./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/array-examples/sorting_bubblesort_ground-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 68585835b92043bfb2f3c62590e96ff685993869f8a251aecd9fe4c8aaea0e1e --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 09:25:30,053 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 09:25:30,055 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 09:25:30,090 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 09:25:30,091 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 09:25:30,092 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 09:25:30,093 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 09:25:30,095 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 09:25:30,096 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 09:25:30,100 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 09:25:30,101 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 09:25:30,102 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 09:25:30,103 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 09:25:30,104 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 09:25:30,105 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 09:25:30,108 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 09:25:30,109 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 09:25:30,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 09:25:30,111 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 09:25:30,115 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 09:25:30,117 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 09:25:30,118 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 09:25:30,118 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 09:25:30,119 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 09:25:30,120 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 09:25:30,125 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 09:25:30,125 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 09:25:30,126 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 09:25:30,127 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 09:25:30,127 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 09:25:30,128 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 09:25:30,128 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 09:25:30,129 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 09:25:30,130 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 09:25:30,130 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 09:25:30,132 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 09:25:30,132 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 09:25:30,132 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 09:25:30,132 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 09:25:30,133 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 09:25:30,133 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 09:25:30,134 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 09:25:30,135 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 09:25:30,155 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 09:25:30,156 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 09:25:30,156 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 09:25:30,156 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 09:25:30,157 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 09:25:30,157 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 09:25:30,157 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 09:25:30,158 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 09:25:30,158 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 09:25:30,158 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 09:25:30,159 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 09:25:30,159 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 09:25:30,159 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 09:25:30,159 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 09:25:30,159 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 09:25:30,159 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 09:25:30,160 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 09:25:30,160 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 09:25:30,160 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 09:25:30,161 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 09:25:30,161 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 09:25:30,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 09:25:30,161 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 09:25:30,161 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 09:25:30,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 09:25:30,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 09:25:30,162 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 09:25:30,162 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 09:25:30,162 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 09:25:30,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 09:25:30,162 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 09:25:30,163 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 09:25:30,163 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 09:25:30,163 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68585835b92043bfb2f3c62590e96ff685993869f8a251aecd9fe4c8aaea0e1e [2022-07-13 09:25:30,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 09:25:30,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 09:25:30,361 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 09:25:30,362 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 09:25:30,362 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 09:25:30,363 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i [2022-07-13 09:25:30,420 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/562876327/33985fe2f7e840438d9ec97e1d7ce115/FLAGdb5725b27 [2022-07-13 09:25:30,712 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 09:25:30,713 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i [2022-07-13 09:25:30,717 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/562876327/33985fe2f7e840438d9ec97e1d7ce115/FLAGdb5725b27 [2022-07-13 09:25:31,153 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/562876327/33985fe2f7e840438d9ec97e1d7ce115 [2022-07-13 09:25:31,154 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 09:25:31,155 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 09:25:31,158 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 09:25:31,158 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 09:25:31,160 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 09:25:31,161 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:25:31" (1/1) ... [2022-07-13 09:25:31,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55d33582 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:25:31, skipping insertion in model container [2022-07-13 09:25:31,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:25:31" (1/1) ... [2022-07-13 09:25:31,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 09:25:31,177 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 09:25:31,284 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i[820,833] [2022-07-13 09:25:31,294 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 09:25:31,299 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 09:25:31,306 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i[820,833] [2022-07-13 09:25:31,311 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 09:25:31,319 INFO L208 MainTranslator]: Completed translation [2022-07-13 09:25:31,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:25:31 WrapperNode [2022-07-13 09:25:31,320 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 09:25:31,321 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 09:25:31,321 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 09:25:31,321 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 09:25:31,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:25:31" (1/1) ... [2022-07-13 09:25:31,337 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:25:31" (1/1) ... [2022-07-13 09:25:31,349 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 82 [2022-07-13 09:25:31,349 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 09:25:31,350 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 09:25:31,350 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 09:25:31,350 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 09:25:31,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:25:31" (1/1) ... [2022-07-13 09:25:31,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:25:31" (1/1) ... [2022-07-13 09:25:31,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:25:31" (1/1) ... [2022-07-13 09:25:31,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:25:31" (1/1) ... [2022-07-13 09:25:31,369 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:25:31" (1/1) ... [2022-07-13 09:25:31,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:25:31" (1/1) ... [2022-07-13 09:25:31,377 