./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array28_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c 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-patterns/array28_pattern.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8b49bb3ea989868d96c18ff859c95dc74ebb805f64994c11617c2c5b61c8e87f --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-16 23:44:11,262 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 23:44:11,263 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 23:44:11,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 23:44:11,281 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 23:44:11,282 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 23:44:11,282 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 23:44:11,283 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 23:44:11,285 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 23:44:11,285 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 23:44:11,286 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 23:44:11,287 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 23:44:11,287 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 23:44:11,288 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 23:44:11,288 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 23:44:11,289 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 23:44:11,290 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 23:44:11,290 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 23:44:11,291 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 23:44:11,293 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 23:44:11,295 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 23:44:11,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 23:44:11,297 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 23:44:11,300 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 23:44:11,302 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 23:44:11,304 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 23:44:11,305 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 23:44:11,305 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 23:44:11,305 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 23:44:11,306 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 23:44:11,306 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 23:44:11,307 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 23:44:11,308 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 23:44:11,309 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 23:44:11,310 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 23:44:11,310 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 23:44:11,311 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 23:44:11,311 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 23:44:11,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 23:44:11,312 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 23:44:11,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 23:44:11,314 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-16 23:44:11,327 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 23:44:11,332 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 23:44:11,332 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 23:44:11,332 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 23:44:11,333 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 23:44:11,333 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 23:44:11,334 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 23:44:11,334 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 23:44:11,334 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 23:44:11,335 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 23:44:11,335 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 23:44:11,335 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 23:44:11,336 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 23:44:11,336 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 23:44:11,336 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 23:44:11,336 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 23:44:11,336 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 23:44:11,336 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 23:44:11,336 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 23:44:11,337 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 23:44:11,337 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 23:44:11,337 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 23:44:11,337 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 23:44:11,337 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 23:44:11,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 23:44:11,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 23:44:11,338 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 23:44:11,338 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 23:44:11,338 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 23:44:11,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 23:44:11,339 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 23:44:11,339 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 23:44:11,339 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 23:44:11,339 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 23:44:11,339 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 23:44:11,339 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8b49bb3ea989868d96c18ff859c95dc74ebb805f64994c11617c2c5b61c8e87f [2023-02-16 23:44:11,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 23:44:11,534 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 23:44:11,536 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 23:44:11,536 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 23:44:11,540 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 23:44:11,541 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array28_pattern.c [2023-02-16 23:44:12,539 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 23:44:12,729 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 23:44:12,730 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array28_pattern.c [2023-02-16 23:44:12,734 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/382aed8b1/c2326f191dfb408d8065d246cc5124d8/FLAG734c67bb5 [2023-02-16 23:44:12,748 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/382aed8b1/c2326f191dfb408d8065d246cc5124d8 [2023-02-16 23:44:12,750 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 23:44:12,751 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 23:44:12,753 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 23:44:12,753 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 23:44:12,756 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 23:44:12,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 11:44:12" (1/1) ... [2023-02-16 23:44:12,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38d023b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:44:12, skipping insertion in model container [2023-02-16 23:44:12,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 11:44:12" (1/1) ... [2023-02-16 23:44:12,763 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 23:44:12,778 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 23:44:12,896 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array28_pattern.c[1246,1259] [2023-02-16 23:44:12,912 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 23:44:12,919 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 23:44:12,929 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array28_pattern.c[1246,1259] [2023-02-16 23:44:12,934 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 23:44:12,943 INFO L208 MainTranslator]: Completed translation [2023-02-16 23:44:12,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:44:12 WrapperNode [2023-02-16 23:44:12,944 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 23:44:12,945 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 23:44:12,945 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 23:44:12,945 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 23:44:12,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:44:12" (1/1) ... [2023-02-16 23:44:12,961 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:44:12" (1/1) ... [2023-02-16 23:44:12,973 INFO L138 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2023-02-16 23:44:12,974 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 23:44:12,975 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 23:44:12,975 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 23:44:12,975 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 23:44:12,980 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:44:12" (1/1) ... [2023-02-16 23:44:12,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:44:12" (1/1) ... [2023-02-16 23:44:12,990 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:44:12" (1/1) ... [2023-02-16 23:44:12,990 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:44:12" (1/1) ... [2023-02-16 23:44:12,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:44:12" (1/1) ... [2023-02-16 23:44:12,996 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:44:12" (1/1) ... [2023-02-16 23:44:13,000 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:44:12" (1/1) ... [2023-02-16 23:44:13,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:44:12" (1/1) ... [2023-02-16 23:44:13,001 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 23:44:13,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 23:44:13,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 23:44:13,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 23:44:13,003 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:44:12" (1/1) ... [2023-02-16 