./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_copy2_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/standard_copy2_ground-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 910d8e768520d514eafd11bd6e0d202501f1eee040b6e70d07e33c173cc4a1ca --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 09:04:40,196 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 09:04:40,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 09:04:40,220 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 09:04:40,220 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 09:04:40,222 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 09:04:40,224 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 09:04:40,227 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 09:04:40,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 09:04:40,232 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 09:04:40,233 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 09:04:40,235 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 09:04:40,235 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 09:04:40,239 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 09:04:40,239 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 09:04:40,241 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 09:04:40,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 09:04:40,243 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 09:04:40,244 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 09:04:40,245 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 09:04:40,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 09:04:40,248 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 09:04:40,249 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 09:04:40,250 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 09:04:40,265 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 09:04:40,265 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 09:04:40,266 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 09:04:40,266 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 09:04:40,267 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 09:04:40,268 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 09:04:40,268 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 09:04:40,269 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 09:04:40,270 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 09:04:40,271 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 09:04:40,271 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 09:04:40,271 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 09:04:40,272 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 09:04:40,272 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 09:04:40,272 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 09:04:40,273 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 09:04:40,274 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 09:04:40,274 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 09:04:40,295 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 09:04:40,297 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 09:04:40,297 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 09:04:40,297 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 09:04:40,298 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 09:04:40,298 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 09:04:40,298 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 09:04:40,299 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 09:04:40,299 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 09:04:40,299 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 09:04:40,300 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 09:04:40,300 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 09:04:40,300 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 09:04:40,300 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 09:04:40,300 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 09:04:40,300 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 09:04:40,301 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 09:04:40,301 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 09:04:40,301 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 09:04:40,301 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 09:04:40,301 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 09:04:40,301 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 09:04:40,301 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 09:04:40,302 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 09:04:40,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 09:04:40,302 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 09:04:40,302 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 09:04:40,302 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 09:04:40,302 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 09:04:40,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 09:04:40,303 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 09:04:40,303 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 09:04:40,303 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 09:04:40,303 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 09:04:40,303 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 09:04:40,303 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 910d8e768520d514eafd11bd6e0d202501f1eee040b6e70d07e33c173cc4a1ca [2023-02-15 09:04:40,513 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 09:04:40,534 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 09:04:40,535 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 09:04:40,536 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 09:04:40,537 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 09:04:40,537 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy2_ground-2.i [2023-02-15 09:04:41,585 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 09:04:41,721 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 09:04:41,722 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy2_ground-2.i [2023-02-15 09:04:41,725 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b69cfdc65/42ec9e53922645a6ba2e6bf7f7abf7e0/FLAG915bdcf5c [2023-02-15 09:04:41,735 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b69cfdc65/42ec9e53922645a6ba2e6bf7f7abf7e0 [2023-02-15 09:04:41,737 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 09:04:41,738 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 09:04:41,738 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 09:04:41,739 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 09:04:41,741 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 09:04:41,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:04:41" (1/1) ... [2023-02-15 09:04:41,742 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c6acc0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:41, skipping insertion in model container [2023-02-15 09:04:41,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:04:41" (1/1) ... [2023-02-15 09:04:41,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 09:04:41,755 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 09:04:41,833 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-examples/standard_copy2_ground-2.i[816,829] [2023-02-15 09:04:41,845 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 09:04:41,850 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 09:04:41,858 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-examples/standard_copy2_ground-2.i[816,829] [2023-02-15 09:04:41,863 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 09:04:41,872 INFO L208 MainTranslator]: Completed translation [2023-02-15 09:04:41,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:41 WrapperNode [2023-02-15 09:04:41,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 09:04:41,873 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 09:04:41,873 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 09:04:41,873 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 09:04:41,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:41" (1/1) ... [2023-02-15 09:04:41,882 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:41" (1/1) ... [2023-02-15 09:04:41,893 INFO L138 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2023-02-15 09:04:41,894 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 09:04:41,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 09:04:41,894 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 09:04:41,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 09:04:41,900 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:41" (1/1) ... [2023-02-15 09:04:41,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:41" (1/1) ... [2023-02-15 09:04:41,901 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:41" (1/1) ... [2023-02-15 09:04:41,901 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:41" (1/1) ... [2023-02-15 09:04:41,904 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:41" (1/1) ... [2023-02-15 09:04:41,907 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:41" (1/1) ... [2023-02-15 09:04:41,908 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:41" (1/1) ... [2023-02-15 09:04:41,908 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:41" (1/1) ... [2023-02-15 09:04:41,909 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 