./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/bAnd4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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-crafted/bAnd4.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 509fca01259c1f1b00d88cc0da560b766d69c2e05ff96a251a9cfffa2096619e --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 22:35:44,266 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 22:35:44,267 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 22:35:44,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 22:35:44,330 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 22:35:44,331 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 22:35:44,332 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 22:35:44,334 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 22:35:44,335 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 22:35:44,338 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 22:35:44,339 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 22:35:44,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 22:35:44,340 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 22:35:44,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 22:35:44,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 22:35:44,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 22:35:44,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 22:35:44,347 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 22:35:44,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 22:35:44,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 22:35:44,353 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 22:35:44,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 22:35:44,355 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 22:35:44,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 22:35:44,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 22:35:44,361 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 22:35:44,361 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 22:35:44,362 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 22:35:44,362 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 22:35:44,363 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 22:35:44,363 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 22:35:44,364 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 22:35:44,365 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 22:35:44,365 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 22:35:44,366 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 22:35:44,367 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 22:35:44,367 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 22:35:44,367 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 22:35:44,367 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 22:35:44,367 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 22:35:44,369 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 22:35:44,370 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 22:35:44,371 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 22:35:44,398 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 22:35:44,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 22:35:44,399 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 22:35:44,399 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 22:35:44,400 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 22:35:44,400 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 22:35:44,400 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 22:35:44,401 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 22:35:44,401 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 22:35:44,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 22:35:44,402 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 22:35:44,402 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 22:35:44,402 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 22:35:44,402 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 22:35:44,402 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 22:35:44,402 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 22:35:44,402 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 22:35:44,403 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 22:35:44,403 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 22:35:44,403 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 22:35:44,403 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 22:35:44,403 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 22:35:44,403 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 22:35:44,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 22:35:44,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:35:44,404 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 22:35:44,404 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 22:35:44,404 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 22:35:44,404 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 22:35:44,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 22:35:44,405 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 22:35:44,405 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 22:35:44,405 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 22:35:44,405 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 509fca01259c1f1b00d88cc0da560b766d69c2e05ff96a251a9cfffa2096619e [2022-07-11 22:35:44,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 22:35:44,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 22:35:44,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 22:35:44,593 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 22:35:44,595 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 22:35:44,596 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/bAnd4.i [2022-07-11 22:35:44,635 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6f3cd897/bd36c7bf28d8486881d321d12054625b/FLAGf67ac5748 [2022-07-11 22:35:44,986 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 22:35:44,986 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bAnd4.i [2022-07-11 22:35:44,994 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6f3cd897/bd36c7bf28d8486881d321d12054625b/FLAGf67ac5748 [2022-07-11 22:35:45,005 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6f3cd897/bd36c7bf28d8486881d321d12054625b [2022-07-11 22:35:45,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 22:35:45,008 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 22:35:45,010 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 22:35:45,010 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 22:35:45,012 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 22:35:45,013 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:35:45" (1/1) ... [2022-07-11 22:35:45,014 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c469a7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:35:45, skipping insertion in model container [2022-07-11 22:35:45,014 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:35:45" (1/1) ... [2022-07-11 22:35:45,019 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 22:35:45,030 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 22:35:45,200 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-crafted/bAnd4.i[1308,1321] [2022-07-11 22:35:45,202 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:35:45,208 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 22:35:45,233 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-crafted/bAnd4.i[1308,1321] [2022-07-11 22:35:45,234 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:35:45,250 INFO L208 MainTranslator]: Completed translation [2022-07-11 22:35:45,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:35:45 WrapperNode [2022-07-11 22:35:45,251 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 22:35:45,252 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 22:35:45,252 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 22:35:45,252 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 22:35:45,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:35:45" (1/1) ... [2022-07-11 22:35:45,267 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:35:45" (1/1) ... [2022-07-11 22:35:45,284 INFO L137 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-07-11 22:35:45,284 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 22:35:45,285 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 22:35:45,285 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 22:35:45,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 22:35:45,291 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:35:45" (1/1) ... [2022-07-11 22:35:45,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:35:45" (1/1) ... [2022-07-11 22:35:45,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:35:45" (1/1) ... [2022-07-11 22:35:45,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:35:45" (1/1) ... [2022-07-11 22:35:45,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:35:45" (1/1) ... [2022-07-11 22:35:45,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:35:45" (1/1) ... [2022-07-11 22:35:45,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:35:45" (1/1) ... [2022-07-11 22:35:45,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 22:35:45,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 22:35:45,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 22:35:45,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 22:35:45,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:35:45" (1/1) ... [2022-07-11 22:35:45,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:35:45,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:35:45,343 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) [2022-07-11 22:35:45,365 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 [2022-07-11 22:35:45,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 22:35:45,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 22:35:45,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-11 22:35:45,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 22:35:45,376 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2022-07-11 22:35:45,376 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2022-07-11 22:35:45,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 22:35:45,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 22:35:45,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 22:35:45,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-11 22:35:45,421 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 22:35:45,422 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 