./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-simple/deep-nested.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-simple/deep-nested.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 abddf9ff39262b7e56b56d5272c2d316261bfefbe98fc5849d87d962ab5f7694 --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 20:17:41,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 20:17:41,035 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 20:17:41,087 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 20:17:41,087 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 20:17:41,089 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 20:17:41,090 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 20:17:41,092 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 20:17:41,104 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 20:17:41,108 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 20:17:41,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 20:17:41,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 20:17:41,111 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 20:17:41,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 20:17:41,113 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 20:17:41,114 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 20:17:41,114 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 20:17:41,115 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 20:17:41,116 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 20:17:41,135 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 20:17:41,136 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 20:17:41,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 20:17:41,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 20:17:41,138 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 20:17:41,143 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 20:17:41,143 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 20:17:41,144 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 20:17:41,144 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 20:17:41,145 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 20:17:41,145 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 20:17:41,145 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 20:17:41,146 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 20:17:41,147 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 20:17:41,147 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 20:17:41,148 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 20:17:41,149 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 20:17:41,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 20:17:41,149 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 20:17:41,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 20:17:41,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 20:17:41,150 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 20:17:41,151 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 20:17:41,184 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 20:17:41,184 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 20:17:41,185 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 20:17:41,185 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 20:17:41,186 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 20:17:41,186 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 20:17:41,186 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 20:17:41,186 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 20:17:41,186 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 20:17:41,187 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 20:17:41,187 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 20:17:41,187 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 20:17:41,187 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 20:17:41,187 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 20:17:41,188 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 20:17:41,188 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 20:17:41,188 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 20:17:41,188 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 20:17:41,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 20:17:41,188 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 20:17:41,188 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 20:17:41,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 20:17:41,189 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 20:17:41,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 20:17:41,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 20:17:41,189 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 20:17:41,189 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 20:17:41,189 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 20:17:41,190 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 20:17:41,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 20:17:41,190 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 20:17:41,190 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 20:17:41,190 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 20:17:41,190 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 20:17:41,190 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 20:17:41,191 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> abddf9ff39262b7e56b56d5272c2d316261bfefbe98fc5849d87d962ab5f7694 [2023-02-15 20:17:41,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 20:17:41,539 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 20:17:41,541 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 20:17:41,542 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 20:17:41,542 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 20:17:41,543 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-simple/deep-nested.c [2023-02-15 20:17:42,595 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 20:17:42,784 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 20:17:42,785 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/deep-nested.c [2023-02-15 20:17:42,789 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8140a7bd0/489f9f2e16cb4b9392087b20ef604ec4/FLAGd7267f9de [2023-02-15 20:17:42,802 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8140a7bd0/489f9f2e16cb4b9392087b20ef604ec4 [2023-02-15 20:17:42,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 20:17:42,805 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 20:17:42,807 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 20:17:42,807 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 20:17:42,810 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 20:17:42,810 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 08:17:42" (1/1) ... [2023-02-15 20:17:42,811 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63bc651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:17:42, skipping insertion in model container [2023-02-15 20:17:42,811 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 08:17:42" (1/1) ... [2023-02-15 20:17:42,816 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 20:17:42,826 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 20:17:42,919 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/deep-nested.c[625,638] [2023-02-15 20:17:42,926 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 20:17:42,933 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 20:17:42,942 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/deep-nested.c[625,638] [2023-02-15 20:17:42,943 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 20:17:42,951 INFO L208 MainTranslator]: Completed translation [2023-02-15 20:17:42,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:17:42 WrapperNode [2023-02-15 20:17:42,952 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 20:17:42,953 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 20:17:42,953 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 20:17:42,953 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 20:17:42,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:17:42" (1/1) ... [2023-02-15 20:17:42,961 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:17:42" (1/1) ... [2023-02-15 20:17:42,977 INFO L138 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 61 [2023-02-15 20:17:42,977 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 20:17:42,978 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 20:17:42,978 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 20:17:42,978 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 20:17:42,984 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:17:42" (1/1) ... [2023-02-15 20:17:42,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:17:42" (1/1) ... [2023-02-15 20:17:42,985 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:17:42" (1/1) ... [2023-02-15 20:17:42,985 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:17:42" (1/1) ... [2023-02-15 20:17:42,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:17:42" (1/1) ... [2023-02-15 20:17:42,989 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:17:42" (1/1) ... [2023-02-15 20:17:42,989 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:17:42" (1/1) ... [2023-02-15 20:17:42,990 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:17:42" (1/1) ... [2023-02-15 20:17:42,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 20:17:42,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 20:17:42,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 20:17:42,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 