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:25:31" (1/1) ... [2022-07-13 09:25:31,378 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 09:25:31,379 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 09:25:31,379 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 09:25:31,379 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 09:25:31,385 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:25:31" (1/1) ... [2022-07-13 09:25:31,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 09:25:31,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:25:31,407 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 09:25:31,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 09:25:31,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 09:25:31,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 09:25:31,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 09:25:31,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 09:25:31,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 09:25:31,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 09:25:31,441 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 09:25:31,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 09:25:31,486 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 09:25:31,488 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 09:25:31,571 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 09:25:31,574 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 09:25:31,575 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-13 09:25:31,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:25:31 BoogieIcfgContainer [2022-07-13 09:25:31,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 09:25:31,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 09:25:31,577 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 09:25:31,579 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 09:25:31,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:25:31" (1/3) ... [2022-07-13 09:25:31,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@495454d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:25:31, skipping insertion in model container [2022-07-13 09:25:31,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:25:31" (2/3) ... [2022-07-13 09:25:31,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@495454d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:25:31, skipping insertion in model container [2022-07-13 09:25:31,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:25:31" (3/3) ... [2022-07-13 09:25:31,581 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-1.i [2022-07-13 09:25:31,590 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 09:25:31,590 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 09:25:31,619 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 09:25:31,623 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@568c3b96, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2c1af2b0 [2022-07-13 09:25:31,624 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 09:25:31,626 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:31,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-13 09:25:31,630 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:31,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:25:31,631 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:31,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:31,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1960376238, now seen corresponding path program 1 times [2022-07-13 09:25:31,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:31,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999030383] [2022-07-13 09:25:31,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:31,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:31,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:31,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 09:25:31,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:31,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999030383] [2022-07-13 09:25:31,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999030383] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 09:25:31,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 09:25:31,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 09:25:31,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890574679] [2022-07-13 09:25:31,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 09:25:31,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 09:25:31,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:25:31,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 09:25:31,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 09:25:31,854 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:31,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:25:31,873 INFO L93 Difference]: Finished difference Result 42 states and 64 transitions. [2022-07-13 09:25:31,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 09:25:31,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-13 09:25:31,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:25:31,882 INFO L225 Difference]: With dead ends: 42 [2022-07-13 09:25:31,882 INFO L226 Difference]: Without dead ends: 20 [2022-07-13 09:25:31,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 09:25:31,890 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 09:25:31,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 48 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 09:25:31,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-13 09:25:31,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-07-13 09:25:31,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:31,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-07-13 09:25:31,919 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2022-07-13 09:25:31,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:25:31,919 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-07-13 09:25:31,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:31,920 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-07-13 09:25:31,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-13 09:25:31,921 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:31,921 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:25:31,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 09:25:31,922 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:31,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:31,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1305178672, now seen corresponding path program 1 times [2022-07-13 09:25:31,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:31,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499732685] [2022-07-13 09:25:31,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:31,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:31,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:31,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 09:25:32,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:32,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499732685] [2022-07-13 09:25:32,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499732685] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:25:32,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308462533] [2022-07-13 09:25:32,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:32,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:32,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:25:32,016 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:25:32,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 09:25:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:32,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 09:25:32,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:25:32,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 09:25:32,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 09:25:32,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308462533] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 09:25:32,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 09:25:32,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-13 09:25:32,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671928544] [2022-07-13 09:25:32,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 09:25:32,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 09:25:32,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:25:32,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 09:25:32,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 09:25:32,105 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:32,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:25:32,119 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2022-07-13 09:25:32,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 09:25:32,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 [2022-07-13 09:25:32,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:25:32,121 INFO L225 Difference]: With dead ends: 32 [2022-07-13 09:25:32,121 INFO L226 Difference]: Without dead ends: 23 [2022-07-13 09:25:32,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 09:25:32,123 