23:44:13,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 23:44:13,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:44:13,024 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-16 23:44:13,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-16 23:44:13,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 23:44:13,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 23:44:13,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-16 23:44:13,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-16 23:44:13,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 23:44:13,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 23:44:13,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-16 23:44:13,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-16 23:44:13,120 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 23:44:13,121 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 23:44:13,246 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 23:44:13,250 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 23:44:13,264 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-16 23:44:13,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 11:44:13 BoogieIcfgContainer [2023-02-16 23:44:13,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 23:44:13,268 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 23:44:13,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 23:44:13,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 23:44:13,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 11:44:12" (1/3) ... [2023-02-16 23:44:13,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c53e525 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 11:44:13, skipping insertion in model container [2023-02-16 23:44:13,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:44:12" (2/3) ... [2023-02-16 23:44:13,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c53e525 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 11:44:13, skipping insertion in model container [2023-02-16 23:44:13,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 11:44:13" (3/3) ... [2023-02-16 23:44:13,272 INFO L112 eAbstractionObserver]: Analyzing ICFG array28_pattern.c [2023-02-16 23:44:13,282 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 23:44:13,282 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-16 23:44:13,309 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 23:44:13,316 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4324c448, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 23:44:13,317 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-16 23:44:13,320 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:13,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-16 23:44:13,323 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:44:13,324 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:44:13,324 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:44:13,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:44:13,327 INFO L85 PathProgramCache]: Analyzing trace with hash -320975489, now seen corresponding path program 1 times [2023-02-16 23:44:13,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:44:13,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424547048] [2023-02-16 23:44:13,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:44:13,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:44:13,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:44:13,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:44:13,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424547048] [2023-02-16 23:44:13,422 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-16 23:44:13,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25188056] [2023-02-16 23:44:13,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:44:13,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:44:13,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:44:13,426 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:44:13,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 23:44:13,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:44:13,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-16 23:44:13,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:44:13,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 23:44:13,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 23:44:13,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25188056] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 23:44:13,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 23:44:13,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 23:44:13,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653643733] [2023-02-16 23:44:13,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 23:44:13,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-16 23:44:13,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:44:13,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-16 23:44:13,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 23:44:13,547 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:13,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:44:13,557 INFO L93 Difference]: Finished difference Result 43 states and 64 transitions. [2023-02-16 23:44:13,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-16 23:44:13,558 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-16 23:44:13,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:44:13,562 INFO L225 Difference]: With dead ends: 43 [2023-02-16 23:44:13,562 INFO L226 Difference]: Without dead ends: 19 [2023-02-16 23:44:13,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 23:44:13,566 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 23:44:13,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 23:44:13,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-16 23:44:13,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-02-16 23:44:13,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:13,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2023-02-16 23:44:13,585 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2023-02-16 23:44:13,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:44:13,586 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2023-02-16 23:44:13,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:13,586 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2023-02-16 23:44:13,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-16 23:44:13,586 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:44:13,587 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:44:13,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-16 23:44:13,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-16 23:44:13,791 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:44:13,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:44:13,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1931938343, now seen corresponding path program 1 times [2023-02-16 23:44:13,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:44:13,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351526570] [2023-02-16 23:44:13,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:44:13,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:44:13,813 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 23:44:13,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1502704686] [2023-02-16 23:44:13,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:44:13,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:44:13,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:44:13,832 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:44:13,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 23:44:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:44:13,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-16 23:44:13,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:44:13,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 23:44:13,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 23:44:13,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:44:13,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351526570] [2023-02-16 23:44:13,889 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 23:44:13,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502704686] [2023-02-16 23:44:13,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502704686] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 23:44:13,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 23:44:13,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 23:44:13,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008871588] [2023-02-16 23:44:13,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 23:44:13,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 23:44:13,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:44:13,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 23:44:13,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 23:44:13,891 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:13,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:44:13,904 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2023-02-16 23:44:13,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 23:44:13,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-16 23:44:13,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:44:13,905 INFO L225 Difference]: With dead ends: 26 [2023-02-16 23:44:13,905 INFO L226 Difference]: Without dead ends: 22 [2023-02-16 23:44:13,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-16 23:44:13,906 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 23:44:13,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 52 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 23:44:13,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-16 23:44:13,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-16 