22:35:45,565 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 22:35:45,569 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 22:35:45,569 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-11 22:35:45,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:35:45 BoogieIcfgContainer [2022-07-11 22:35:45,570 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 22:35:45,572 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 22:35:45,572 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 22:35:45,574 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 22:35:45,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 10:35:45" (1/3) ... [2022-07-11 22:35:45,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1921b3e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:35:45, skipping insertion in model container [2022-07-11 22:35:45,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:35:45" (2/3) ... [2022-07-11 22:35:45,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1921b3e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:35:45, skipping insertion in model container [2022-07-11 22:35:45,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:35:45" (3/3) ... [2022-07-11 22:35:45,576 INFO L111 eAbstractionObserver]: Analyzing ICFG bAnd4.i [2022-07-11 22:35:45,584 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 22:35:45,585 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 22:35:45,612 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 22:35:45,616 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@73406e91, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@b1d500d [2022-07-11 22:35:45,617 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 22:35:45,619 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:35:45,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-11 22:35:45,624 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:35:45,625 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:35:45,625 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:35:45,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:35:45,628 INFO L85 PathProgramCache]: Analyzing trace with hash -565416169, now seen corresponding path program 1 times [2022-07-11 22:35:45,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:35:45,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704045749] [2022-07-11 22:35:45,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:35:45,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:35:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:45,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-11 22:35:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:45,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-11 22:35:45,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:45,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:35:45,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:45,804 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 22:35:45,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:35:45,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704045749] [2022-07-11 22:35:45,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704045749] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:35:45,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:35:45,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 22:35:45,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627124594] [2022-07-11 22:35:45,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:35:45,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 22:35:45,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:35:45,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 22:35:45,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 22:35:45,835 INFO L87 Difference]: Start difference. First operand has 31 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-11 22:35:45,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:35:45,882 INFO L93 Difference]: Finished difference Result 58 states and 83 transitions. [2022-07-11 22:35:45,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 22:35:45,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-07-11 22:35:45,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:35:45,889 INFO L225 Difference]: With dead ends: 58 [2022-07-11 22:35:45,889 INFO L226 Difference]: Without dead ends: 27 [2022-07-11 22:35:45,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 22:35:45,893 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 14 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:35:45,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 56 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:35:45,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-11 22:35:45,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-11 22:35:45,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:35:45,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2022-07-11 22:35:45,915 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 28 [2022-07-11 22:35:45,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:35:45,916 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2022-07-11 22:35:45,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-11 22:35:45,916 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2022-07-11 22:35:45,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-11 22:35:45,918 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:35:45,918 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:35:45,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 22:35:45,918 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:35:45,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:35:45,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1018640069, now seen corresponding path program 1 times [2022-07-11 22:35:45,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:35:45,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071072355] [2022-07-11 22:35:45,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:35:45,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:35:45,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:45,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-11 22:35:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:45,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-11 22:35:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:46,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:35:46,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:46,019 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-11 22:35:46,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:35:46,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071072355] [2022-07-11 22:35:46,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071072355] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:35:46,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89310078] [2022-07-11 22:35:46,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:35:46,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:35:46,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:35:46,026 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) [2022-07-11 22:35:46,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 22:35:46,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:46,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-11 22:35:46,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:35:46,103 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 22:35:46,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 22:35:46,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89310078] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:35:46,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 22:35:46,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-11 22:35:46,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690871397] [2022-07-11 22:35:46,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:35:46,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 22:35:46,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:35:46,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 22:35:46,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-11 22:35:46,107 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-11 22:35:46,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:35:46,114 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-07-11 22:35:46,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 22:35:46,115 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), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-07-11 22:35:46,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:35:46,116 INFO L225 Difference]: With dead ends: 52 [2022-07-11 22:35:46,116 INFO L226 Difference]: Without dead ends: 29 [2022-07-11 22:35:46,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-11 22:35:46,117 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 62 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 [2022-07-11 22:35:46,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 62 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:35:46,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-11 22:35:46,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-07-11 22:35:46,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:35:46,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-07-11 22:35:46,122 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 28 [2022-07-11 22:35:46,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:35:46,122 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-07-11 22:35:46,122 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), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-11 22:35:46,122 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-07-11 22:35:46,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-11 22:35:46,123 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:35:46,123 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:35:46,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-11 22:35:46,328 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 [2022-07-11 22:35:46,329 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:35:46,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:35:46,329 INFO L85 PathProgramCache]: Analyzing trace with hash -497824771, now seen corresponding path program 1 times [2022-07-11 22:35:46,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:35:46,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148151487] [2022-07-11 