20:17:42,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:17:42" (1/1) ... [2023-02-15 20:17:43,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 20:17:43,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:17:43,027 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) [2023-02-15 20:17:43,032 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 [2023-02-15 20:17:43,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 20:17:43,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 20:17:43,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 20:17:43,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 20:17:43,103 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 20:17:43,104 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 20:17:43,245 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 20:17:43,248 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 20:17:43,249 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2023-02-15 20:17:43,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 08:17:43 BoogieIcfgContainer [2023-02-15 20:17:43,251 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 20:17:43,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 20:17:43,252 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 20:17:43,254 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 20:17:43,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 08:17:42" (1/3) ... [2023-02-15 20:17:43,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6887141c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 08:17:43, skipping insertion in model container [2023-02-15 20:17:43,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:17:42" (2/3) ... [2023-02-15 20:17:43,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6887141c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 08:17:43, skipping insertion in model container [2023-02-15 20:17:43,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 08:17:43" (3/3) ... [2023-02-15 20:17:43,256 INFO L112 eAbstractionObserver]: Analyzing ICFG deep-nested.c [2023-02-15 20:17:43,267 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 20:17:43,268 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 20:17:43,309 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 20:17:43,313 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2464a0d5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 20:17:43,314 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 20:17:43,317 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:43,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-15 20:17:43,321 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:17:43,321 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:17:43,322 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:17:43,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:17:43,326 INFO L85 PathProgramCache]: Analyzing trace with hash -180366952, now seen corresponding path program 1 times [2023-02-15 20:17:43,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:17:43,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423054495] [2023-02-15 20:17:43,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:17:43,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:17:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:17:43,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:17:43,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:17:43,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423054495] [2023-02-15 20:17:43,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423054495] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:17:43,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:17:43,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 20:17:43,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296532289] [2023-02-15 20:17:43,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:17:43,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 20:17:43,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:17:43,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 20:17:43,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 20:17:43,618 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:43,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:17:43,690 INFO L93 Difference]: Finished difference Result 39 states and 62 transitions. [2023-02-15 20:17:43,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 20:17:43,692 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-15 20:17:43,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:17:43,696 INFO L225 Difference]: With dead ends: 39 [2023-02-15 20:17:43,697 INFO L226 Difference]: Without dead ends: 18 [2023-02-15 20:17:43,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 20:17:43,701 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:17:43,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 20 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:17:43,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-02-15 20:17:43,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2023-02-15 20:17:43,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 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) [2023-02-15 20:17:43,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-02-15 20:17:43,722 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2023-02-15 20:17:43,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:17:43,722 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-02-15 20:17:43,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:43,723 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-02-15 20:17:43,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 20:17:43,723 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:17:43,723 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:17:43,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 20:17:43,724 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:17:43,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:17:43,724 INFO L85 PathProgramCache]: Analyzing trace with hash -303894894, now seen corresponding path program 1 times [2023-02-15 20:17:43,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:17:43,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392169095] [2023-02-15 20:17:43,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:17:43,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:17:43,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:17:43,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:17:43,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:17:43,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392169095] [2023-02-15 20:17:43,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392169095] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:17:43,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207301954] [2023-02-15 20:17:43,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:17:43,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:17:43,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:17:43,904 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) [2023-02-15 20:17:43,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 20:17:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:17:43,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-15 20:17:43,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:17:44,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:17:44,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:17:44,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:17:44,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207301954] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:17:44,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:17:44,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-02-15 20:17:44,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120295928] [2023-02-15 20:17:44,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:17:44,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 20:17:44,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:17:44,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 20:17:44,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-02-15 20:17:44,249 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2023-02-15 20:17:44,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:17:44,703 INFO L93 Difference]: Finished difference Result 80 states and 108 transitions. [2023-02-15 20:17:44,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 20:17:44,703 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 12 [2023-02-15 20:17:44,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:17:44,704 INFO L225 Difference]: With dead ends: 80 [2023-02-15 20:17:44,704 INFO L226 Difference]: Without dead ends: 78 [2023-02-15 20:17:44,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-02-15 20:17:44,705 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 120 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:17:44,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 37 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 20:17:44,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-02-15 20:17:44,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 36. [2023-02-15 20:17:44,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 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) [2023-02-15 20:17:44,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2023-02-15 20:17:44,721 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 12 [2023-02-15 20:17:44,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:17:44,725 