23:44:13,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:13,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2023-02-16 23:44:13,910 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 10 [2023-02-16 23:44:13,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:44:13,910 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2023-02-16 23:44:13,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:13,911 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2023-02-16 23:44:13,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-16 23:44:13,911 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:44:13,911 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:44:13,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 23:44:14,115 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,SelfDestructingSolverStorable1 [2023-02-16 23:44:14,116 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:44:14,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:44:14,117 INFO L85 PathProgramCache]: Analyzing trace with hash -94215630, now seen corresponding path program 1 times [2023-02-16 23:44:14,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:44:14,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212746299] [2023-02-16 23:44:14,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:44:14,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:44:14,126 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 23:44:14,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1033605167] [2023-02-16 23:44:14,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:44:14,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:44:14,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:44:14,128 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:44:14,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 23:44:14,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:44:14,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-16 23:44:14,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:44:14,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 23:44:14,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 23:44:14,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:44:14,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212746299] [2023-02-16 23:44:14,192 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 23:44:14,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033605167] [2023-02-16 23:44:14,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033605167] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 23:44:14,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 23:44:14,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 23:44:14,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680107941] [2023-02-16 23:44:14,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 23:44:14,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 23:44:14,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:44:14,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 23:44:14,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-16 23:44:14,194 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:14,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:44:14,236 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2023-02-16 23:44:14,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 23:44:14,236 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-16 23:44:14,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:44:14,237 INFO L225 Difference]: With dead ends: 47 [2023-02-16 23:44:14,237 INFO L226 Difference]: Without dead ends: 34 [2023-02-16 23:44:14,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-16 23:44:14,238 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 23:44:14,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 31 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 23:44:14,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-16 23:44:14,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 23. [2023-02-16 23:44:14,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:14,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2023-02-16 23:44:14,242 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 15 [2023-02-16 23:44:14,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:44:14,243 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2023-02-16 23:44:14,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:14,243 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2023-02-16 23:44:14,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-16 23:44:14,244 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:44:14,244 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:44:14,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-16 23:44:14,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:44:14,448 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:44:14,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:44:14,449 INFO L85 PathProgramCache]: Analyzing trace with hash -169454663, now seen corresponding path program 1 times [2023-02-16 23:44:14,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:44:14,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774742670] [2023-02-16 23:44:14,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:44:14,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:44:14,463 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 23:44:14,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [785042075] [2023-02-16 23:44:14,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:44:14,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:44:14,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:44:14,487 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:44:14,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 23:44:14,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:44:14,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-16 23:44:14,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:44:14,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 23:44:14,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 23:44:14,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:44:14,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774742670] [2023-02-16 23:44:14,533 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 23:44:14,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785042075] [2023-02-16 23:44:14,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785042075] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 23:44:14,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 23:44:14,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 23:44:14,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990157214] [2023-02-16 23:44:14,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 23:44:14,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 23:44:14,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:44:14,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 23:44:14,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 23:44:14,535 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:14,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:44:14,566 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2023-02-16 23:44:14,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 23:44:14,566 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-16 23:44:14,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:44:14,567 INFO L225 Difference]: With dead ends: 46 [2023-02-16 23:44:14,567 INFO L226 Difference]: Without dead ends: 28 [2023-02-16 23:44:14,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-16 23:44:14,568 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 29 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 23:44:14,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 17 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 23:44:14,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-16 23:44:14,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2023-02-16 23:44:14,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:14,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2023-02-16 23:44:14,572 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 18 [2023-02-16 23:44:14,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:44:14,572 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2023-02-16 23:44:14,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:14,572 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2023-02-16 23:44:14,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-16 23:44:14,573 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:44:14,573 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:44:14,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-16 23:44:14,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:44:14,777 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:44:14,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:44:14,778 INFO L85 PathProgramCache]: Analyzing trace with hash -308201553, now seen corresponding path program 1 times [2023-02-16 23:44:14,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:44:14,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329010226] [2023-02-16 23:44:14,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:44:14,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:44:14,793 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 23:44:14,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1096386837] [2023-02-16 23:44:14,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:44:14,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:44:14,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:44:14,817 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:44:14,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 23:44:14,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:44:14,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-16 