22:35:46,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:35:46,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:35:46,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:46,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-11 22:35:46,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:46,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-11 22:35:46,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:46,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-11 22:35:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 22:35:46,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:35:46,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148151487] [2022-07-11 22:35:46,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148151487] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:35:46,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476088408] [2022-07-11 22:35:46,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:35:46,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:35:46,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:35:46,419 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) [2022-07-11 22:35:46,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 22:35:46,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:46,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-11 22:35:46,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:35:46,491 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 22:35:46,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 22:35:46,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476088408] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:35:46,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 22:35:46,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-11 22:35:46,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067463415] [2022-07-11 22:35:46,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:35:46,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 22:35:46,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:35:46,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 22:35:46,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-11 22:35:46,498 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 22:35:46,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:35:46,505 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2022-07-11 22:35:46,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 22:35:46,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-07-11 22:35:46,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:35:46,507 INFO L225 Difference]: With dead ends: 57 [2022-07-11 22:35:46,507 INFO L226 Difference]: Without dead ends: 35 [2022-07-11 22:35:46,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-11 22:35:46,508 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 62 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 [2022-07-11 22:35:46,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 62 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:35:46,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-11 22:35:46,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2022-07-11 22:35:46,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:35:46,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-07-11 22:35:46,512 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 30 [2022-07-11 22:35:46,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:35:46,512 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-07-11 22:35:46,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 22:35:46,513 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-07-11 22:35:46,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-11 22:35:46,514 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:35:46,514 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:35:46,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-11 22:35:46,723 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 [2022-07-11 22:35:46,724 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:35:46,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:35:46,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1532793032, now seen corresponding path program 1 times [2022-07-11 22:35:46,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:35:46,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828985254] [2022-07-11 22:35:46,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:35:46,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:35:46,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:46,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-11 22:35:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:46,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 22:35:46,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:46,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-11 22:35:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 22:35:46,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:35:46,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828985254] [2022-07-11 22:35:46,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828985254] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:35:46,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325345212] [2022-07-11 22:35:46,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:35:46,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:35:46,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:35:46,828 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) [2022-07-11 22:35:46,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 22:35:46,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:46,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-11 22:35:46,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:35:46,916 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 22:35:46,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 22:35:46,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325345212] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:35:46,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 22:35:46,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-11 22:35:46,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232847468] [2022-07-11 22:35:46,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:35:46,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 22:35:46,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:35:46,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 22:35:46,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-11 22:35:46,922 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 22:35:46,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:35:46,935 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2022-07-11 22:35:46,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 22:35:46,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-07-11 22:35:46,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:35:46,944 INFO L225 Difference]: With dead ends: 49 [2022-07-11 22:35:46,944 INFO L226 Difference]: Without dead ends: 31 [2022-07-11 22:35:46,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-11 22:35:46,945 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:35:46,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 61 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:35:46,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-11 22:35:46,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-07-11 22:35:46,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:35:46,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-07-11 22:35:46,949 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 42 [2022-07-11 22:35:46,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:35:46,950 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-07-11 22:35:46,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 22:35:46,950 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-07-11 22:35:46,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-11 22:35:46,951 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:35:46,951 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:35:46,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-11 22:35:47,153 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 [2022-07-11 22:35:47,154 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:35:47,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:35:47,154 INFO L85 PathProgramCache]: Analyzing trace with hash 164449686, now seen corresponding path program 1 times [2022-07-11 22:35:47,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:35:47,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624568099] [2022-07-11 22:35:47,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:35:47,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:35:47,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:47,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-11 22:35:47,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:47,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 22:35:47,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:47,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 22:35:47,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:47,236 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-11 22:35:47,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:35:47,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624568099] [2022-07-11 22:35:47,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624568099] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:35:47,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351588759] [2022-07-11 22:35:47,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:35:47,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:35:47,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:35:47,245 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) [2022-07-11 22:35:47,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-11 22:35:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:47,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-11 22:35:47,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:35:47,319 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-11 22:35:47,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:35:47,350 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-11 22:35:47,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351588759] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:35:47,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:35:47,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 10 [2022-07-11 22:35:47,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607763351] [2022-07-11 