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2023-02-15 20:17:44,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2023-02-15 20:17:44,725 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2023-02-15 20:17:44,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-15 20:17:44,727 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:17:44,727 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:17:44,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 20:17:44,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:17:44,933 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:17:44,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:17:44,934 INFO L85 PathProgramCache]: Analyzing trace with hash -300219110, now seen corresponding path program 1 times [2023-02-15 20:17:44,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:17:44,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997334424] [2023-02-15 20:17:44,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:17:44,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:17:44,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:17:45,174 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-15 20:17:45,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:17:45,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997334424] [2023-02-15 20:17:45,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997334424] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:17:45,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55675936] [2023-02-15 20:17:45,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:17:45,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:17:45,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:17:45,193 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) [2023-02-15 20:17:45,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 20:17:45,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:17:45,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 20:17:45,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:17:45,270 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-15 20:17:45,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:17:45,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55675936] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:17:45,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:17:45,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-02-15 20:17:45,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893777416] [2023-02-15 20:17:45,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:17:45,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 20:17:45,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:17:45,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 20:17:45,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-15 20:17:45,274 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2023-02-15 20:17:45,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:17:45,338 INFO L93 Difference]: Finished difference Result 91 states and 120 transitions. [2023-02-15 20:17:45,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 20:17:45,338 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 24 [2023-02-15 20:17:45,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:17:45,339 INFO L225 Difference]: With dead ends: 91 [2023-02-15 20:17:45,339 INFO L226 Difference]: Without dead ends: 68 [2023-02-15 20:17:45,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-02-15 20:17:45,340 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 50 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:17:45,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 18 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:17:45,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-02-15 20:17:45,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 38. [2023-02-15 20:17:45,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 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) [2023-02-15 20:17:45,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2023-02-15 20:17:45,350 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 24 [2023-02-15 20:17:45,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:17:45,350 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2023-02-15 20:17:45,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2023-02-15 20:17:45,350 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2023-02-15 20:17:45,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 20:17:45,351 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:17:45,351 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:17:45,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 20:17:45,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-15 20:17:45,556 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:17:45,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:17:45,557 INFO L85 PathProgramCache]: Analyzing trace with hash 2053128687, now seen corresponding path program 1 times [2023-02-15 20:17:45,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:17:45,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239876206] [2023-02-15 20:17:45,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:17:45,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:17:45,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:17:45,720 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 20:17:45,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:17:45,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239876206] [2023-02-15 20:17:45,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239876206] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:17:45,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016173011] [2023-02-15 20:17:45,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:17:45,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:17:45,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:17:45,747 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:17:45,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 20:17:45,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:17:45,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 20:17:45,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:17:45,810 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 20:17:45,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:17:45,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016173011] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:17:45,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:17:45,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-02-15 20:17:45,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271127647] [2023-02-15 20:17:45,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:17:45,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 20:17:45,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:17:45,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 20:17:45,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-15 20:17:45,813 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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) [2023-02-15 20:17:45,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:17:45,884 INFO L93 Difference]: Finished difference Result 100 states and 131 transitions. [2023-02-15 20:17:45,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:17:45,886 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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 27 [2023-02-15 20:17:45,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:17:45,888 INFO L225 Difference]: With dead ends: 100 [2023-02-15 20:17:45,888 INFO L226 Difference]: Without dead ends: 66 [2023-02-15 20:17:45,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-02-15 20:17:45,890 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 90 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:17:45,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 16 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:17:45,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-02-15 20:17:45,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 40. [2023-02-15 20:17:45,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 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) [2023-02-15 20:17:45,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2023-02-15 20:17:45,907 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 27 [2023-02-15 20:17:45,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:17:45,907 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2023-02-15 20:17:45,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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) [2023-02-15 20:17:45,908 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2023-02-15 20:17:45,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 20:17:45,909 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:17:45,911 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:17:45,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 20:17:46,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:17:46,116 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:17:46,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:17:46,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1169919440, now seen corresponding path program 1 times [2023-02-15 20:17:46,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:17:46,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309333856] [2023-02-15 20:17:46,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:17:46,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:17:46,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:17:46,233 