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 09:25:32,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 44 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 09:25:32,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-13 09:25:32,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-07-13 09:25:32,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 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) [2022-07-13 09:25:32,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2022-07-13 09:25:32,132 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 12 [2022-07-13 09:25:32,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:25:32,135 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2022-07-13 09:25:32,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:32,135 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2022-07-13 09:25:32,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-13 09:25:32,136 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:32,136 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:25:32,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 09:25:32,353 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 [2022-07-13 09:25:32,353 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:32,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:32,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1356848343, now seen corresponding path program 1 times [2022-07-13 09:25:32,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:32,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240009488] [2022-07-13 09:25:32,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:32,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:32,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:32,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 09:25:32,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:32,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240009488] [2022-07-13 09:25:32,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240009488] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:25:32,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56147108] [2022-07-13 09:25:32,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:32,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:32,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:25:32,393 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:25:32,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 09:25:32,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:32,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 09:25:32,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:25:32,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 09:25:32,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 09:25:32,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56147108] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 09:25:32,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 09:25:32,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-13 09:25:32,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255051004] [2022-07-13 09:25:32,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 09:25:32,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 09:25:32,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:25:32,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 09:25:32,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 09:25:32,457 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:32,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:25:32,467 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2022-07-13 09:25:32,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 09:25:32,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 14 [2022-07-13 09:25:32,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:25:32,468 INFO L225 Difference]: With dead ends: 44 [2022-07-13 09:25:32,469 INFO L226 Difference]: Without dead ends: 27 [2022-07-13 09:25:32,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 09:25:32,470 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 09:25:32,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 37 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 09:25:32,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-13 09:25:32,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2022-07-13 09:25:32,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:32,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2022-07-13 09:25:32,474 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 14 [2022-07-13 09:25:32,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:25:32,474 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2022-07-13 09:25:32,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:32,474 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2022-07-13 09:25:32,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-13 09:25:32,475 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:32,475 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:25:32,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 09:25:32,688 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 [2022-07-13 09:25:32,689 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:32,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:32,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1942419029, now seen corresponding path program 1 times [2022-07-13 09:25:32,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:32,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290706965] [2022-07-13 09:25:32,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:32,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:32,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 09:25:32,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:32,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290706965] [2022-07-13 09:25:32,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290706965] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:25:32,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642649118] [2022-07-13 09:25:32,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:32,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:32,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:25:32,720 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:25:32,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 09:25:32,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:32,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 09:25:32,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:25:32,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 09:25:32,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:25:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 09:25:32,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642649118] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:25:32,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:25:32,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-13 09:25:32,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398951477] [2022-07-13 09:25:32,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:25:32,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 09:25:32,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:25:32,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 09:25:32,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-13 09:25:32,853 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:32,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:25:32,882 INFO L93 Difference]: Finished difference Result 49 states and 65 transitions. [2022-07-13 09:25:32,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 09:25:32,883 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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 17 [2022-07-13 09:25:32,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:25:32,883 INFO L225 Difference]: With dead ends: 49 [2022-07-13 09:25:32,884 INFO L226 Difference]: Without dead ends: 30 [2022-07-13 09:25:32,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-13 09:25:32,885 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 4 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 09:25:32,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 59 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 09:25:32,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-13 09:25:32,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-07-13 09:25:32,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:32,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-07-13 09:25:32,888 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 17 [2022-07-13 09:25:32,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:25:32,888 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-07-13 09:25:32,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:32,889 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-07-13 09:25:32,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-13 09:25:32,891 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:32,892 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:25:32,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 