23:44:14,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:44:14,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 23:44:14,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 23:44:14,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:44:14,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329010226] [2023-02-16 23:44:14,939 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 23:44:14,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096386837] [2023-02-16 23:44:14,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096386837] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 23:44:14,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 23:44:14,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 23:44:14,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736784282] [2023-02-16 23:44:14,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 23:44:14,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 23:44:14,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:44:14,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 23:44:14,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 23:44:14,941 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:14,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:44:14,982 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2023-02-16 23:44:14,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 23:44:14,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-16 23:44:14,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:44:14,984 INFO L225 Difference]: With dead ends: 57 [2023-02-16 23:44:14,984 INFO L226 Difference]: Without dead ends: 37 [2023-02-16 23:44:14,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 23:44:14,986 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 23:44:14,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 26 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 23:44:14,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-16 23:44:14,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2023-02-16 23:44:14,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:14,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2023-02-16 23:44:14,992 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 21 [2023-02-16 23:44:14,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:44:14,992 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2023-02-16 23:44:14,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:14,992 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2023-02-16 23:44:14,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-16 23:44:14,993 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:44:14,993 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:44:14,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-16 23:44:15,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:44:15,198 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:44:15,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:44:15,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1924412114, now seen corresponding path program 1 times [2023-02-16 23:44:15,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:44:15,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232100143] [2023-02-16 23:44:15,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:44:15,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:44:15,206 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 23:44:15,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732542018] [2023-02-16 23:44:15,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:44:15,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:44:15,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:44:15,208 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:44:15,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 23:44:15,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:44:15,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-16 23:44:15,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:44:15,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2023-02-16 23:44:15,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 9 [2023-02-16 23:44:15,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 23:44:15,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:44:15,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2023-02-16 23:44:15,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 60 [2023-02-16 23:44:15,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 23:44:15,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:44:15,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232100143] [2023-02-16 23:44:15,414 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 23:44:15,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732542018] [2023-02-16 23:44:15,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732542018] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:44:15,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 23:44:15,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2023-02-16 23:44:15,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311378843] [2023-02-16 23:44:15,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 23:44:15,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-16 23:44:15,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:44:15,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-16 23:44:15,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-02-16 23:44:15,416 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:15,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:44:15,723 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2023-02-16 23:44:15,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-16 23:44:15,723 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-16 23:44:15,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:44:15,724 INFO L225 Difference]: With dead ends: 58 [2023-02-16 23:44:15,724 INFO L226 Difference]: Without dead ends: 54 [2023-02-16 23:44:15,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=237, Invalid=693, Unknown=0, NotChecked=0, Total=930 [2023-02-16 23:44:15,725 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 129 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 23:44:15,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 37 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 23:44:15,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-02-16 23:44:15,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2023-02-16 23:44:15,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.326086956521739) internal successors, (61), 46 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:15,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2023-02-16 23:44:15,730 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 22 [2023-02-16 23:44:15,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:44:15,731 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2023-02-16 23:44:15,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:15,731 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2023-02-16 23:44:15,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-16 23:44:15,731 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:44:15,731 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:44:15,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-16 23:44:15,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:44:15,936 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:44:15,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:44:15,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1610605580, now seen corresponding path program 2 times [2023-02-16 23:44:15,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:44:15,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689827200] [2023-02-16 23:44:15,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:44:15,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:44:15,944 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 23:44:15,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930672207] [2023-02-16 23:44:15,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 23:44:15,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:44:15,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:44:15,946 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:44:15,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 23:44:15,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 23:44:15,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 23:44:15,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-16 23:44:15,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:44:15,995 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 23:44:15,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:44:16,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 23:44:16,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:44:16,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689827200] [2023-02-16 23:44:16,026 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 23:44:16,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930672207] [2023-02-16 23:44:16,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930672207] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:44:16,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 23:44:16,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-16 23:44:16,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318458817] [2023-02-16 23:44:16,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 23:44:16,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-16 23:44:16,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:44:16,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-16 23:44:16,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-16 23:44:16,028 