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-15 20:17:46,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:17:46,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309333856] [2023-02-15 20:17:46,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309333856] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:17:46,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007095813] [2023-02-15 20:17:46,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:17:46,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:17:46,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:17:46,248 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:17:46,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 20:17:46,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:17:46,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 20:17:46,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:17:46,336 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-15 20:17:46,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:17:46,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007095813] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:17:46,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:17:46,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-02-15 20:17:46,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314420525] [2023-02-15 20:17:46,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:17:46,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 20:17:46,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:17:46,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 20:17:46,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-15 20:17:46,338 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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) [2023-02-15 20:17:46,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:17:46,392 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2023-02-15 20:17:46,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:17:46,393 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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 [2023-02-15 20:17:46,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:17:46,393 INFO L225 Difference]: With dead ends: 84 [2023-02-15 20:17:46,393 INFO L226 Difference]: Without dead ends: 48 [2023-02-15 20:17:46,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-02-15 20:17:46,394 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 69 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:17:46,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 16 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:17:46,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-15 20:17:46,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2023-02-15 20:17:46,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 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) [2023-02-15 20:17:46,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2023-02-15 20:17:46,403 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 30 [2023-02-15 20:17:46,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:17:46,403 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2023-02-15 20:17:46,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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) [2023-02-15 20:17:46,404 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2023-02-15 20:17:46,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-15 20:17:46,404 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:17:46,404 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:17:46,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 20:17:46,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:17:46,609 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:17:46,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:17:46,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1349858359, now seen corresponding path program 2 times [2023-02-15 20:17:46,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:17:46,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581938905] [2023-02-15 20:17:46,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:17:46,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:17:46,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:17:46,810 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-15 20:17:46,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:17:46,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581938905] [2023-02-15 20:17:46,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581938905] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:17:46,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134481177] [2023-02-15 20:17:46,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:17:46,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:17:46,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:17:46,825 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:17:46,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 20:17:46,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-15 20:17:46,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:17:46,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 20:17:46,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:17:46,962 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-15 20:17:46,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:17:46,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134481177] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:17:46,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:17:46,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-02-15 20:17:46,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945698409] [2023-02-15 20:17:46,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:17:46,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 20:17:46,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:17:46,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 20:17:46,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-02-15 20:17:46,964 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2023-02-15 20:17:46,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:17:46,999 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2023-02-15 20:17:47,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 20:17:47,000 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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 36 [2023-02-15 20:17:47,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:17:47,000 INFO L225 Difference]: With dead ends: 67 [2023-02-15 20:17:47,001 INFO L226 Difference]: Without dead ends: 65 [2023-02-15 20:17:47,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-02-15 20:17:47,001 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:17:47,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 13 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:17:47,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-15 20:17:47,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 48. [2023-02-15 20:17:47,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 47 states have internal predecessors, (60), 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) [2023-02-15 20:17:47,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2023-02-15 20:17:47,012 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 36 [2023-02-15 20:17:47,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:17:47,013 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2023-02-15 20:17:47,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2023-02-15 20:17:47,013 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2023-02-15 20:17:47,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 20:17:47,013 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:17:47,014 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:17:47,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-15 20:17:47,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:17:47,219 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:17:47,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:17:47,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1511458419, now seen corresponding path program 3 times [2023-02-15 20:17:47,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:17:47,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271856455] [2023-02-15 20:17:47,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:17:47,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:17:47,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:17:47,413 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-15 20:17:47,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:17:47,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271856455] [2023-02-15 20:17:47,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271856455] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:17:47,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147769606] [2023-02-15 20:17:47,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:17:47,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:17:47,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:17:47,416 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:17:47,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 20:17:47,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-02-15 20:17:47,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:17:47,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 20:17:47,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:17:47,543 