,269 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 08:56:03,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1087533217] [2021-12-15 08:56:03,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1087533217] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:56:03,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 08:56:03,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-15 08:56:03,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222360509] [2021-12-15 08:56:03,270 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 08:56:03,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-15 08:56:03,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 08:56:03,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-15 08:56:03,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=2240, Unknown=0, NotChecked=0, Total=2652 [2021-12-15 08:56:03,274 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) [2021-12-15 08:56:32,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:56:32,458 INFO L93 Difference]: Finished difference Result 319 states and 417 transitions. [2021-12-15 08:56:32,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2021-12-15 08:56:32,459 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 [2021-12-15 08:56:32,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:56:32,461 INFO L225 Difference]: With dead ends: 319 [2021-12-15 08:56:32,461 INFO L226 Difference]: Without dead ends: 285 [2021-12-15 08:56:32,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16710 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=7758, Invalid=41748, Unknown=0, NotChecked=0, Total=49506 [2021-12-15 08:56:32,471 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 277 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 1598 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 2.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:56:32,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 115 Invalid, 2274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 1598 Invalid, 0 Unknown, 136 Unchecked, 2.0s Time] [2021-12-15 08:56:32,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-12-15 08:56:32,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 160. [2021-12-15 08:56:32,486 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) [2021-12-15 08:56:32,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 217 transitions. [2021-12-15 08:56:32,488 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 217 transitions. Word has length 30 [2021-12-15 08:56:32,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:56:32,488 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 217 transitions. [2021-12-15 08:56:32,488 INFO L471 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) [2021-12-15 08:56:32,488 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 217 transitions. [2021-12-15 08:56:32,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-15 08:56:32,489 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:56:32,489 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:56:32,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-15 08:56:32,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 08:56:32,696 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:56:32,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:56:32,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1894380496, now seen corresponding path program 2 times [2021-12-15 08:56:32,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 08:56:32,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [55176297] [2021-12-15 08:56:32,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 08:56:32,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 08:56:32,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 08:56:32,698 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 08:56:32,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-15 08:56:32,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 08:56:32,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:56:32,722 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-15 08:56:32,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:56:33,582 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:56:33,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:56:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:56:35,997 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 08:56:35,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [55176297] [2021-12-15 08:56:35,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [55176297] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:56:35,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 08:56:35,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-15 08:56:35,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641805187] [2021-12-15 08:56:35,998 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 08:56:35,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-15 08:56:35,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 08:56:35,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-15 08:56:35,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=2283, Unknown=0, NotChecked=0, Total=2652 [2021-12-15 08:56:35,999 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)