22:35:47,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:35:47,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-11 22:35:47,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:35:47,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-11 22:35:47,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-07-11 22:35:47,352 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-11 22:35:47,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:35:47,420 INFO L93 Difference]: Finished difference Result 74 states and 100 transitions. [2022-07-11 22:35:47,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 22:35:47,420 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 44 [2022-07-11 22:35:47,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:35:47,421 INFO L225 Difference]: With dead ends: 74 [2022-07-11 22:35:47,421 INFO L226 Difference]: Without dead ends: 49 [2022-07-11 22:35:47,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-07-11 22:35:47,422 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 62 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:35:47,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 106 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:35:47,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-11 22:35:47,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2022-07-11 22:35:47,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.236842105263158) internal successors, (47), 38 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:35:47,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2022-07-11 22:35:47,428 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 44 [2022-07-11 22:35:47,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:35:47,428 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2022-07-11 22:35:47,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-11 22:35:47,429 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2022-07-11 22:35:47,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-11 22:35:47,430 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:35:47,430 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:35:47,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-11 22:35:47,635 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 [2022-07-11 22:35:47,635 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:35:47,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:35:47,636 INFO L85 PathProgramCache]: Analyzing trace with hash -724622569, now seen corresponding path program 2 times [2022-07-11 22:35:47,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:35:47,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230343841] [2022-07-11 22:35:47,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:35:47,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:35:47,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:47,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-11 22:35:47,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:47,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-11 22:35:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:47,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-11 22:35:47,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:47,720 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-11 22:35:47,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:35:47,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230343841] [2022-07-11 22:35:47,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230343841] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:35:47,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534091151] [2022-07-11 22:35:47,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:35:47,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:35:47,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:35:47,722 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) [2022-07-11 22:35:47,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-11 22:35:47,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:35:47,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:35:47,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-11 22:35:47,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:35:47,845 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-07-11 22:35:47,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:35:47,914 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-07-11 22:35:47,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534091151] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:35:47,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:35:47,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-07-11 22:35:47,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846000153] [2022-07-11 22:35:47,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:35:47,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-11 22:35:47,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:35:47,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-11 22:35:47,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-07-11 22:35:47,916 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-11 22:35:47,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:35:47,974 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2022-07-11 22:35:47,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-11 22:35:47,976 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2022-07-11 22:35:47,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:35:47,979 INFO L225 Difference]: With dead ends: 90 [2022-07-11 22:35:47,979 INFO L226 Difference]: Without dead ends: 58 [2022-07-11 22:35:47,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-07-11 22:35:47,984 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 26 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:35:47,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 178 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:35:47,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-11 22:35:47,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-07-11 22:35:47,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 52 states have internal predecessors, (61), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:35:47,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-07-11 22:35:47,995 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 62 [2022-07-11 22:35:47,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:35:47,996 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-07-11 22:35:47,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-11 22:35:47,997 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-07-11 22:35:47,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-11 22:35:47,998 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:35:47,998 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:35:48,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-11 22:35:48,214 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 [2022-07-11 22:35:48,215 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:35:48,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:35:48,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1424970623, now seen corresponding path program 3 times [2022-07-11 22:35:48,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:35:48,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082840006] [2022-07-11 22:35:48,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:35:48,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:35:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:48,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 22:35:48,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:48,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-11 22:35:48,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:48,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-11 22:35:48,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:48,299 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-07-11 22:35:48,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:35:48,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082840006] [2022-07-11 22:35:48,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082840006] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:35:48,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554465572] [2022-07-11 22:35:48,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 22:35:48,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:35:48,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:35:48,301 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) [2022-07-11 22:35:48,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-11 22:35:48,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-11 22:35:48,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:35:48,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-11 22:35:48,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:35:48,380 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-07-11 22:35:48,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:35:48,413 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-07-11 22:35:48,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554465572] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:35:48,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:35:48,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-07-11 22:35:48,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081582079] [2022-07-11 22:35:48,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:35:48,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 22:35:48,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:35:48,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 22:35:48,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-07-11 22:35:48,415 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:35:48,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:35:48,470 INFO L93 Difference]: Finished difference Result 118 states and 155 transitions. [2022-07-11 22:35:48,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 22:35:48,471 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 76 [2022-07-11 22:35:48,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:35:48,472 INFO L225 Difference]: With dead ends: 118 [2022-07-11 22:35:48,472 INFO L226 Difference]: Without dead ends: 85 [2022-07-11 22:35:48,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-07-11 22:35:48,473 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 182 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:35:48,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 108 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:35:48,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-11 