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:16,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:44:16,104 INFO L93 Difference]: Finished difference Result 145 states and 190 transitions. [2023-02-16 23:44:16,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 23:44:16,104 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-16 23:44:16,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:44:16,105 INFO L225 Difference]: With dead ends: 145 [2023-02-16 23:44:16,105 INFO L226 Difference]: Without dead ends: 110 [2023-02-16 23:44:16,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-02-16 23:44:16,106 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 79 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 23:44:16,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 52 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 23:44:16,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-02-16 23:44:16,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 81. [2023-02-16 23:44:16,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.3) internal successors, (104), 80 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:16,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2023-02-16 23:44:16,116 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 24 [2023-02-16 23:44:16,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:44:16,116 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2023-02-16 23:44:16,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:16,116 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2023-02-16 23:44:16,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-16 23:44:16,117 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:44:16,117 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:44:16,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-16 23:44:16,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:44:16,322 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:44:16,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:44:16,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1861003047, now seen corresponding path program 3 times [2023-02-16 23:44:16,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:44:16,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520624227] [2023-02-16 23:44:16,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:44:16,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:44:16,342 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 23:44:16,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [195919991] [2023-02-16 23:44:16,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 23:44:16,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:44:16,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:44:16,344 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:44:16,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-16 23:44:16,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-16 23:44:16,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 23:44:16,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-16 23:44:16,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:44:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 23:44:16,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:44:16,451 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 23:44:16,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:44:16,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520624227] [2023-02-16 23:44:16,451 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 23:44:16,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195919991] [2023-02-16 23:44:16,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195919991] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:44:16,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 23:44:16,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-16 23:44:16,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809638096] [2023-02-16 23:44:16,452 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 23:44:16,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-16 23:44:16,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:44:16,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-16 23:44:16,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-16 23:44:16,453 INFO L87 Difference]: Start difference. First operand 81 states and 104 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:16,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:44:16,516 INFO L93 Difference]: Finished difference Result 174 states and 219 transitions. [2023-02-16 23:44:16,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 23:44:16,516 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-16 23:44:16,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:44:16,517 INFO L225 Difference]: With dead ends: 174 [2023-02-16 23:44:16,517 INFO L226 Difference]: Without dead ends: 151 [2023-02-16 23:44:16,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-02-16 23:44:16,518 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 45 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 23:44:16,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 56 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 23:44:16,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-02-16 23:44:16,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 94. [2023-02-16 23:44:16,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.2795698924731183) internal successors, (119), 93 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:16,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2023-02-16 23:44:16,529 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 27 [2023-02-16 23:44:16,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:44:16,529 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2023-02-16 23:44:16,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:16,530 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2023-02-16 23:44:16,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-16 23:44:16,530 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:44:16,530 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:44:16,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-16 23:44:16,744 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,SelfDestructingSolverStorable7 [2023-02-16 23:44:16,745 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:44:16,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:44:16,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1161564239, now seen corresponding path program 1 times [2023-02-16 23:44:16,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:44:16,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524485534] [2023-02-16 23:44:16,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:44:16,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:44:16,752 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 23:44:16,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1741909225] [2023-02-16 23:44:16,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:44:16,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:44:16,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:44:16,769 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:44:16,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-16 23:44:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:44:16,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-16 23:44:16,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:44:16,852 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 23:44:16,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:44:16,873 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 23:44:16,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:44:16,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524485534] [2023-02-16 23:44:16,873 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 23:44:16,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741909225] [2023-02-16 23:44:16,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741909225] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:44:16,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 23:44:16,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-02-16 23:44:16,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088936043] [2023-02-16 23:44:16,875 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 23:44:16,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-16 23:44:16,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:44:16,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-16 23:44:16,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-02-16 23:44:16,877 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:16,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:44:16,996 INFO L93 Difference]: Finished difference Result 185 states and 239 transitions. [2023-02-16 23:44:16,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-16 23:44:16,996 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-16 23:44:16,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:44:16,997 INFO L225 Difference]: With dead ends: 185 [2023-02-16 23:44:16,997 INFO L226 Difference]: Without dead ends: 107 [2023-02-16 23:44:16,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2023-02-16 23:44:16,999 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 66 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 23:44:16,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 35 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 23:44:17,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-02-16 23:44:17,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2023-02-16 23:44:17,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.240506329113924) internal successors, (98), 79 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:17,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 