./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array30_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-patterns/array30_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 bf9fb5599b361d63a40d668c035ff2f49b2f61ec342dc99fdd2f9d975d29190c --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 18:46:30,673 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 18:46:30,675 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 18:46:30,712 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 18:46:30,712 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 18:46:30,714 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 18:46:30,716 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 18:46:30,718 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 18:46:30,719 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 18:46:30,722 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 18:46:30,723 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 18:46:30,725 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 18:46:30,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 18:46:30,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 18:46:30,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 18:46:30,729 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 18:46:30,730 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 18:46:30,731 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 18:46:30,732 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 18:46:30,736 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 18:46:30,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 18:46:30,737 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 18:46:30,738 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 18:46:30,739 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 18:46:30,745 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 18:46:30,745 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 18:46:30,745 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 18:46:30,746 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 18:46:30,747 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 18:46:30,747 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 18:46:30,747 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 18:46:30,748 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 18:46:30,749 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 18:46:30,749 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 18:46:30,751 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 18:46:30,751 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 18:46:30,751 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 18:46:30,751 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 18:46:30,752 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 18:46:30,752 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 18:46:30,753 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 18:46:30,754 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 18:46:30,786 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 18:46:30,786 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 18:46:30,787 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 18:46:30,787 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 18:46:30,787 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 18:46:30,788 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 18:46:30,788 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 18:46:30,788 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 18:46:30,788 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 18:46:30,789 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 18:46:30,789 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 18:46:30,789 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 18:46:30,789 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 18:46:30,790 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 18:46:30,790 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 18:46:30,790 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 18:46:30,790 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 18:46:30,790 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 18:46:30,790 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 18:46:30,791 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 18:46:30,791 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 18:46:30,791 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 18:46:30,791 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 18:46:30,791 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 18:46:30,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 18:46:30,791 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 18:46:30,792 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 18:46:30,792 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 18:46:30,792 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 18:46:30,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 18:46:30,793 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 18:46:30,793 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 18:46:30,793 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 18:46:30,793 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 18:46:30,793 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 18:46:30,793 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf9fb5599b361d63a40d668c035ff2f49b2f61ec342dc99fdd2f9d975d29190c [2023-02-15 18:46:30,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 18:46:31,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 18:46:31,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 18:46:31,021 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 18:46:31,021 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 18:46:31,028 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array30_pattern.c [2023-02-15 18:46:32,019 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 18:46:32,158 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 18:46:32,158 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array30_pattern.c [2023-02-15 18:46:32,162 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c01fdcb8/99642c80069d49fa8f217544b8f78747/FLAGf3c87e8ab [2023-02-15 18:46:32,171 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c01fdcb8/99642c80069d49fa8f217544b8f78747 [2023-02-15 18:46:32,173 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 18:46:32,174 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 18:46:32,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 18:46:32,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 18:46:32,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 18:46:32,178 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 06:46:32" (1/1) ... [2023-02-15 18:46:32,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15ce468e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:46:32, skipping insertion in model container [2023-02-15 18:46:32,178 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 06:46:32" (1/1) ... [2023-02-15 18:46:32,183 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 18:46:32,198 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 18:46:32,308 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/array30_pattern.c[1189,1202] [2023-02-15 18:46:32,324 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 18:46:32,332 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 18:46:32,341 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/array30_pattern.c[1189,1202] [2023-02-15 18:46:32,356 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 18:46:32,366 INFO L208 MainTranslator]: Completed translation [2023-02-15 18:46:32,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:46:32 WrapperNode [2023-02-15 18:46:32,367 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 18:46:32,367 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 18:46:32,368 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 18:46:32,368 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 18:46:32,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:46:32" (1/1) ... [2023-02-15 18:46:32,382 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:46:32" (1/1) ... [2023-02-15 18:46:32,399 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 80 [2023-02-15 18:46:32,400 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 18:46:32,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 18:46:32,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 18:46:32,401 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 18:46:32,406 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:46:32" (1/1) ... [2023-02-15 18:46:32,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:46:32" (1/1) ... [2023-02-15 18:46:32,409 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:46:32" (1/1) ... [2023-02-15 18:46:32,410 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:46:32" (1/1) ... [2023-02-15 18:46:32,420 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:46:32" (1/1) ... [2023-02-15 18:46:32,422 