22:35:48,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-07-11 22:35:48,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.2625) internal successors, (101), 80 states have internal predecessors, (101), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:35:48,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2022-07-11 22:35:48,478 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 76 [2022-07-11 22:35:48,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:35:48,479 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2022-07-11 22:35:48,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:35:48,479 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2022-07-11 22:35:48,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-11 22:35:48,480 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:35:48,480 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:35:48,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-11 22:35:48,696 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 [2022-07-11 22:35:48,697 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:35:48,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:35:48,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1349373549, now seen corresponding path program 4 times [2022-07-11 22:35:48,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:35:48,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16902062] [2022-07-11 22:35:48,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:35:48,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:35:48,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:48,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 22:35:48,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:48,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-11 22:35:48,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:48,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-11 22:35:48,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:48,837 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-07-11 22:35:48,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:35:48,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16902062] [2022-07-11 22:35:48,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16902062] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:35:48,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14066536] [2022-07-11 22:35:48,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 22:35:48,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:35:48,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:35:48,845 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) [2022-07-11 22:35:48,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-11 22:35:48,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 22:35:48,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:35:48,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-11 22:35:48,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:35:48,983 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-07-11 22:35:48,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:35:49,144 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-07-11 22:35:49,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14066536] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:35:49,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:35:49,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-07-11 22:35:49,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874871049] [2022-07-11 22:35:49,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:35:49,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-11 22:35:49,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:35:49,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-11 22:35:49,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-07-11 22:35:49,147 INFO L87 Difference]: Start difference. First operand 85 states and 107 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-11 22:35:49,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:35:49,202 INFO L93 Difference]: Finished difference Result 171 states and 226 transitions. [2022-07-11 22:35:49,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-11 22:35:49,203 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 124 [2022-07-11 22:35:49,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:35:49,203 INFO L225 Difference]: With dead ends: 171 [2022-07-11 22:35:49,203 INFO L226 Difference]: Without dead ends: 109 [2022-07-11 22:35:49,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-07-11 22:35:49,205 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 47 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:35:49,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 164 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:35:49,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-07-11 22:35:49,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-07-11 22:35:49,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.2019230769230769) internal successors, (125), 104 states have internal predecessors, (125), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:35:49,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 131 transitions. [2022-07-11 22:35:49,210 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 131 transitions. Word has length 124 [2022-07-11 22:35:49,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:35:49,210 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 131 transitions. [2022-07-11 22:35:49,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-11 22:35:49,211 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 131 transitions. [2022-07-11 22:35:49,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-07-11 22:35:49,212 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:35:49,212 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 18, 18, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:35:49,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-11 22:35:49,425 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 [2022-07-11 22:35:49,426 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:35:49,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:35:49,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1124916869, now seen corresponding path program 5 times [2022-07-11 22:35:49,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:35:49,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195911836] [2022-07-11 22:35:49,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:35:49,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:35:49,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:49,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 22:35:49,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:49,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-11 22:35:49,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:49,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-07-11 22:35:49,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:49,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-07-11 22:35:49,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:35:49,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195911836] [2022-07-11 22:35:49,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195911836] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:35:49,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135973105] [2022-07-11 22:35:49,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 22:35:49,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:35:49,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:35:49,703 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) [2022-07-11 22:35:49,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-11 22:35:50,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-07-11 22:35:50,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:35:50,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-11 22:35:50,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:35:50,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 316 proven. 66 refuted. 0 times theorem prover too weak. 787 trivial. 0 not checked. [2022-07-11 22:35:50,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:35:50,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 0 proven. 386 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2022-07-11 22:35:50,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135973105] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:35:50,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:35:50,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9, 9] total 40 [2022-07-11 22:35:50,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365088692] [2022-07-11 22:35:50,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:35:50,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-11 22:35:50,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:35:50,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-11 22:35:50,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1139, Unknown=0, NotChecked=0, Total=1560 [2022-07-11 22:35:50,909 INFO L87 Difference]: Start difference. First operand 109 states and 131 transitions. Second operand has 40 states, 40 states have (on average 3.225) internal successors, (129), 39 states have internal predecessors, (129), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:35:51,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:35:51,192 INFO L93 Difference]: Finished difference Result 230 states and 309 transitions. [2022-07-11 22:35:51,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-11 22:35:51,193 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.225) internal successors, (129), 39 states have internal predecessors, (129), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 148 [2022-07-11 22:35:51,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:35:51,194 INFO L225 Difference]: With dead ends: 230 [2022-07-11 22:35:51,194 INFO L226 Difference]: Without dead ends: 168 [2022-07-11 22:35:51,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=659, Invalid=2203, Unknown=0, NotChecked=0, Total=2862 [2022-07-11 22:35:51,196 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 403 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:35:51,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 346 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:35:51,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-11 22:35:51,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2022-07-11 22:35:51,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.2777777777777777) internal successors, (207), 