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-15 20:17:47,544 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:17:47,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147769606] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:17:47,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:17:47,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-02-15 20:17:47,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899023548] [2023-02-15 20:17:47,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:17:47,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 20:17:47,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:17:47,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 20:17:47,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-02-15 20:17:47,545 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:47,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:17:47,581 INFO L93 Difference]: Finished difference Result 87 states and 109 transitions. [2023-02-15 20:17:47,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 20:17:47,582 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-02-15 20:17:47,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:17:47,582 INFO L225 Difference]: With dead ends: 87 [2023-02-15 20:17:47,582 INFO L226 Difference]: Without dead ends: 85 [2023-02-15 20:17:47,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-02-15 20:17:47,583 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:17:47,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:17:47,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-02-15 20:17:47,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 58. [2023-02-15 20:17:47,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.280701754385965) internal successors, (73), 57 states have internal predecessors, (73), 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) [2023-02-15 20:17:47,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2023-02-15 20:17:47,612 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 45 [2023-02-15 20:17:47,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:17:47,612 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2023-02-15 20:17:47,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:47,613 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2023-02-15 20:17:47,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-15 20:17:47,616 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:17:47,616 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-15 20:17:47,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-15 20:17:47,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:17:47,820 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:17:47,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:17:47,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1257114416, now seen corresponding path program 4 times [2023-02-15 20:17:47,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:17:47,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119299658] [2023-02-15 20:17:47,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:17:47,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:17:47,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:17:48,062 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-02-15 20:17:48,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:17:48,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119299658] [2023-02-15 20:17:48,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119299658] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:17:48,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412406101] [2023-02-15 20:17:48,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:17:48,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:17:48,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:17:48,064 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:17:48,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 20:17:48,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:17:48,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:17:48,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 20:17:48,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:17:48,174 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-15 20:17:48,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:17:48,254 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 98 proven. 3 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-15 20:17:48,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412406101] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:17:48,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:17:48,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-02-15 20:17:48,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888178219] [2023-02-15 20:17:48,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:17:48,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 20:17:48,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:17:48,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 20:17:48,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-02-15 20:17:48,256 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 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) [2023-02-15 20:17:48,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:17:48,875 INFO L93 Difference]: Finished difference Result 233 states and 305 transitions. [2023-02-15 20:17:48,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 20:17:48,876 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 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 57 [2023-02-15 20:17:48,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:17:48,876 INFO L225 Difference]: With dead ends: 233 [2023-02-15 20:17:48,876 INFO L226 Difference]: Without dead ends: 125 [2023-02-15 20:17:48,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=245, Invalid=877, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 20:17:48,877 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 172 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:17:48,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 56 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:17:48,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-02-15 20:17:48,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 99. [2023-02-15 20:17:48,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.1938775510204083) internal successors, (117), 98 states have internal predecessors, (117), 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) [2023-02-15 20:17:48,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2023-02-15 20:17:48,897 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 57 [2023-02-15 20:17:48,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:17:48,897 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2023-02-15 20:17:48,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 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) [2023-02-15 20:17:48,897 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2023-02-15 20:17:48,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-02-15 20:17:48,897 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:17:48,897 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-15 20:17:48,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-15 20:17:49,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:17:49,102 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:17:49,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:17:49,102 INFO L85 PathProgramCache]: Analyzing trace with hash 722891500, now seen corresponding path program 5 times [2023-02-15 20:17:49,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:17:49,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554497627] [2023-02-15 20:17:49,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:17:49,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:17:49,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:17:49,509 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 16 proven. 141 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-02-15 20:17:49,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:17:49,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554497627] [2023-02-15 20:17:49,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554497627] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:17:49,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626327811] [2023-02-15 20:17:49,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 20:17:49,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:17:49,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:17:49,525 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:17:49,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 20:17:49,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-15 20:17:49,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:17:49,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 20:17:49,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:17:49,697 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 186 proven. 18 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2023-02-15 20:17:49,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:17:49,794 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 186 proven. 