09:25:33,107 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 [2022-07-13 09:25:33,108 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:33,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:33,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1612157157, now seen corresponding path program 2 times [2022-07-13 09:25:33,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:33,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766752162] [2022-07-13 09:25:33,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:33,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:33,169 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 09:25:33,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:33,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766752162] [2022-07-13 09:25:33,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766752162] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:25:33,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184377100] [2022-07-13 09:25:33,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 09:25:33,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:33,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:25:33,173 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:25:33,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 09:25:33,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 09:25:33,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:25:33,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 09:25:33,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:25:33,257 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 09:25:33,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:25:33,308 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 09:25:33,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184377100] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:25:33,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:25:33,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-07-13 09:25:33,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76007633] [2022-07-13 09:25:33,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:25:33,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 09:25:33,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:25:33,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 09:25:33,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-13 09:25:33,310 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:33,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:25:33,352 INFO L93 Difference]: Finished difference Result 70 states and 94 transitions. [2022-07-13 09:25:33,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 09:25:33,353 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-13 09:25:33,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:25:33,353 INFO L225 Difference]: With dead ends: 70 [2022-07-13 09:25:33,354 INFO L226 Difference]: Without dead ends: 51 [2022-07-13 09:25:33,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-13 09:25:33,355 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 22 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 09:25:33,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 09:25:33,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-13 09:25:33,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2022-07-13 09:25:33,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:33,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-07-13 09:25:33,360 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 23 [2022-07-13 09:25:33,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:25:33,360 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-07-13 09:25:33,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:33,360 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-07-13 09:25:33,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-13 09:25:33,361 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:33,361 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:25:33,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 09:25:33,578 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 [2022-07-13 09:25:33,578 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:33,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:33,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1679231593, now seen corresponding path program 3 times [2022-07-13 09:25:33,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:33,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003710096] [2022-07-13 09:25:33,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:33,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:33,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:33,630 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-13 09:25:33,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:33,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003710096] [2022-07-13 09:25:33,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003710096] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:25:33,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62433070] [2022-07-13 09:25:33,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 09:25:33,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:33,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:25:33,632 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:25:33,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 09:25:33,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-13 09:25:33,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:25:33,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 09:25:33,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:25:33,699 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-13 09:25:33,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:25:33,726 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-13 09:25:33,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62433070] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:25:33,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:25:33,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-07-13 09:25:33,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493550923] [2022-07-13 09:25:33,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:25:33,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 09:25:33,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:25:33,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 09:25:33,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-07-13 09:25:33,728 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:33,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:25:33,761 INFO L93 Difference]: Finished difference Result 94 states and 125 transitions. [2022-07-13 09:25:33,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 09:25:33,761 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 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 38 [2022-07-13 09:25:33,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:25:33,762 INFO L225 Difference]: With dead ends: 94 [2022-07-13 09:25:33,762 INFO L226 Difference]: Without dead ends: 71 [2022-07-13 09:25:33,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-07-13 09:25:33,763 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 31 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 09:25:33,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 58 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 09:25:33,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-13 09:25:33,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-07-13 09:25:33,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 70 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:33,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2022-07-13 09:25:33,769 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 38 [2022-07-13 09:25:33,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:25:33,769 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2022-07-13 09:25:33,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:33,769 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2022-07-13 09:25:33,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-13 09:25:33,770 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:33,770 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:25:33,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-13 09:25:33,983 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 [2022-07-13 09:25:33,983 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:33,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:33,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1555127913, now seen corresponding path program 4 times [2022-07-13 09:25:33,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:33,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391105136] [2022-07-13 09:25:33,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:33,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:34,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:34,126 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-13 