162 states have internal predecessors, (207), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:35:51,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 213 transitions. [2022-07-11 22:35:51,203 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 213 transitions. Word has length 148 [2022-07-11 22:35:51,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:35:51,203 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 213 transitions. [2022-07-11 22:35:51,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.225) internal successors, (129), 39 states have internal predecessors, (129), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:35:51,204 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 213 transitions. [2022-07-11 22:35:51,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-07-11 22:35:51,205 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:35:51,205 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 42, 23, 23, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:35:51,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-11 22:35:51,440 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 [2022-07-11 22:35:51,440 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:35:51,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:35:51,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1940002591, now seen corresponding path program 6 times [2022-07-11 22:35:51,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:35:51,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757639237] [2022-07-11 22:35:51,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:35:51,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:35:51,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:51,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-11 22:35:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:51,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-07-11 22:35:51,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:51,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-07-11 22:35:51,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:51,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 3589 trivial. 0 not checked. [2022-07-11 22:35:51,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:35:51,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757639237] [2022-07-11 22:35:51,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757639237] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:35:51,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18323477] [2022-07-11 22:35:51,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 22:35:51,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:35:51,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:35:51,731 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) [2022-07-11 22:35:51,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-11 22:35:51,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-11 22:35:51,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:35:51,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-11 22:35:51,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:35:51,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 1634 proven. 4 refuted. 0 times theorem prover too weak. 2480 trivial. 0 not checked. [2022-07-11 22:35:51,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:35:51,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4114 trivial. 0 not checked. [2022-07-11 22:35:51,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18323477] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:35:51,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:35:51,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 5, 5] total 33 [2022-07-11 22:35:51,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714145374] [2022-07-11 22:35:51,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:35:51,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-11 22:35:51,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:35:51,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-11 22:35:51,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=702, Unknown=0, NotChecked=0, Total=1056 [2022-07-11 22:35:51,916 INFO L87 Difference]: Start difference. First operand 167 states and 213 transitions. Second operand has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 32 states have internal predecessors, (92), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:35:51,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:35:51,999 INFO L93 Difference]: Finished difference Result 296 states and 392 transitions. [2022-07-11 22:35:52,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-11 22:35:52,000 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 32 states have internal predecessors, (92), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 246 [2022-07-11 22:35:52,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:35:52,001 INFO L225 Difference]: With dead ends: 296 [2022-07-11 22:35:52,001 INFO L226 Difference]: Without dead ends: 178 [2022-07-11 22:35:52,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=354, Invalid=702, Unknown=0, NotChecked=0, Total=1056 [2022-07-11 22:35:52,002 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 47 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:35:52,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 233 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:35:52,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-07-11 22:35:52,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2022-07-11 22:35:52,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.2616279069767442) internal successors, (217), 172 states have internal predecessors, (217), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:35:52,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 223 transitions. [2022-07-11 22:35:52,010 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 223 transitions. Word has length 246 [2022-07-11 22:35:52,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:35:52,010 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 223 transitions. [2022-07-11 22:35:52,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 32 states have internal predecessors, (92), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:35:52,011 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 223 transitions. [2022-07-11 22:35:52,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2022-07-11 22:35:52,012 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:35:52,013 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 42, 24, 24, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:35:52,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-11 22:35:52,229 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 [2022-07-11 22:35:52,230 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:35:52,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:35:52,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1867095591, now seen corresponding path program 7 times [2022-07-11 22:35:52,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:35:52,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235150494] [2022-07-11 22:35:52,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:35:52,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:35:52,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:52,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-11 22:35:52,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:52,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-11 22:35:52,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:52,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-07-11 22:35:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:52,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-07-11 22:35:52,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:35:52,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235150494] [2022-07-11 22:35:52,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235150494] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:35:52,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969246344] [2022-07-11 22:35:52,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 22:35:52,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:35:52,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:35:52,568 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) [2022-07-11 22:35:52,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-11 22:35:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:52,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-11 22:35:52,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:35:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-07-11 22:35:52,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:35:53,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-07-11 22:35:53,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969246344] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:35:53,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:35:53,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-07-11 22:35:53,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462947964] [2022-07-11 22:35:53,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:35:53,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-11 22:35:53,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:35:53,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-11 22:35:53,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-07-11 22:35:53,450 INFO L87 Difference]: Start difference. First operand 177 states and 223 transitions. Second operand has 54 states, 54 states have (on average 2.4074074074074074) internal successors, (130), 53 states have internal predecessors, (130), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-11 22:35:53,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:35:53,555 INFO L93 Difference]: Finished difference Result 355 states and 472 transitions. [2022-07-11 22:35:53,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-11 22:35:53,556 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.4074074074074074) internal successors, (130), 53 states have internal predecessors, (130), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 256 [2022-07-11 22:35:53,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:35:53,557 INFO L225 Difference]: With dead ends: 355 [2022-07-11 22:35:53,557 INFO L226 Difference]: Without dead ends: 229 [2022-07-11 22:35:53,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-07-11 22:35:53,559 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 64 