18 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2023-02-15 20:17:49,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626327811] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:17:49,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:17:49,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2023-02-15 20:17:49,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801993750] [2023-02-15 20:17:49,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:17:49,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 20:17:49,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:17:49,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 20:17:49,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2023-02-15 20:17:49,798 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 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) [2023-02-15 20:17:50,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:17:50,776 INFO L93 Difference]: Finished difference Result 530 states and 658 transitions. [2023-02-15 20:17:50,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-15 20:17:50,776 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 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 78 [2023-02-15 20:17:50,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:17:50,777 INFO L225 Difference]: With dead ends: 530 [2023-02-15 20:17:50,777 INFO L226 Difference]: Without dead ends: 330 [2023-02-15 20:17:50,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=335, Invalid=1471, Unknown=0, NotChecked=0, Total=1806 [2023-02-15 20:17:50,781 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 164 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 20:17:50,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 93 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 20:17:50,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2023-02-15 20:17:50,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 160. [2023-02-15 20:17:50,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.119496855345912) internal successors, (178), 159 states have internal predecessors, (178), 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) [2023-02-15 20:17:50,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 178 transitions. [2023-02-15 20:17:50,810 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 178 transitions. Word has length 78 [2023-02-15 20:17:50,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:17:50,810 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 178 transitions. [2023-02-15 20:17:50,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 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) [2023-02-15 20:17:50,811 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 178 transitions. [2023-02-15 20:17:50,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-02-15 20:17:50,815 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:17:50,815 INFO L195 NwaCegarLoop]: trace histogram [37, 36, 36, 9, 8, 8, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-15 20:17:50,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 20:17:51,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-02-15 20:17:51,020 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:17:51,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:17:51,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1550504784, now seen corresponding path program 6 times [2023-02-15 20:17:51,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:17:51,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056498718] [2023-02-15 20:17:51,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:17:51,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:17:51,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:17:51,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2406 backedges. 20 proven. 514 refuted. 0 times theorem prover too weak. 1872 trivial. 0 not checked. [2023-02-15 20:17:51,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:17:51,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056498718] [2023-02-15 20:17:51,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056498718] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:17:51,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855575589] [2023-02-15 20:17:51,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 20:17:51,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:17:51,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:17:51,562 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:17:51,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 20:17:51,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-02-15 20:17:51,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:17:51,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 20:17:51,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:17:51,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2406 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 1545 trivial. 0 not checked. [2023-02-15 20:17:51,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:17:52,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2406 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 1545 trivial. 0 not checked. [2023-02-15 20:17:52,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855575589] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:17:52,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:17:52,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4, 4] total 14 [2023-02-15 20:17:52,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678808298] [2023-02-15 20:17:52,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:17:52,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 20:17:52,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:17:52,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 20:17:52,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-02-15 20:17:52,266 INFO L87 Difference]: Start difference. First operand 160 states and 178 transitions. Second operand has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 14 states have internal predecessors, (97), 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) [2023-02-15 20:17:53,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:17:53,722 INFO L93 Difference]: Finished difference Result 903 states and 1043 transitions. [2023-02-15 20:17:53,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-15 20:17:53,722 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 14 states have internal predecessors, (97), 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 159 [2023-02-15 20:17:53,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:17:53,724 INFO L225 Difference]: With dead ends: 903 [2023-02-15 20:17:53,724 INFO L226 Difference]: Without dead ends: 688 [2023-02-15 20:17:53,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=466, Invalid=1696, Unknown=0, NotChecked=0, Total=2162 [2023-02-15 20:17:53,725 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 166 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 20:17:53,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 71 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 20:17:53,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2023-02-15 20:17:53,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 334. [2023-02-15 20:17:53,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 1.102102102102102) internal successors, (367), 333 states have internal predecessors, (367), 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) [2023-02-15 20:17:53,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 367 transitions. [2023-02-15 20:17:53,783 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 367 transitions. Word has length 159 [2023-02-15 20:17:53,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:17:53,783 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 367 transitions. [2023-02-15 20:17:53,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 14 states have internal predecessors, (97), 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) [2023-02-15 20:17:53,783 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 367 transitions. [2023-02-15 20:17:53,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2023-02-15 20:17:53,785 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:17:53,786 INFO L195 NwaCegarLoop]: trace histogram [80, 79, 79, 15, 14, 14, 7, 6, 6, 6, 5, 5, 5, 4, 4, 1, 1, 1, 1] [2023-02-15 20:17:53,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 20:17:53,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 20:17:53,991 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:17:53,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:17:53,992 INFO L85 PathProgramCache]: Analyzing trace with hash 78870797, now seen corresponding path program 7 times [2023-02-15 20:17:53,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:17:53,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625294912] [2023-02-15 20:17:53,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:17:53,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:17:54,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:17:55,022 INFO L134 CoverageAnalysis]: Checked inductivity of 11065 backedges. 44 proven. 1615 refuted. 0 times theorem prover too weak. 9406 trivial. 0 not checked. [2023-02-15 20:17:55,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:17:55,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625294912] [2023-02-15 20:17:55,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625294912] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:17:55,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417700534] [2023-02-15 20:17:55,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 20:17:55,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:17:55,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:17:55,033 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:17:55,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 20:17:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:17:55,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 20:17:55,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:17:55,357 INFO L134 CoverageAnalysis]: Checked inductivity of 11065 backedges. 