98 transitions. [2023-02-16 23:44:17,012 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 98 transitions. Word has length 28 [2023-02-16 23:44:17,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:44:17,013 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 98 transitions. [2023-02-16 23:44:17,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:17,013 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 98 transitions. [2023-02-16 23:44:17,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-16 23:44:17,017 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:44:17,018 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:44:17,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-16 23:44:17,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:44:17,222 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:44:17,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:44:17,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1512912821, now seen corresponding path program 1 times [2023-02-16 23:44:17,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:44:17,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888178219] [2023-02-16 23:44:17,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:44:17,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:44:17,240 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 23:44:17,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150122600] [2023-02-16 23:44:17,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:44:17,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:44:17,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:44:17,251 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:44:17,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-16 23:44:17,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:44:17,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-16 23:44:17,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:44:17,309 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-16 23:44:17,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:44:17,326 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-16 23:44:17,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:44:17,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888178219] [2023-02-16 23:44:17,327 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 23:44:17,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150122600] [2023-02-16 23:44:17,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150122600] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:44:17,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 23:44:17,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-02-16 23:44:17,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379618882] [2023-02-16 23:44:17,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 23:44:17,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-16 23:44:17,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:44:17,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-16 23:44:17,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-02-16 23:44:17,329 INFO L87 Difference]: Start difference. First operand 80 states and 98 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:17,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:44:17,529 INFO L93 Difference]: Finished difference Result 173 states and 226 transitions. [2023-02-16 23:44:17,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-16 23:44:17,529 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-16 23:44:17,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:44:17,530 INFO L225 Difference]: With dead ends: 173 [2023-02-16 23:44:17,530 INFO L226 Difference]: Without dead ends: 103 [2023-02-16 23:44:17,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2023-02-16 23:44:17,533 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 56 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 23:44:17,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 39 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 23:44:17,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-02-16 23:44:17,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 75. [2023-02-16 23:44:17,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 74 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:17,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2023-02-16 23:44:17,544 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 28 [2023-02-16 23:44:17,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:44:17,545 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2023-02-16 23:44:17,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:17,545 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2023-02-16 23:44:17,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-16 23:44:17,545 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:44:17,545 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:44:17,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-16 23:44:17,750 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,SelfDestructingSolverStorable9 [2023-02-16 23:44:17,751 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:44:17,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:44:17,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1901938394, now seen corresponding path program 1 times [2023-02-16 23:44:17,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:44:17,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133621533] [2023-02-16 23:44:17,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:44:17,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:44:17,773 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 23:44:17,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2016028358] [2023-02-16 23:44:17,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:44:17,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:44:17,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:44:17,791 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:44:17,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-16 23:44:17,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:44:17,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-16 23:44:17,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:44:17,845 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 23:44:17,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:44:17,862 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 23:44:17,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:44:17,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133621533] [2023-02-16 23:44:17,863 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 23:44:17,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016028358] [2023-02-16 23:44:17,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016028358] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:44:17,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 23:44:17,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-16 23:44:17,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176964047] [2023-02-16 23:44:17,864 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 23:44:17,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-16 23:44:17,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:44:17,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-16 23:44:17,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-16 23:44:17,865 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:17,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:44:17,936 INFO L93 Difference]: Finished difference Result 89 states and 106 transitions. [2023-02-16 23:44:17,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 23:44:17,936 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-02-16 23:44:17,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:44:17,937 INFO L225 Difference]: With dead ends: 89 [2023-02-16 23:44:17,937 INFO L226 Difference]: Without dead ends: 76 [2023-02-16 23:44:17,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-02-16 23:44:17,938 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 62 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 23:44:17,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 35 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 23:44:17,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-02-16 23:44:17,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2023-02-16 23:44:17,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:17,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2023-02-16 23:44:17,945 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 32 [2023-02-16 23:44:17,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:44:17,945 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2023-02-16 23:44:17,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:17,946 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2023-02-16 23:44:17,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-16 23:44:17,947 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:44:17,947 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:44:17,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-16 23:44:18,151 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,SelfDestructingSolverStorable10 [2023-02-16 23:44:18,152 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:44:18,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:44:18,152 INFO L85 PathProgramCache]: Analyzing trace with hash -533293431, now seen corresponding path program 2 times [2023-02-16 23:44:18,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:44:18,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878168449] [2023-02-16 23:44:18,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:44:18,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:44:18,169 