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:35:53,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 194 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:35:53,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-07-11 22:35:53,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-07-11 22:35:53,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.2008928571428572) internal successors, (269), 224 states have internal predecessors, (269), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:35:53,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 275 transitions. [2022-07-11 22:35:53,565 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 275 transitions. Word has length 256 [2022-07-11 22:35:53,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:35:53,566 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 275 transitions. [2022-07-11 22:35:53,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.4074074074074074) internal successors, (130), 53 states have internal predecessors, (130), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-11 22:35:53,566 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 275 transitions. [2022-07-11 22:35:53,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-07-11 22:35:53,568 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:35:53,568 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 42, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:35:53,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-11 22:35:53,791 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 [2022-07-11 22:35:53,791 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:35:53,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:35:53,792 INFO L85 PathProgramCache]: Analyzing trace with hash 316429581, now seen corresponding path program 8 times [2022-07-11 22:35:53,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:35:53,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781888291] [2022-07-11 22:35:53,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:35:53,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:35:53,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:54,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-11 22:35:54,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:54,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-07-11 22:35:54,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:54,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 243 [2022-07-11 22:35:54,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:35:54,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-07-11 22:35:54,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:35:54,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781888291] [2022-07-11 22:35:54,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781888291] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:35:54,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599167072] [2022-07-11 22:35:54,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:35:54,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:35:54,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:35:54,774 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) [2022-07-11 22:35:54,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-11 22:35:54,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:35:54,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:35:54,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 1087 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-11 22:35:54,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:35:55,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-07-11 22:35:55,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:35:57,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-07-11 22:35:57,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599167072] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:35:57,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:35:57,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 106 [2022-07-11 22:35:57,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130096306] [2022-07-11 22:35:57,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:35:57,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-07-11 22:35:57,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:35:57,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-07-11 22:35:57,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-07-11 22:35:57,534 INFO L87 Difference]: Start difference. First operand 229 states and 275 transitions. Second operand has 106 states, 106 states have (on average 2.207547169811321) internal successors, (234), 105 states have internal predecessors, (234), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-11 22:35:57,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:35:57,767 INFO L93 Difference]: Finished difference Result 459 states and 602 transitions. [2022-07-11 22:35:57,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-07-11 22:35:57,768 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.207547169811321) internal successors, (234), 105 states have internal predecessors, (234), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 308 [2022-07-11 22:35:57,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:35:57,769 INFO L225 Difference]: With dead ends: 459 [2022-07-11 22:35:57,769 INFO L226 Difference]: Without dead ends: 333 [2022-07-11 22:35:57,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 569 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-07-11 22:35:57,772 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 116 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 22:35:57,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 164 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 22:35:57,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-07-11 22:35:57,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2022-07-11 22:35:57,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 328 states have (on average 1.1371951219512195) internal successors, (373), 328 states have internal predecessors, (373), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:35:57,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 379 transitions. [2022-07-11 22:35:57,780 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 379 transitions. Word has length 308 [2022-07-11 22:35:57,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:35:57,781 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 379 transitions. [2022-07-11 22:35:57,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.207547169811321) internal successors, (234), 105 states have internal predecessors, (234), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-11 22:35:57,781 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 379 transitions. [2022-07-11 22:35:57,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2022-07-11 22:35:57,785 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:35:57,785 INFO L195 NwaCegarLoop]: trace histogram [102, 102, 42, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:35:57,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-11 22:35:57,995 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 [2022-07-11 22:35:57,995 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:35:57,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:35:57,996 INFO L85 PathProgramCache]: Analyzing trace with hash 727115125, now seen corresponding path program 9 times [2022-07-11 22:35:57,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:35:57,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078240424] [2022-07-11 22:35:57,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:35:57,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:35:58,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:36:01,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-07-11 22:36:01,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:36:01,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 270 [2022-07-11 22:36:01,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:36:01,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 347 [2022-07-11 22:36:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:36:01,133 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-07-11 22:36:01,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:36:01,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078240424] [2022-07-11 22:36:01,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078240424] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:36:01,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803693032] [2022-07-11 22:36:01,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 22:36:01,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:36:01,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:36:01,144 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) [2022-07-11 22:36:01,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-11 22:36:01,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-11 22:36:01,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:36:01,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-11 22:36:01,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:36:01,606 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 1634 proven. 36 refuted. 0 times theorem prover too weak. 12355 trivial. 0 not checked. [2022-07-11 22:36:01,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:36:01,894 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 13989 trivial. 