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:46:32" (1/1) ... [2023-02-15 18:46:32,425 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:46:32" (1/1) ... [2023-02-15 18:46:32,426 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:46:32" (1/1) ... [2023-02-15 18:46:32,428 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 18:46:32,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 18:46:32,431 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 18:46:32,431 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 18:46:32,432 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:46:32" (1/1) ... [2023-02-15 18:46:32,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 18:46:32,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:46:32,452 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 18:46:32,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 18:46:32,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 18:46:32,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 18:46:32,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 18:46:32,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 18:46:32,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 18:46:32,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 18:46:32,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 18:46:32,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 18:46:32,518 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 18:46:32,519 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 18:46:32,635 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 18:46:32,644 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 18:46:32,645 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-15 18:46:32,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 06:46:32 BoogieIcfgContainer [2023-02-15 18:46:32,646 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 18:46:32,647 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 18:46:32,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 18:46:32,649 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 18:46:32,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 06:46:32" (1/3) ... [2023-02-15 18:46:32,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c385715 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 06:46:32, skipping insertion in model container [2023-02-15 18:46:32,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:46:32" (2/3) ... [2023-02-15 18:46:32,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c385715 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 06:46:32, skipping insertion in model container [2023-02-15 18:46:32,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 06:46:32" (3/3) ... [2023-02-15 18:46:32,651 INFO L112 eAbstractionObserver]: Analyzing ICFG array30_pattern.c [2023-02-15 18:46:32,662 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 18:46:32,663 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 18:46:32,706 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 18:46:32,734 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;@2c5bc70b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 18:46:32,735 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 18:46:32,737 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:46:32,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 18:46:32,741 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:46:32,741 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:46:32,742 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:46:32,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:46:32,749 INFO L85 PathProgramCache]: Analyzing trace with hash -409725857, now seen corresponding path program 1 times [2023-02-15 18:46:32,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:46:32,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371271457] [2023-02-15 18:46:32,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:46:32,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:46:32,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:46:32,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:46:32,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371271457] [2023-02-15 18:46:32,847 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 18:46:32,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261475100] [2023-02-15 18:46:32,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:46:32,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:46:32,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:46:32,850 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:46:32,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 18:46:32,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:46:32,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 18:46:32,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:46:32,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:46:32,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 18:46:32,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261475100] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:46:32,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:46:32,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 18:46:32,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196155147] [2023-02-15 18:46:32,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:46:32,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 18:46:32,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:46:32,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 18:46:32,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 18:46:32,956 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 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) [2023-02-15 18:46:32,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:46:32,971 INFO L93 Difference]: Finished difference Result 43 states and 62 transitions. [2023-02-15 18:46:32,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 18:46:32,972 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 [2023-02-15 18:46:32,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:46:32,979 INFO L225 Difference]: With dead ends: 43 [2023-02-15 18:46:32,979 INFO L226 Difference]: Without dead ends: 19 [2023-02-15 18:46:32,981 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 [2023-02-15 18:46:32,983 INFO L413 NwaCegarLoop]: 27 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, 27 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 [2023-02-15 18:46:32,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:46:32,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-15 18:46:33,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-02-15 18:46:33,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:46:33,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-02-15 18:46:33,003 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 10 [2023-02-15 18:46:33,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:46:33,003 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-02-15 18:46:33,004 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) [2023-02-15 18:46:33,004 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-02-15 18:46:33,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 18:46:33,004 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:46:33,004 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:46:33,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 18:46:33,205 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 [2023-02-15 18:46:33,205 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:46:33,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:46:33,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1934801258, now seen corresponding path program 1 times [2023-02-15 18:46:33,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:46:33,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685400359] [2023-02-15 18:46:33,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:46:33,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:46:33,228 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:46:33,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [895722934] [2023-02-15 18:46:33,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:46:33,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:46:33,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:46:33,234 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:46:33,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 18:46:33,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:46:33,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 18:46:33,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:46:33,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:46:33,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 18:46:33,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:46:33,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685400359] [2023-02-15 18:46:33,347 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:46:33,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895722934] [2023-02-15 