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 23:44:18,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939307671] [2023-02-16 23:44:18,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 23:44:18,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:44:18,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:44:18,176 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:44:18,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-16 23:44:18,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 23:44:18,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 23:44:18,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-16 23:44:18,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:44:18,234 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-16 23:44:18,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:44:18,244 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-16 23:44:18,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:44:18,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878168449] [2023-02-16 23:44:18,245 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 23:44:18,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939307671] [2023-02-16 23:44:18,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939307671] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:44:18,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 23:44:18,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-02-16 23:44:18,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501907241] [2023-02-16 23:44:18,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 23:44:18,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-16 23:44:18,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:44:18,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-16 23:44:18,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-02-16 23:44:18,247 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:18,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:44:18,320 INFO L93 Difference]: Finished difference Result 140 states and 168 transitions. [2023-02-16 23:44:18,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-16 23:44:18,320 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-02-16 23:44:18,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:44:18,321 INFO L225 Difference]: With dead ends: 140 [2023-02-16 23:44:18,321 INFO L226 Difference]: Without dead ends: 95 [2023-02-16 23:44:18,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2023-02-16 23:44:18,322 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 48 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 23:44:18,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 31 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 23:44:18,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-16 23:44:18,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 66. [2023-02-16 23:44:18,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2) internal successors, (78), 65 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:18,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2023-02-16 23:44:18,327 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 44 [2023-02-16 23:44:18,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:44:18,327 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2023-02-16 23:44:18,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:18,327 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2023-02-16 23:44:18,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-16 23:44:18,328 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:44:18,328 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:44:18,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-16 23:44:18,532 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,SelfDestructingSolverStorable11 [2023-02-16 23:44:18,532 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:44:18,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:44:18,532 INFO L85 PathProgramCache]: Analyzing trace with hash -436388146, now seen corresponding path program 3 times [2023-02-16 23:44:18,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:44:18,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441673682] [2023-02-16 23:44:18,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:44:18,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:44:18,539 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 23:44:18,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126574122] [2023-02-16 23:44:18,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 23:44:18,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:44:18,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:44:18,561 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:44:18,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-16 23:44:18,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-16 23:44:18,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 23:44:18,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-16 23:44:18,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:44:18,613 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-02-16 23:44:18,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 23:44:18,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:44:18,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441673682] [2023-02-16 23:44:18,614 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 23:44:18,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126574122] [2023-02-16 23:44:18,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126574122] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 23:44:18,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 23:44:18,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 23:44:18,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486210541] [2023-02-16 23:44:18,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 23:44:18,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 23:44:18,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:44:18,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 23:44:18,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-16 23:44:18,616 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:18,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:44:18,650 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2023-02-16 23:44:18,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 23:44:18,651 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-02-16 23:44:18,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:44:18,652 INFO L225 Difference]: With dead ends: 90 [2023-02-16 23:44:18,652 INFO L226 Difference]: Without dead ends: 70 [2023-02-16 23:44:18,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-16 23:44:18,653 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 23:44:18,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 25 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 23:44:18,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-02-16 23:44:18,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2023-02-16 23:44:18,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:18,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2023-02-16 23:44:18,658 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 45 [2023-02-16 23:44:18,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:44:18,658 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2023-02-16 23:44:18,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 23:44:18,658 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2023-02-16 23:44:18,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-16 23:44:18,659 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:44:18,659 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:44:18,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-16 23:44:18,867 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,SelfDestructingSolverStorable12 [2023-02-16 23:44:18,867 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:44:18,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:44:18,868 INFO L85 PathProgramCache]: Analyzing trace with hash -570401652, now seen corresponding path program 4 times [2023-02-16 23:44:18,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:44:18,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741731283] [2023-02-16 23:44:18,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:44:18,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:44:18,880 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 23:44:18,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1442011651] [2023-02-16 23:44:18,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 23:44:18,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:44:18,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:44:18,881 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) [2023-02-16 23:44:18,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-16 23:44:18,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 23:44:18,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 23:44:18,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 69 conjunts are in the unsatisfiable core [2023-02-16 23:44:18,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:44:18,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2023-02-16 23:44:19,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 44 [2023-02-16 23:44:19,051 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 23:44:19,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 226 [2023-02-16 23:44:19,119 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 23:44:19,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 257 treesize of output 444 [2023-02-16 23:44:19,625 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 23:44:19,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 914 treesize of output 1103