0 not checked. [2022-07-11 22:36:01,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803693032] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:36:01,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:36:01,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 9, 9] total 120 [2022-07-11 22:36:01,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225447127] [2022-07-11 22:36:01,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:36:01,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-07-11 22:36:01,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:36:01,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-07-11 22:36:01,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5581, Invalid=8699, Unknown=0, NotChecked=0, Total=14280 [2022-07-11 22:36:01,908 INFO L87 Difference]: Start difference. First operand 333 states and 379 transitions. Second operand has 120 states, 120 states have (on average 2.216666666666667) internal successors, (266), 119 states have internal predecessors, (266), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:36:02,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:36:02,159 INFO L93 Difference]: Finished difference Result 478 states and 578 transitions. [2022-07-11 22:36:02,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-07-11 22:36:02,159 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.216666666666667) internal successors, (266), 119 states have internal predecessors, (266), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 412 [2022-07-11 22:36:02,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:36:02,161 INFO L225 Difference]: With dead ends: 478 [2022-07-11 22:36:02,161 INFO L226 Difference]: Without dead ends: 352 [2022-07-11 22:36:02,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 933 GetRequests, 815 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5581, Invalid=8699, Unknown=0, NotChecked=0, Total=14280 [2022-07-11 22:36:02,164 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 131 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 22:36:02,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 316 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 22:36:02,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-07-11 22:36:02,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 351. [2022-07-11 22:36:02,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 346 states have (on average 1.130057803468208) internal successors, (391), 346 states have internal predecessors, (391), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:36:02,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 397 transitions. [2022-07-11 22:36:02,171 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 397 transitions. Word has length 412 [2022-07-11 22:36:02,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:36:02,172 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 397 transitions. [2022-07-11 22:36:02,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.216666666666667) internal successors, (266), 119 states have internal predecessors, (266), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:36:02,172 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 397 transitions. [2022-07-11 22:36:02,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2022-07-11 22:36:02,174 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:36:02,174 INFO L195 NwaCegarLoop]: trace histogram [103, 103, 42, 42, 42, 42, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:36:02,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-11 22:36:02,387 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 [2022-07-11 22:36:02,387 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:36:02,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:36:02,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1691242201, now seen corresponding path program 10 times [2022-07-11 22:36:02,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:36:02,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331942757] [2022-07-11 22:36:02,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:36:02,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:36:02,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:36:05,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2022-07-11 22:36:05,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:36:05,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2022-07-11 22:36:05,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:36:05,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 365 [2022-07-11 22:36:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:36:05,617 INFO L134 CoverageAnalysis]: Checked inductivity of 14390 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 3781 trivial. 0 not checked. [2022-07-11 22:36:05,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:36:05,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331942757] [2022-07-11 22:36:05,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331942757] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:36:05,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577704944] [2022-07-11 22:36:05,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 22:36:05,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:36:05,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:36:05,619 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) [2022-07-11 22:36:05,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-11 22:36:05,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 22:36:05,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:36:05,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 1620 conjuncts, 105 conjunts are in the unsatisfiable core [2022-07-11 22:36:05,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:36:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 14390 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 3781 trivial. 0 not checked. [2022-07-11 22:36:06,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:36:15,130 INFO L134 CoverageAnalysis]: Checked inductivity of 14390 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 3781 trivial. 0 not checked. [2022-07-11 22:36:15,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577704944] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:36:15,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:36:15,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 106, 106] total 212 [2022-07-11 22:36:15,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699620027] [2022-07-11 22:36:15,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:36:15,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 212 states [2022-07-11 22:36:15,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:36:15,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 212 interpolants. [2022-07-11 22:36:15,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22157, Invalid=22575, Unknown=0, NotChecked=0, Total=44732 [2022-07-11 22:36:15,139 INFO L87 Difference]: Start difference. First operand 351 states and 397 transitions. Second operand has 212 states, 212 states have (on average 2.1037735849056602) internal successors, (446), 211 states have internal predecessors, (446), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-11 22:36:15,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:36:15,842 INFO L93 Difference]: Finished difference Result 703 states and 899 transitions. [2022-07-11 22:36:15,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2022-07-11 22:36:15,843 INFO L78 Accepts]: Start accepts. Automaton has has 212 states, 212 states have (on average 2.1037735849056602) internal successors, (446), 211 states have internal predecessors, (446), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 430 [2022-07-11 22:36:15,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:36:15,845 INFO L225 Difference]: With dead ends: 703 [2022-07-11 22:36:15,845 INFO L226 Difference]: Without dead ends: 561 [2022-07-11 22:36:15,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 970 GetRequests, 760 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=22157, Invalid=22575, Unknown=0, NotChecked=0, Total=44732 [2022-07-11 22:36:15,848 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 222 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 22:36:15,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 284 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-11 22:36:15,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-07-11 22:36:15,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 561. [2022-07-11 22:36:15,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 556 states have (on average 1.080935251798561) internal successors, (601), 556 states have internal predecessors, (601), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:36:15,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 607 transitions. [2022-07-11 22:36:15,858 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 607 transitions. Word has length 430 [2022-07-11 22:36:15,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:36:15,859 INFO L495 AbstractCegarLoop]: Abstraction has 561 states and 607 transitions. [2022-07-11 22:36:15,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 212 states, 212 states have (on average 2.1037735849056602) internal successors, (446), 211 states have internal predecessors, (446), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-11 22:36:15,859 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 607 transitions. [2022-07-11 22:36:15,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2022-07-11 22:36:15,862 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:36:15,863 INFO L195 NwaCegarLoop]: trace histogram [208, 208, 42, 42, 42, 42, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:36:15,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-11 22:36:16,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-11 22:36:16,081 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:36:16,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:36:16,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1870976967, now seen corresponding path program 11 times [2022-07-11 22:36:16,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:36:16,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575962557] [2022-07-11 22:36:16,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:36:16,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:36:16,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:36:27,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 419 [2022-07-11 22:36:27,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:36:27,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 482 [2022-07-11 22:36:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:36:27,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 575 [2022-07-11 22:36:27,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:36:27,956 INFO L134 CoverageAnalysis]: Checked inductivity of 47045 backedges. 0 proven. 43264 refuted. 0 times theorem prover too weak. 3781 trivial. 0 not checked. [2022-07-11 22:36:27,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:36:27,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575962557] [2022-07-11 22:36:27,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575962557] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:36:27,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010504567] [2022-07-11 22:36:27,957 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 22:36:27,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:36:27,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:36:27,958 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:36:27,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process