18:46:33,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895722934] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:46:33,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:46:33,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 18:46:33,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869308869] [2023-02-15 18:46:33,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:46:33,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 18:46:33,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:46:33,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 18:46:33,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 18:46:33,350 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2023-02-15 18:46:33,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:46:33,407 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2023-02-15 18:46:33,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 18:46:33,407 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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 [2023-02-15 18:46:33,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:46:33,408 INFO L225 Difference]: With dead ends: 38 [2023-02-15 18:46:33,408 INFO L226 Difference]: Without dead ends: 29 [2023-02-15 18:46:33,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-15 18:46:33,409 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 77 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:46:33,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 15 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:46:33,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-15 18:46:33,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2023-02-15 18:46:33,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:46:33,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-02-15 18:46:33,414 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 10 [2023-02-15 18:46:33,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:46:33,414 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-02-15 18:46:33,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2023-02-15 18:46:33,414 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-02-15 18:46:33,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 18:46:33,415 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:46:33,415 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:46:33,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 18:46:33,620 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 [2023-02-15 18:46:33,620 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:46:33,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:46:33,621 INFO L85 PathProgramCache]: Analyzing trace with hash 761451258, now seen corresponding path program 1 times [2023-02-15 18:46:33,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:46:33,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723367163] [2023-02-15 18:46:33,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:46:33,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:46:33,630 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:46:33,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1388258789] [2023-02-15 18:46:33,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:46:33,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:46:33,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:46:33,633 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:46:33,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 18:46:33,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:46:33,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 18:46:33,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:46:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 18:46:33,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 18:46:33,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:46:33,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723367163] [2023-02-15 18:46:33,685 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:46:33,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388258789] [2023-02-15 18:46:33,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388258789] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:46:33,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:46:33,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 18:46:33,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111807835] [2023-02-15 18:46:33,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:46:33,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 18:46:33,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:46:33,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 18:46:33,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 18:46:33,687 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:46:33,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:46:33,719 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2023-02-15 18:46:33,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 18:46:33,720 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-15 18:46:33,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:46:33,720 INFO L225 Difference]: With dead ends: 43 [2023-02-15 18:46:33,720 INFO L226 Difference]: Without dead ends: 27 [2023-02-15 18:46:33,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 18:46:33,722 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:46:33,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 20 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:46:33,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-15 18:46:33,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2023-02-15 18:46:33,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:46:33,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-02-15 18:46:33,726 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2023-02-15 18:46:33,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:46:33,726 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-02-15 18:46:33,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:46:33,727 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-02-15 18:46:33,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-15 18:46:33,727 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:46:33,727 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] [2023-02-15 18:46:33,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 18:46:33,932 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 [2023-02-15 18:46:33,932 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:46:33,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:46:33,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1879431543, now seen corresponding path program 1 times [2023-02-15 18:46:33,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:46:33,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823063667] [2023-02-15 18:46:33,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:46:33,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:46:33,951 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:46:33,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [172867785] [2023-02-15 18:46:33,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:46:33,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:46:33,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:46:33,954 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:46:33,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 18:46:33,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:46:33,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 18:46:33,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:46:34,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 18:46:34,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 18:46:34,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:46:34,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823063667] [2023-02-15 18:46:34,054 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:46:34,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172867785] [2023-02-15 18:46:34,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172867785] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:46:34,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:46:34,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 18:46:34,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097365813] [2023-02-15 18:46:34,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:46:34,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 18:46:34,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:46:34,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 18:46:34,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 18:46:34,057 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:46:34,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:46:34,131 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2023-02-15 18:46:34,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 18:46:34,132 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-15 18:46:34,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:46:34,135 INFO L225 Difference]: With dead ends: 75 [2023-02-15 