2842 proven. 158 refuted. 0 times theorem prover too weak. 8065 trivial. 0 not checked. [2023-02-15 20:17:55,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:17:55,574 INFO L134 CoverageAnalysis]: Checked inductivity of 11065 backedges. 2842 proven. 158 refuted. 0 times theorem prover too weak. 8065 trivial. 0 not checked. [2023-02-15 20:17:55,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417700534] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:17:55,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:17:55,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 26 [2023-02-15 20:17:55,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140517849] [2023-02-15 20:17:55,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:17:55,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-15 20:17:55,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:17:55,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-15 20:17:55,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2023-02-15 20:17:55,577 INFO L87 Difference]: Start difference. First operand 334 states and 367 transitions. Second operand has 26 states, 26 states have (on average 4.0) internal successors, (104), 26 states have internal predecessors, (104), 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) [2023-02-15 20:18:00,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:18:00,257 INFO L93 Difference]: Finished difference Result 1727 states and 2034 transitions. [2023-02-15 20:18:00,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-02-15 20:18:00,257 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.0) internal successors, (104), 26 states have internal predecessors, (104), 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 333 [2023-02-15 20:18:00,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:18:00,260 INFO L225 Difference]: With dead ends: 1727 [2023-02-15 20:18:00,260 INFO L226 Difference]: Without dead ends: 1397 [2023-02-15 20:18:00,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 746 GetRequests, 653 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2829 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1425, Invalid=7505, Unknown=0, NotChecked=0, Total=8930 [2023-02-15 20:18:00,263 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 394 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-15 20:18:00,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 76 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-15 20:18:00,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2023-02-15 20:18:00,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1251. [2023-02-15 20:18:00,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 1.0488) internal successors, (1311), 1250 states have internal predecessors, (1311), 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) [2023-02-15 20:18:00,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 1311 transitions. [2023-02-15 20:18:00,495 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 1311 transitions. Word has length 333 [2023-02-15 20:18:00,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:18:00,495 INFO L495 AbstractCegarLoop]: Abstraction has 1251 states and 1311 transitions. [2023-02-15 20:18:00,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.0) internal successors, (104), 26 states have internal predecessors, (104), 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) [2023-02-15 20:18:00,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 1311 transitions. [2023-02-15 20:18:00,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1249 [2023-02-15 20:18:00,528 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:18:00,528 INFO L195 NwaCegarLoop]: trace histogram [358, 357, 357, 42, 41, 41, 7, 6, 6, 6, 5, 5, 5, 4, 4, 1, 1, 1, 1] [2023-02-15 20:18:00,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-02-15 20:18:00,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-15 20:18:00,734 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:18:00,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:18:00,735 INFO L85 PathProgramCache]: Analyzing trace with hash 2083908146, now seen corresponding path program 8 times [2023-02-15 20:18:00,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:18:00,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324968963] [2023-02-15 20:18:00,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:18:00,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:18:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:18:05,647 INFO L134 CoverageAnalysis]: Checked inductivity of 208950 backedges. 71 proven. 10628 refuted. 0 times theorem prover too weak. 198251 trivial. 0 not checked. [2023-02-15 20:18:05,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:18:05,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324968963] [2023-02-15 20:18:05,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324968963] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:18:05,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741667975] [2023-02-15 20:18:05,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:18:05,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:18:05,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:18:05,649 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:18:05,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 20:18:05,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:18:05,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:18:06,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 1817 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-15 20:18:06,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:18:06,460 INFO L134 CoverageAnalysis]: Checked inductivity of 208950 backedges. 37450 proven. 861 refuted. 0 times theorem prover too weak. 170639 trivial. 0 not checked. [2023-02-15 20:18:06,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:18:07,119 INFO L134 CoverageAnalysis]: Checked inductivity of 208950 backedges. 36932 proven. 1379 refuted. 0 times theorem prover too weak. 170639 trivial. 0 not checked. [2023-02-15 20:18:07,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741667975] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:18:07,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:18:07,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21, 21] total 52 [2023-02-15 20:18:07,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615049352] [2023-02-15 20:18:07,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:18:07,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-15 20:18:07,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:18:07,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-15 20:18:07,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=2332, Unknown=0, NotChecked=0, Total=2652 [2023-02-15 20:18:07,123 INFO L87 Difference]: Start difference. First operand 1251 states and 1311 transitions. Second operand has 52 states, 52 states have (on average 3.5) internal successors, (182), 52 states have internal predecessors, (182), 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) [2023-02-15 20:18:34,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:18:34,462 INFO L93 Difference]: Finished difference Result 3948 states and 4562 transitions. [2023-02-15 20:18:34,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-15 20:18:34,463 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.5) internal successors, (182), 52 states have internal predecessors, (182), 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 1248 [2023-02-15 20:18:34,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:18:34,471 INFO L225 Difference]: With dead ends: 3948 [2023-02-15 20:18:34,471 INFO L226 Difference]: Without dead ends: 2701 [2023-02-15 20:18:34,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2535 GetRequests, 2461 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=853, Invalid=4846, Unknown=1, NotChecked=0, Total=5700 [2023-02-15 20:18:34,475 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 222 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:18:34,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 105 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-02-15 20:18:34,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2023-02-15 20:18:34,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2699. [2023-02-15 20:18:34,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2699 states, 2698 states have (on average 1.0226093402520386) internal successors, (2759), 2698 states have internal predecessors, (2759), 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) [2023-02-15 20:18:34,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 2759 transitions. [2023-02-15 20:18:34,973 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 2759 transitions. Word has length 1248 [2023-02-15 20:18:34,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:18:34,973 INFO L495 AbstractCegarLoop]: Abstraction has 2699 states and 2759 transitions. [2023-02-15 20:18:34,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.5) internal successors, (182), 52 states have internal predecessors, (182), 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) [2023-02-15 20:18:34,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 2759 transitions. [2023-02-15 20:18:35,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2695 [2023-02-15 20:18:35,010 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:18:35,010 INFO L195 NwaCegarLoop]: trace histogram [840, 839, 839, 42, 41, 41, 7, 6, 6, 6, 5, 5, 5, 4, 4, 1, 1, 1, 1] [2023-02-15 20:18:35,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-15 20:18:35,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-15 20:18:35,220 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:18:35,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:18:35,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1889813078, now seen corresponding path program 9 times [2023-02-15 20:18:35,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:18:35,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974712692] [2023-02-15 20:18:35,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:18:35,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:18:39,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:18:50,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1093661 backedges. 