09:25:34,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:34,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391105136] [2022-07-13 09:25:34,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391105136] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:25:34,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408458420] [2022-07-13 09:25:34,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 09:25:34,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:34,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:25:34,130 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:25:34,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 09:25:34,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 09:25:34,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:25:34,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 09:25:34,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:25:34,237 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-13 09:25:34,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:25:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-13 09:25:34,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408458420] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:25:34,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:25:34,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-07-13 09:25:34,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65718877] [2022-07-13 09:25:34,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:25:34,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-13 09:25:34,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:25:34,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-13 09:25:34,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-13 09:25:34,428 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 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) [2022-07-13 09:25:34,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:25:34,486 INFO L93 Difference]: Finished difference Result 143 states and 186 transitions. [2022-07-13 09:25:34,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-13 09:25:34,487 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 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) Word has length 50 [2022-07-13 09:25:34,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:25:34,490 INFO L225 Difference]: With dead ends: 143 [2022-07-13 09:25:34,490 INFO L226 Difference]: Without dead ends: 95 [2022-07-13 09:25:34,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-13 09:25:34,492 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 33 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 09:25:34,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 78 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 09:25:34,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-13 09:25:34,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-07-13 09:25:34,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.1808510638297873) internal successors, (111), 94 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:34,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 111 transitions. [2022-07-13 09:25:34,506 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 111 transitions. Word has length 50 [2022-07-13 09:25:34,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:25:34,507 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 111 transitions. [2022-07-13 09:25:34,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 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) [2022-07-13 09:25:34,510 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 111 transitions. [2022-07-13 09:25:34,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-13 09:25:34,511 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:34,511 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:25:34,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 09:25:34,712 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 [2022-07-13 09:25:34,712 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:34,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:34,712 INFO L85 PathProgramCache]: Analyzing trace with hash -2132388991, now seen corresponding path program 5 times [2022-07-13 09:25:34,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:34,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747707531] [2022-07-13 09:25:34,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:34,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:35,026 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-13 09:25:35,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:35,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747707531] [2022-07-13 09:25:35,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747707531] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:25:35,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830649202] [2022-07-13 09:25:35,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 09:25:35,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:35,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:25:35,028 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 09:25:35,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 09:25:35,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-07-13 09:25:35,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:25:35,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 09:25:35,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:25:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-07-13 09:25:35,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:25:35,667 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-07-13 09:25:35,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830649202] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:25:35,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:25:35,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9, 9] total 39 [2022-07-13 09:25:35,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234564333] [2022-07-13 09:25:35,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:25:35,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-13 09:25:35,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:25:35,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-13 09:25:35,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2022-07-13 09:25:35,670 INFO L87 Difference]: Start difference. First operand 95 states and 111 transitions. Second operand has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 39 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) [2022-07-13 09:25:35,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:25:35,787 INFO L93 Difference]: Finished difference Result 194 states and 258 transitions. [2022-07-13 09:25:35,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-13 09:25:35,788 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 39 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 74 [2022-07-13 09:25:35,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:25:35,790 INFO L225 Difference]: With dead ends: 194 [2022-07-13 09:25:35,790 INFO L226 Difference]: Without dead ends: 146 [2022-07-13 09:25:35,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2022-07-13 09:25:35,791 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 89 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 09:25:35,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 123 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 09:25:35,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-07-13 09:25:35,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2022-07-13 09:25:35,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.2291666666666667) internal successors, (177), 144 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:35,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 177 transitions. [2022-07-13 09:25:35,821 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 177 transitions. Word has length 74 [2022-07-13 09:25:35,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:25:35,821 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 177 transitions. [2022-07-13 09:25:35,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 39 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) [2022-07-13 09:25:35,822 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 177 transitions. [2022-07-13 09:25:35,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-13 09:25:35,824 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:35,825 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:25:35,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 09:25:36,039 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 [2022-07-13 09:25:36,039 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:36,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:36,040 INFO L85 PathProgramCache]: Analyzing trace with hash -478169085, now seen corresponding path program 6 times [2022-07-13 09:25:36,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:36,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476157718] [2022-07-13 09:25:36,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:36,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:36,340 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-07-13 09:25:36,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:36,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476157718] [2022-07-13 09:25:36,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476157718] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:25:36,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861602073] [2022-07-13 09:25:36,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 09:25:36,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:36,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:25:36,342 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) [2022-07-13 09:25:36,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 09:25:36,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-13 09:25:36,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:25:36,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-13 09:25:36,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:25:36,747 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 09:25:36,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-07-13 09:25:36,779 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 1 proven. 