18:46:34,136 INFO L226 Difference]: Without dead ends: 57 [2023-02-15 18:46:34,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-15 18:46:34,140 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 46 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:46:34,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 45 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:46:34,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-02-15 18:46:34,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 25. [2023-02-15 18:46:34,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:46:34,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-02-15 18:46:34,149 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2023-02-15 18:46:34,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:46:34,153 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-02-15 18:46:34,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:46:34,153 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-02-15 18:46:34,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-15 18:46:34,153 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:46:34,153 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] [2023-02-15 18:46:34,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-15 18:46:34,358 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 [2023-02-15 18:46:34,358 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:46:34,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:46:34,359 INFO L85 PathProgramCache]: Analyzing trace with hash 858363189, now seen corresponding path program 1 times [2023-02-15 18:46:34,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:46:34,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303874391] [2023-02-15 18:46:34,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:46:34,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:46:34,370 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:46:34,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1132841075] [2023-02-15 18:46:34,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:46:34,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:46:34,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:46:34,375 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:46:34,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 18:46:34,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:46:34,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-15 18:46:34,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:46:34,616 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 15 treesize of output 11 [2023-02-15 18:46:34,753 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 22 treesize of output 10 [2023-02-15 18:46:34,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:46:34,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:46:34,975 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 29 treesize of output 27 [2023-02-15 18:46:34,978 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 54 treesize of output 52 [2023-02-15 18:46:36,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:46:36,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:46:36,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303874391] [2023-02-15 18:46:36,781 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:46:36,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132841075] [2023-02-15 18:46:36,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132841075] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:46:36,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:46:36,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2023-02-15 18:46:36,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371619650] [2023-02-15 18:46:36,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:46:36,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-15 18:46:36,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:46:36,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-15 18:46:36,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2023-02-15 18:46:36,785 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:46:38,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 18:46:57,566 WARN L233 SmtUtils]: Spent 5.72s on a formula simplification. DAG size of input: 87 DAG size of output: 82 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 18:47:03,927 WARN L233 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 93 DAG size of output: 83 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 18:47:19,077 WARN L233 SmtUtils]: Spent 7.83s on a formula simplification. DAG size of input: 92 DAG size of output: 82 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 18:47:24,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-02-15 18:47:26,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-02-15 18:47:41,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:47:41,598 INFO L93 Difference]: Finished difference Result 155 states and 193 transitions. [2023-02-15 18:47:41,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-02-15 18:47:41,598 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 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 [2023-02-15 18:47:41,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:47:41,600 INFO L225 Difference]: With dead ends: 155 [2023-02-15 18:47:41,600 INFO L226 Difference]: Without dead ends: 149 [2023-02-15 18:47:41,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2668 ImplicationChecksByTransitivity, 58.4s TimeCoverageRelationStatistics Valid=1590, Invalid=6595, Unknown=5, NotChecked=0, Total=8190 [2023-02-15 18:47:41,603 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 366 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 77 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2023-02-15 18:47:41,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 102 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 644 Invalid, 3 Unknown, 0 Unchecked, 7.6s Time] [2023-02-15 18:47:41,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-02-15 18:47:41,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 58. [2023-02-15 18:47:41,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 57 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:47:41,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 75 transitions. [2023-02-15 18:47:41,634 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 75 transitions. Word has length 22 [2023-02-15 18:47:41,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:47:41,634 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 75 transitions. [2023-02-15 18:47:41,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:47:41,635 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 75 transitions. [2023-02-15 18:47:41,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-15 18:47:41,635 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:47:41,635 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] [2023-02-15 18:47:41,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 18:47:41,839 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 [2023-02-15 18:47:41,841 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:47:41,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:47:41,841 INFO L85 PathProgramCache]: Analyzing trace with hash 413561143, now seen corresponding path program 2 times [2023-02-15 18:47:41,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:47:41,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887682521] [2023-02-15 18:47:41,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:47:41,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:47:41,852 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:47:41,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1189896056] [2023-02-15 18:47:41,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 18:47:41,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:47:41,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:47:41,862 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:47:41,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 18:47:41,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 18:47:41,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:47:41,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 18:47:41,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:47:41,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:47:41,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:47:41,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:47:41,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:47:41,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887682521] [2023-02-15 18:47:41,970 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:47:41,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189896056] [2023-02-15 18:47:41,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189896056] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:47:41,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:47:41,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-15 18:47:41,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451498380] [2023-02-15 