71 proven. 52249 refuted. 0 times theorem prover too weak. 1041341 trivial. 0 not checked. [2023-02-15 20:18:50,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:18:50,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974712692] [2023-02-15 20:18:50,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974712692] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:18:50,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041069741] [2023-02-15 20:18:50,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:18:50,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:18:50,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:18:50,591 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:18:50,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 20:18:50,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-15 20:18:50,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:18:50,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 20:18:50,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:18:54,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1093661 backedges. 446340 proven. 44503 refuted. 0 times theorem prover too weak. 602818 trivial. 0 not checked. [2023-02-15 20:18:54,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:18:59,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1093661 backedges. 0 proven. 490843 refuted. 0 times theorem prover too weak. 602818 trivial. 0 not checked. [2023-02-15 20:18:59,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041069741] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:18:59,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:18:59,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 5, 5] total 32 [2023-02-15 20:18:59,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239864601] [2023-02-15 20:18:59,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:18:59,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-15 20:18:59,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:18:59,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-15 20:18:59,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2023-02-15 20:18:59,480 INFO L87 Difference]: Start difference. First operand 2699 states and 2759 transitions. Second operand has 32 states, 32 states have (on average 4.78125) internal successors, (153), 32 states have internal predecessors, (153), 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) [2023-02-15 20:19:06,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:19:06,683 INFO L93 Difference]: Finished difference Result 15593 states and 16267 transitions. [2023-02-15 20:19:06,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2023-02-15 20:19:06,683 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.78125) internal successors, (153), 32 states have internal predecessors, (153), 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 2694 [2023-02-15 20:19:06,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:19:06,739 INFO L225 Difference]: With dead ends: 15593 [2023-02-15 20:19:06,740 INFO L226 Difference]: Without dead ends: 12898 [2023-02-15 20:19:06,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5526 GetRequests, 5383 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6602 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2220, Invalid=18660, Unknown=0, NotChecked=0, Total=20880 [2023-02-15 20:19:06,776 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 249 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 3045 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 3171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 3045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:19:06,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 89 Invalid, 3171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 3045 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-15 20:19:06,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12898 states. [2023-02-15 20:19:07,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12898 to 6288. [2023-02-15 20:19:07,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6288 states, 6287 states have (on average 1.0189279465563863) internal successors, (6406), 6287 states have internal predecessors, (6406), 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) [2023-02-15 20:19:07,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6288 states to 6288 states and 6406 transitions. [2023-02-15 20:19:07,947 INFO L78 Accepts]: Start accepts. Automaton has 6288 states and 6406 transitions. Word has length 2694 [2023-02-15 20:19:07,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:19:07,948 INFO L495 AbstractCegarLoop]: Abstraction has 6288 states and 6406 transitions. [2023-02-15 20:19:07,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.78125) internal successors, (153), 32 states have internal predecessors, (153), 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) [2023-02-15 20:19:07,949 INFO L276 IsEmpty]: Start isEmpty. Operand 6288 states and 6406 transitions. [2023-02-15 20:19:08,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6286 [2023-02-15 20:19:08,153 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:19:08,155 INFO L195 NwaCegarLoop]: trace histogram [1981, 1980, 1980, 90, 89, 89, 15, 14, 14, 6, 5, 5, 5, 4, 4, 1, 1, 1, 1] [2023-02-15 20:19:08,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-02-15 20:19:08,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-15 20:19:08,357 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:19:08,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:19:08,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1959547704, now seen corresponding path program 10 times [2023-02-15 20:19:08,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:19:08,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527916281] [2023-02-15 20:19:08,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:19:08,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:19:35,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:20:15,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6071439 backedges. 135 proven. 135928 refuted. 0 times theorem prover too weak. 5935376 trivial. 0 not checked. [2023-02-15 20:20:15,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:20:15,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527916281] [2023-02-15 20:20:15,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527916281] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:20:15,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550904299] [2023-02-15 20:20:15,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:20:15,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:20:15,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:20:15,505 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:20:15,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 20:20:17,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:20:17,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:20:17,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 8645 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 20:20:17,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:20:24,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6071439 backedges. 2913718 proven. 50471 refuted. 0 times theorem prover too weak. 3107250 trivial. 0 not checked. [2023-02-15 20:20:24,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:20:30,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6071439 backedges. 2376505 proven. 587684 refuted. 0 times theorem prover too weak. 3107250 trivial. 0 not checked. [2023-02-15 20:20:30,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550904299] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:20:30,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:20:30,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 17, 17] total 57 [2023-02-15 20:20:30,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845675217] [2023-02-15 20:20:30,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:20:30,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-02-15 20:20:30,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:20:30,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-02-15 20:20:30,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=2838, Unknown=0, NotChecked=0, Total=3192 [2023-02-15 20:20:30,816 INFO L87 Difference]: Start difference. First operand 6288 states and 6406 transitions. Second operand has 57 states, 57 states have (on average 4.140350877192983) internal successors, (236), 57 states have internal predecessors, (236), 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)