72 refuted. 0 times theorem prover too weak. 744 trivial. 0 not checked. [2022-07-13 09:25:36,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:25:36,959 INFO L356 Elim1Store]: treesize reduction 56, result has 31.7 percent of original size [2022-07-13 09:25:36,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 32 [2022-07-13 09:25:36,996 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2022-07-13 09:25:36,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861602073] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:25:36,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:25:36,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10, 8] total 39 [2022-07-13 09:25:36,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795090133] [2022-07-13 09:25:36,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:25:36,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-13 09:25:36,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:25:36,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-13 09:25:36,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=1086, Unknown=0, NotChecked=0, Total=1482 [2022-07-13 09:25:36,999 INFO L87 Difference]: Start difference. First operand 145 states and 177 transitions. Second operand has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:37,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:25:37,595 INFO L93 Difference]: Finished difference Result 263 states and 333 transitions. [2022-07-13 09:25:37,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-13 09:25:37,596 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 39 states have internal predecessors, (96), 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 100 [2022-07-13 09:25:37,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:25:37,597 INFO L225 Difference]: With dead ends: 263 [2022-07-13 09:25:37,597 INFO L226 Difference]: Without dead ends: 167 [2022-07-13 09:25:37,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1073, Invalid=3483, Unknown=0, NotChecked=0, Total=4556 [2022-07-13 09:25:37,600 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 103 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 09:25:37,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 185 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 09:25:37,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-07-13 09:25:37,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 150. [2022-07-13 09:25:37,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.221476510067114) internal successors, (182), 149 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) [2022-07-13 09:25:37,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 182 transitions. [2022-07-13 09:25:37,609 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 182 transitions. Word has length 100 [2022-07-13 09:25:37,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:25:37,609 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 182 transitions. [2022-07-13 09:25:37,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:37,609 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 182 transitions. [2022-07-13 09:25:37,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-13 09:25:37,612 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:37,612 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:25:37,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-13 09:25:37,827 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 [2022-07-13 09:25:37,828 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:37,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:37,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1178743045, now seen corresponding path program 1 times [2022-07-13 09:25:37,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:37,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697612829] [2022-07-13 09:25:37,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:37,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:37,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:38,141 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2022-07-13 09:25:38,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:38,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697612829] [2022-07-13 09:25:38,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697612829] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:25:38,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886820563] [2022-07-13 09:25:38,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:38,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:38,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:25:38,143 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) [2022-07-13 09:25:38,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 09:25:38,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:38,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-13 09:25:38,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:25:38,333 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2022-07-13 09:25:38,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:25:38,959 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2022-07-13 09:25:38,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886820563] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:25:38,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:25:38,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2022-07-13 09:25:38,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744822044] [2022-07-13 09:25:38,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:25:38,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-13 09:25:38,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:25:38,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-13 09:25:38,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-07-13 09:25:38,962 INFO L87 Difference]: Start difference. First operand 150 states and 182 transitions. Second operand has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 53 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:39,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:25:39,075 INFO L93 Difference]: Finished difference Result 301 states and 390 transitions. [2022-07-13 09:25:39,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-13 09:25:39,075 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 53 states have internal predecessors, (119), 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 106 [2022-07-13 09:25:39,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:25:39,076 INFO L225 Difference]: With dead ends: 301 [2022-07-13 09:25:39,077 INFO L226 Difference]: Without dead ends: 202 [2022-07-13 09:25:39,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-07-13 09:25:39,079 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 75 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 09:25:39,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 78 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 09:25:39,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-07-13 09:25:39,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2022-07-13 09:25:39,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.164179104477612) internal successors, (234), 201 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:39,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 234 transitions. [2022-07-13 09:25:39,087 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 234 transitions. Word has length 106 [2022-07-13 09:25:39,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:25:39,088 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 234 transitions. [2022-07-13 09:25:39,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 53 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:39,088 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 234 transitions. [2022-07-13 09:25:39,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-07-13 