18:47:41,971 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:47:41,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 18:47:41,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:47:41,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 18:47:41,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-15 18:47:41,977 INFO L87 Difference]: Start difference. First operand 58 states and 75 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) [2023-02-15 18:47:42,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:47:42,072 INFO L93 Difference]: Finished difference Result 143 states and 183 transitions. [2023-02-15 18:47:42,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 18:47:42,073 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 [2023-02-15 18:47:42,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:47:42,074 INFO L225 Difference]: With dead ends: 143 [2023-02-15 18:47:42,074 INFO L226 Difference]: Without dead ends: 99 [2023-02-15 18:47:42,074 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 [2023-02-15 18:47:42,075 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 88 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:47:42,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 65 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:47:42,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-02-15 18:47:42,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 74. [2023-02-15 18:47:42,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.273972602739726) internal successors, (93), 73 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:47:42,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2023-02-15 18:47:42,093 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 24 [2023-02-15 18:47:42,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:47:42,093 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2023-02-15 18:47:42,093 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) [2023-02-15 18:47:42,093 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2023-02-15 18:47:42,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 18:47:42,094 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:47:42,094 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:47:42,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 18:47:42,298 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 [2023-02-15 18:47:42,299 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:47:42,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:47:42,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1333246064, now seen corresponding path program 1 times [2023-02-15 18:47:42,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:47:42,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859433765] [2023-02-15 18:47:42,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:47:42,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:47:42,307 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:47:42,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1569662286] [2023-02-15 18:47:42,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:47:42,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:47:42,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:47:42,311 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:47:42,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 18:47:42,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:47:42,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 18:47:42,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:47:42,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 18:47:42,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:47:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 18:47:42,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:47:42,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859433765] [2023-02-15 18:47:42,430 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:47:42,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569662286] [2023-02-15 18:47:42,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569662286] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:47:42,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:47:42,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-02-15 18:47:42,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751139559] [2023-02-15 18:47:42,430 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:47:42,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 18:47:42,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:47:42,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 18:47:42,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-02-15 18:47:42,432 INFO L87 Difference]: Start difference. First operand 74 states and 93 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) [2023-02-15 18:47:42,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:47:42,569 INFO L93 Difference]: Finished difference Result 121 states and 151 transitions. [2023-02-15 18:47:42,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 18:47:42,569 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 26 [2023-02-15 18:47:42,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:47:42,570 INFO L225 Difference]: With dead ends: 121 [2023-02-15 18:47:42,570 INFO L226 Difference]: Without dead ends: 103 [2023-02-15 18:47:42,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2023-02-15 18:47:42,571 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 53 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:47:42,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 57 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:47:42,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-02-15 18:47:42,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 81. [2023-02-15 18:47:42,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.2625) internal successors, (101), 80 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:47:42,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 101 transitions. [2023-02-15 18:47:42,589 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 101 transitions. Word has length 26 [2023-02-15 18:47:42,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:47:42,589 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 101 transitions. [2023-02-15 18:47:42,590 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) [2023-02-15 18:47:42,590 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 101 transitions. [2023-02-15 18:47:42,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 18:47:42,590 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:47:42,590 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] [2023-02-15 18:47:42,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 18:47:42,797 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 [2023-02-15 18:47:42,797 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:47:42,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:47:42,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1250996973, now seen corresponding path program 3 times [2023-02-15 18:47:42,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:47:42,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509367616] [2023-02-15 18:47:42,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:47:42,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:47:42,804 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:47:42,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [638559676] [2023-02-15 18:47:42,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 18:47:42,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:47:42,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:47:42,805 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:47:42,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 18:47:42,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-15 18:47:42,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:47:42,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 18:47:42,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:47:42,895 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 18:47:42,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:47:42,921 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 18:47:42,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:47:42,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509367616] [2023-02-15 18:47:42,922 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:47:42,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638559676] [2023-02-15 18:47:42,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638559676] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:47:42,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:47:42,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-15 18:47:42,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926699244] [2023-02-15 18:47:42,922 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:47:42,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 18:47:42,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:47:42,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 18:47:42,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-15 18:47:42,923 INFO L87 Difference]: Start difference. First operand 81 states and 101 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) [2023-02-15 18:47:43,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:47:43,028 INFO L93 Difference]: Finished difference Result 137 states and 164 transitions. [2023-02-15 18:47:43,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 18:47:43,029 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 [2023-02-15 18:47:43,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:47:43,029 INFO L225 Difference]: With dead ends: 137 [2023-02-15 18:47:43,029 INFO L226 Difference]: Without dead ends: 121 [2023-02-15 18:47:43,030 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 [2023-02-15 18:47:43,031 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:47:43,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 52 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:47:43,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-02-15 18:47:43,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 83. [2023-02-15 18:47:43,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.2560975609756098) internal successors, (103), 82 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:47:43,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 103 transitions. [2023-02-15 18:47:43,061 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 103 transitions. Word has length 27 [2023-02-15 18:47:43,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:47:43,061 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 103 transitions. [2023-02-15 18:47:43,061 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) [2023-02-15 18:47:43,061 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 103 transitions. [2023-02-15 18:47:43,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 18:47:43,063 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:47:43,063 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:47:43,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 18:47:43,264 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 [2023-02-15 18:47:43,264 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:47:43,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:47:43,264 INFO L85 PathProgramCache]: Analyzing trace with hash -378872012, now seen corresponding path program 2 times [2023-02-15 18:47:43,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:47:43,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820572746] [2023-02-15 18:47:43,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:47:43,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:47:43,273 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:47:43,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1725054310] [2023-02-15 18:47:43,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 18:47:43,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:47:43,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:47:43,274 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:47:43,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 18:47:43,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 18:47:43,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:47:43,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 18:47:43,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:47:43,353 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 18:47:43,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:47:43,375 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 18:47:43,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:47:43,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820572746] [2023-02-15 18:47:43,375 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:47:43,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725054310] [2023-02-15 18:47:43,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725054310] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:47:43,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:47:43,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-02-15 18:47:43,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492639810] [2023-02-15 18:47:43,376 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:47:43,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 18:47:43,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:47:43,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 18:47:43,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-02-15 18:47:43,377 INFO L87 Difference]: Start difference. First operand 83 states and 103 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2023-02-15 18:47:43,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:47:43,481 INFO L93 Difference]: Finished difference Result 115 states and 137 transitions. [2023-02-15 18:47:43,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 18:47:43,482 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 29 [2023-02-15 18:47:43,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:47:43,482 INFO L225 Difference]: With dead ends: 115 [2023-02-15 18:47:43,482 INFO L226 Difference]: Without dead ends: 73 [2023-02-15 18:47:43,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2023-02-15 18:47:43,483 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 76 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:47:43,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 34 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:47:43,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-02-15 18:47:43,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 61. [2023-02-15 18:47:43,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:47:43,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2023-02-15 18:47:43,495 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 29 [2023-02-15 18:47:43,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:47:43,495 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2023-02-15 18:47:43,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2023-02-15 18:47:43,495 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2023-02-15 18:47:43,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 18:47:43,496 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:47:43,496 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:47:43,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 18:47:43,700 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 [2023-02-15 18:47:43,701 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:47:43,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:47:43,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1285246055, now seen corresponding path program 3 times [2023-02-15 18:47:43,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:47:43,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473094944] [2023-02-15 18:47:43,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:47:43,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:47:43,710 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:47:43,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [896830778] [2023-02-15 18:47:43,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 18:47:43,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:47:43,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:47:43,712 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:47:43,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 18:47:43,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-15 18:47:43,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:47:43,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 18:47:43,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:47:43,850 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 18:47:43,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:47:43,886 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 18:47:43,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:47:43,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473094944] [2023-02-15 18:47:43,887 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:47:43,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896830778] [2023-02-15 18:47:43,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896830778] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:47:43,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:47:43,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-15 18:47:43,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320619033] [2023-02-15 18:47:43,887 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:47:43,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 18:47:43,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:47:43,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 18:47:43,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-15 18:47:43,888 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:47:44,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:47:44,003 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2023-02-15 18:47:44,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 