09:25:39,093 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:39,093 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:25:39,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 09:25:39,308 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 [2022-07-13 09:25:39,308 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:39,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:39,309 INFO L85 PathProgramCache]: Analyzing trace with hash -619301457, now seen corresponding path program 2 times [2022-07-13 09:25:39,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:39,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367769473] [2022-07-13 09:25:39,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:39,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:40,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2790 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2022-07-13 09:25:40,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:40,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367769473] [2022-07-13 09:25:40,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367769473] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:25:40,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025651356] [2022-07-13 09:25:40,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 09:25:40,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:40,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:25:40,272 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) [2022-07-13 09:25:40,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 09:25:40,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 09:25:40,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:25:40,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-13 09:25:40,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:25:40,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2790 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2022-07-13 09:25:40,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:25:42,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2790 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2022-07-13 09:25:42,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025651356] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:25:42,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:25:42,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 105 [2022-07-13 09:25:42,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814544300] [2022-07-13 09:25:42,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:25:42,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-07-13 09:25:42,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:25:42,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-07-13 09:25:42,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2022-07-13 09:25:42,898 INFO L87 Difference]: Start difference. First operand 202 states and 234 transitions. Second operand has 105 states, 105 states have (on average 2.123809523809524) internal successors, (223), 105 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:43,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:25:43,103 INFO L93 Difference]: Finished difference Result 405 states and 520 transitions. [2022-07-13 09:25:43,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-07-13 09:25:43,104 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.123809523809524) internal successors, (223), 105 states have internal predecessors, (223), 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 158 [2022-07-13 09:25:43,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:25:43,105 INFO L225 Difference]: With dead ends: 405 [2022-07-13 09:25:43,105 INFO L226 Difference]: Without dead ends: 306 [2022-07-13 09:25:43,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2022-07-13 09:25:43,108 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 153 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 09:25:43,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 116 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 09:25:43,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-07-13 09:25:43,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 306. [2022-07-13 09:25:43,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.1081967213114754) internal successors, (338), 305 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:43,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 338 transitions. [2022-07-13 09:25:43,116 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 338 transitions. Word has length 158 [2022-07-13 09:25:43,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:25:43,116 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 338 transitions. [2022-07-13 09:25:43,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.123809523809524) internal successors, (223), 105 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:43,116 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 338 transitions. [2022-07-13 09:25:43,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-07-13 09:25:43,118 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:43,118 INFO L195 NwaCegarLoop]: trace histogram [102, 102, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:25:43,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 09:25:43,323 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 [2022-07-13 09:25:43,324 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:43,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:43,324 INFO L85 PathProgramCache]: Analyzing trace with hash -535466729, now seen corresponding path program 3 times [2022-07-13 09:25:43,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:43,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769253369] [2022-07-13 09:25:43,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:43,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:43,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:46,532 INFO L134 CoverageAnalysis]: Checked inductivity of 10694 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2022-07-13 09:25:46,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:46,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769253369] [2022-07-13 09:25:46,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769253369] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:25:46,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081433887] [2022-07-13 09:25:46,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 09:25:46,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:46,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:25:46,534 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) [2022-07-13 09:25:46,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 09:25:46,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-13 09:25:46,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:25:46,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-13 09:25:46,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:25:47,282 INFO L356 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-07-13 09:25:47,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 13 [2022-07-13 09:25:47,328 INFO L134 CoverageAnalysis]: Checked inductivity of 10694 backedges. 1 proven. 67 refuted. 0 times theorem prover too weak. 10626 trivial. 0 not checked. [2022-07-13 09:25:47,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:25:47,952 INFO L356 Elim1Store]: treesize reduction 87, result has 34.6 percent of original size [2022-07-13 09:25:47,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 55 [2022-07-13 09:25:48,092 INFO L134 CoverageAnalysis]: Checked inductivity of 10694 backedges. 13 proven. 55 refuted. 0 times theorem prover too weak. 10626 trivial. 0 not checked. [2022-07-13 09:25:48,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081433887] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:25:48,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:25:48,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 12, 12] total 122 [2022-07-13 09:25:48,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794343478] [2022-07-13 09:25:48,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:25:48,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-07-13 09:25:48,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:25:48,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-07-13 09:25:48,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5534, Invalid=9228, Unknown=0, NotChecked=0, Total=14762 [2022-07-13 09:25:48,110 INFO L87 Difference]: Start difference. First operand 306 states and 338 transitions. Second operand has 122 states, 122 states have (on average 2.1311475409836067) internal successors, (260), 122 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:49,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:25:49,291 INFO L93 Difference]: Finished difference Result 473 states and 558 transitions. [2022-07-13 09:25:49,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-07-13 09:25:49,291 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.1311475409836067) internal successors, (260), 