18:47:44,003 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 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 33 [2023-02-15 18:47:44,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:47:44,004 INFO L225 Difference]: With dead ends: 74 [2023-02-15 18:47:44,004 INFO L226 Difference]: Without dead ends: 61 [2023-02-15 18:47:44,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2023-02-15 18:47:44,005 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:47:44,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 35 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:47:44,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-02-15 18:47:44,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2023-02-15 18:47:44,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:47:44,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2023-02-15 18:47:44,014 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 33 [2023-02-15 18:47:44,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:47:44,014 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2023-02-15 18:47:44,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:47:44,014 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2023-02-15 18:47:44,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 18:47:44,015 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:47:44,015 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:47:44,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 18:47:44,222 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 [2023-02-15 18:47:44,222 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:47:44,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:47:44,222 INFO L85 PathProgramCache]: Analyzing trace with hash -2069220910, now seen corresponding path program 4 times [2023-02-15 18:47:44,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:47:44,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645203981] [2023-02-15 18:47:44,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:47:44,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:47:44,231 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:47:44,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1455408614] [2023-02-15 18:47:44,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 18:47:44,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:47:44,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:47:44,233 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:47:44,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 18:47:44,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 18:47:44,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:47:44,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 18:47:44,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:47:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-15 18:47:44,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:47:44,331 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-15 18:47:44,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:47:44,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645203981] [2023-02-15 18:47:44,332 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:47:44,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455408614] [2023-02-15 18:47:44,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455408614] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:47:44,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:47:44,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-15 18:47:44,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970613285] [2023-02-15 18:47:44,332 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:47:44,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 18:47:44,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:47:44,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 18:47:44,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-15 18:47:44,333 INFO L87 Difference]: Start difference. First operand 49 states and 58 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) [2023-02-15 18:47:44,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:47:44,421 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2023-02-15 18:47:44,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 18:47:44,421 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 44 [2023-02-15 18:47:44,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:47:44,422 INFO L225 Difference]: With dead ends: 58 [2023-02-15 18:47:44,422 INFO L226 Difference]: Without dead ends: 52 [2023-02-15 18:47:44,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-02-15 18:47:44,423 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 55 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:47:44,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 61 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:47:44,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-15 18:47:44,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2023-02-15 18:47:44,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:47:44,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2023-02-15 18:47:44,437 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 44 [2023-02-15 18:47:44,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:47:44,437 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2023-02-15 18:47:44,437 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) [2023-02-15 18:47:44,438 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2023-02-15 18:47:44,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 18:47:44,438 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:47:44,438 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:47:44,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 18:47:44,644 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 [2023-02-15 18:47:44,644 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:47:44,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:47:44,644 INFO L85 PathProgramCache]: Analyzing trace with hash 208820884, now seen corresponding path program 5 times [2023-02-15 18:47:44,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:47:44,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501403619] [2023-02-15 18:47:44,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:47:44,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:47:44,651 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:47:44,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [53117411] [2023-02-15 18:47:44,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 18:47:44,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:47:44,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:47:44,652 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:47:44,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 18:47:44,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-15 18:47:44,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:47:44,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 18:47:44,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:47:45,568 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-15 18:47:45,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:47:46,039 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 26 proven. 29 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 18:47:46,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:47:46,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501403619] [2023-02-15 18:47:46,040 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:47:46,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53117411] [2023-02-15 18:47:46,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53117411] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:47:46,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:47:46,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 22 [2023-02-15 18:47:46,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760852570] [2023-02-15 18:47:46,041 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:47:46,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 18:47:46,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:47:46,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 18:47:46,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2023-02-15 18:47:46,042 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:47:51,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:47:51,794 INFO L93 Difference]: Finished difference Result 233 states and 290 transitions. [2023-02-15 18:47:51,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-02-15 18:47:51,794 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-02-15 18:47:51,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:47:51,795 INFO L225 Difference]: With dead ends: 233 [2023-02-15 18:47:51,795 INFO L226 Difference]: Without dead ends: 130 [2023-02-15 18:47:51,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1699 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1332, Invalid=4368, Unknown=0, NotChecked=0, Total=5700 [2023-02-15 18:47:51,797 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 167 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-15 18:47:51,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 88 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-15 18:47:51,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-02-15 18:47:51,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 89. [2023-02-15 18:47:51,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.2840909090909092) internal successors, (113), 88 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:47:51,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 113 transitions. [2023-02-15 18:47:51,820 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 113 transitions. Word has length 46 [2023-02-15 18:47:51,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:47:51,820 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 113 transitions. [2023-02-15 18:47:51,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:47:51,820 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 113 transitions. [2023-02-15 18:47:51,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 18:47:51,821 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:47:51,821 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:47:51,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 18:47:52,026 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 [2023-02-15 18:47:52,026 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:47:52,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:47:52,026 INFO L85 PathProgramCache]: Analyzing trace with hash -185545902, now seen corresponding path program 6 times [2023-02-15 18:47:52,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:47:52,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204656213] [2023-02-15 18:47:52,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:47:52,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:47:52,038 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:47:52,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1687367538] [2023-02-15 18:47:52,038 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 18:47:52,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:47:52,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:47:52,040 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 18:47:52,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 18:47:52,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-15 18:47:52,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:47:52,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 18:47:52,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:47:52,156 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-15 18:47:52,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:47:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-15 18:47:52,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:47:52,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204656213] [2023-02-15 18:47:52,312 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:47:52,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687367538] [2023-02-15 18:47:52,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687367538] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:47:52,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:47:52,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-02-15 18:47:52,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118317773] [2023-02-15 18:47:52,312 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:47:52,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 18:47:52,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:47:52,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 18:47:52,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-15 18:47:52,314 INFO L87 Difference]: Start difference. First operand 89 states and 113 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:47:52,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:47:52,883 INFO L93 Difference]: Finished difference Result 321 states and 401 transitions. [2023-02-15 18:47:52,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-15 18:47:52,884 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 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 46 [2023-02-15 18:47:52,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:47:52,884 INFO L225 Difference]: With dead ends: 321 [2023-02-15 18:47:52,885 INFO L226 Difference]: Without dead ends: 239 [2023-02-15 18:47:52,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=252, Invalid=870, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 18:47:52,886 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 299 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 18:47:52,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 87 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 18:47:52,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2023-02-15 18:47:52,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 99. [2023-02-15 18:47:52,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.2653061224489797) internal successors, (124), 98 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:47:52,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 124 transitions. [2023-02-15 18:47:52,914 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 124 transitions. Word has length 46 [2023-02-15 18:47:52,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:47:52,914 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 124 transitions. [2023-02-15 18:47:52,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:47:52,915 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 124 transitions. [2023-02-15 18:47:52,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 18:47:52,915 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:47:52,915 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:47:52,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-15 18:47:53,122 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 [2023-02-15 18:47:53,124 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:47:53,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:47:53,124 INFO L85 PathProgramCache]: Analyzing trace with hash -44997292, now seen corresponding path program 7 times [2023-02-15 18:47:53,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:47:53,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655253104] [2023-02-15 18:47:53,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:47:53,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:47:53,130 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:47:53,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [691086195] [2023-02-15 18:47:53,131 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 18:47:53,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:47:53,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:47:53,132 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) [2023-02-15 18:47:53,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 18:47:53,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:47:53,360 WARN L261 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 98 conjunts are in the unsatisfiable core [2023-02-15 18:47:53,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:47:53,487 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 20 treesize of output 16 [2023-02-15 18:47:53,633 INFO L321 Elim1Store]: treesize reduction 33, result has 28.3 percent of original size [2023-02-15 18:47:53,633 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 1 case distinctions, treesize of input 60 treesize of output 47 [2023-02-15 18:47:53,899 INFO L321 Elim1Store]: treesize reduction 66, result has 20.5 percent of original size [2023-02-15 18:47:53,900 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 44 treesize of output 42 [2023-02-15 18:47:54,157 INFO L321 Elim1Store]: treesize reduction 78, result has 17.9 percent of original size [2023-02-15 18:47:54,158 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 70 treesize of output 61 [2023-02-15 18:47:54,852 INFO L321 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2023-02-15 18:47:54,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 29 [2023-02-15 18:47:54,932 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:47:54,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:48:50,117 WARN L233 SmtUtils]: Spent 14.40s on a formula simplification. DAG size of input: 84 DAG size of output: 81 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 18:49:16,392 WARN L233 SmtUtils]: Spent 8.31s on a formula simplification that was a NOOP. DAG size: 94 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 18:49:26,028 WARN L233 SmtUtils]: Spent 8.08s on a formula simplification that was a NOOP. DAG size: 96 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 18:49:26,068 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 317 treesize of output 309 [2023-02-15 18:49:27,451 INFO L321 Elim1Store]: treesize reduction 10, result has 76.7 percent of original size [2023-02-15 18:49:27,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3372702522 treesize of output 3293010778