122 states have internal predecessors, (260), 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 262 [2022-07-13 09:25:49,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:25:49,294 INFO L225 Difference]: With dead ends: 473 [2022-07-13 09:25:49,294 INFO L226 Difference]: Without dead ends: 374 [2022-07-13 09:25:49,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 504 SyntacticMatches, 3 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2233 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5647, Invalid=12443, Unknown=0, NotChecked=0, Total=18090 [2022-07-13 09:25:49,297 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 182 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 09:25:49,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 277 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 09:25:49,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-07-13 09:25:49,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 312. [2022-07-13 09:25:49,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 1.1061093247588425) internal successors, (344), 311 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:49,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 344 transitions. [2022-07-13 09:25:49,306 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 344 transitions. Word has length 262 [2022-07-13 09:25:49,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:25:49,306 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 344 transitions. [2022-07-13 09:25:49,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.1311475409836067) internal successors, (260), 122 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:25:49,307 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 344 transitions. [2022-07-13 09:25:49,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-07-13 09:25:49,308 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:25:49,309 INFO L195 NwaCegarLoop]: trace histogram [103, 103, 14, 14, 14, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:25:49,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 09:25:49,525 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 [2022-07-13 09:25:49,526 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:25:49,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:25:49,526 INFO L85 PathProgramCache]: Analyzing trace with hash 2104195471, now seen corresponding path program 4 times [2022-07-13 09:25:49,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:25:49,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290995776] [2022-07-13 09:25:49,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:25:49,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:25:49,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:25:52,772 INFO L134 CoverageAnalysis]: Checked inductivity of 10905 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2022-07-13 09:25:52,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:25:52,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290995776] [2022-07-13 09:25:52,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290995776] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:25:52,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182152977] [2022-07-13 09:25:52,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 09:25:52,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:25:52,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:25:52,775 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) [2022-07-13 09:25:52,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 09:25:53,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 09:25:53,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:25:53,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 105 conjunts are in the unsatisfiable core [2022-07-13 09:25:53,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:25:53,221 INFO L134 CoverageAnalysis]: Checked inductivity of 10905 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2022-07-13 09:25:53,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:26:02,261 INFO L134 CoverageAnalysis]: Checked inductivity of 10905 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2022-07-13 09:26:02,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182152977] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:26:02,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:26:02,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106, 106] total 211 [2022-07-13 09:26:02,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955977830] [2022-07-13 09:26:02,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:26:02,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 211 states [2022-07-13 09:26:02,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:26:02,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 211 interpolants. [2022-07-13 09:26:02,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22155, Invalid=22155, Unknown=0, NotChecked=0, Total=44310 [2022-07-13 09:26:02,270 INFO L87 Difference]: Start difference. First operand 312 states and 344 transitions. Second operand has 211 states, 211 states have (on average 2.061611374407583) internal successors, (435), 211 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:26:03,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:26:03,018 INFO L93 Difference]: Finished difference Result 625 states and 793 transitions. [2022-07-13 09:26:03,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2022-07-13 09:26:03,019 INFO L78 Accepts]: Start accepts. Automaton has has 211 states, 211 states have (on average 2.061611374407583) internal successors, (435), 211 states have internal predecessors, (435), 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 268 [2022-07-13 09:26:03,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:26:03,021 INFO L225 Difference]: With dead ends: 625 [2022-07-13 09:26:03,021 INFO L226 Difference]: Without dead ends: 522 [2022-07-13 09:26:03,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=22155, Invalid=22155, Unknown=0, NotChecked=0, Total=44310 [2022-07-13 09:26:03,023 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 208 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 09:26:03,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 192 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 09:26:03,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-07-13 09:26:03,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 522. [2022-07-13 09:26:03,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 1.0633397312859885) internal successors, (554), 521 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:26:03,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 554 transitions. [2022-07-13 09:26:03,034 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 554 transitions. Word has length 268 [2022-07-13 09:26:03,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:26:03,035 INFO L495 AbstractCegarLoop]: Abstraction has 522 states and 554 transitions. [2022-07-13 09:26:03,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 211 states, 211 states have (on average 2.061611374407583) internal successors, (435), 211 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:26:03,035 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 554 transitions. [2022-07-13 09:26:03,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2022-07-13 09:26:03,040 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:26:03,040 INFO L195 NwaCegarLoop]: trace histogram [208, 208, 14, 14, 14, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:26:03,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-13 09:26:03,256 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 [2022-07-13 09:26:03,256 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:26:03,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:26:03,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1936891295, now seen corresponding path program 5 times [2022-07-13 09:26:03,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:26:03,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113078618] [2022-07-13 09:26:03,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:26:03,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:26:03,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:26:15,426 INFO L134 CoverageAnalysis]: Checked inductivity of 43560 backedges. 0 proven. 43264 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2022-07-13 09:26:15,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:26:15,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113078618] [2022-07-13 09:26:15,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113078618] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:26:15,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915750509] [2022-07-13 09:26:15,427 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 09:26:15,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:26:15,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:26:15,428 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) [2022-07-13 09:26:15,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process