09:04:41,910 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 09:04:41,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 09:04:41,910 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 09:04:41,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:41" (1/1) ... [2023-02-15 09:04:41,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 09:04:41,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:04:41,946 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 09:04:41,974 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 09:04:42,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 09:04:42,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 09:04:42,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 09:04:42,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 09:04:42,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 09:04:42,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 09:04:42,001 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 09:04:42,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 09:04:42,044 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 09:04:42,046 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 09:04:42,207 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 09:04:42,211 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 09:04:42,211 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-15 09:04:42,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:04:42 BoogieIcfgContainer [2023-02-15 09:04:42,212 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 09:04:42,214 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 09:04:42,214 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 09:04:42,216 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 09:04:42,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 09:04:41" (1/3) ... [2023-02-15 09:04:42,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3accc58e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:04:42, skipping insertion in model container [2023-02-15 09:04:42,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:04:41" (2/3) ... [2023-02-15 09:04:42,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3accc58e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:04:42, skipping insertion in model container [2023-02-15 09:04:42,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:04:42" (3/3) ... [2023-02-15 09:04:42,218 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy2_ground-2.i [2023-02-15 09:04:42,236 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 09:04:42,248 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 09:04:42,296 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 09:04:42,306 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;@40208bad, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 09:04:42,306 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 09:04:42,310 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 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 09:04:42,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 09:04:42,316 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:04:42,317 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:04:42,318 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:04:42,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:04:42,323 INFO L85 PathProgramCache]: Analyzing trace with hash -779788197, now seen corresponding path program 1 times [2023-02-15 09:04:42,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:04:42,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521480358] [2023-02-15 09:04:42,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:42,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:04:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:42,466 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 09:04:42,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:04:42,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521480358] [2023-02-15 09:04:42,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521480358] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:04:42,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 09:04:42,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 09:04:42,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11385488] [2023-02-15 09:04:42,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:04:42,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 09:04:42,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:04:42,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 09:04:42,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 09:04:42,505 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 09:04:42,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:04:42,533 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2023-02-15 09:04:42,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 09:04:42,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2023-02-15 09:04:42,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:04:42,540 INFO L225 Difference]: With dead ends: 40 [2023-02-15 09:04:42,540 INFO L226 Difference]: Without dead ends: 19 [2023-02-15 09:04:42,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 09:04:42,549 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:04:42,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:04:42,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-15 09:04:42,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2023-02-15 09:04:42,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:04:42,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2023-02-15 09:04:42,607 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2023-02-15 09:04:42,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:04:42,608 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2023-02-15 09:04:42,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 09:04:42,608 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2023-02-15 09:04:42,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-15 09:04:42,609 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:04:42,609 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:04:42,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 09:04:42,610 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:04:42,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:04:42,610 INFO L85 PathProgramCache]: Analyzing trace with hash 383923737, now seen corresponding path program 1 times [2023-02-15 09:04:42,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:04:42,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776142141] [2023-02-15 09:04:42,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:42,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:04:42,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:42,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:04:42,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:04:42,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776142141] [2023-02-15 09:04:42,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776142141] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:04:42,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57476906] [2023-02-15 09:04:42,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:42,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:04:42,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:04:42,690 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 09:04:42,709 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 09:04:42,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:42,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-15 09:04:42,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:04:42,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 09:04:42,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 09:04:42,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57476906] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:04:42,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 09:04:42,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-02-15 09:04:42,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420543257] [2023-02-15 09:04:42,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:04:42,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 09:04:42,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:04:42,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 09:04:42,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 09:04:42,784 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 09:04:42,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:04:42,798 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2023-02-15 09:04:42,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 09:04:42,799 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 13 [2023-02-15 09:04:42,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:04:42,799 INFO L225 Difference]: With dead ends: 32 [2023-02-15 09:04:42,799 INFO L226 Difference]: Without dead ends: 22 [2023-02-15 09:04:42,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 09:04:42,801 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:04:42,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 27 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:04:42,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-15 09:04:42,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2023-02-15 09:04:42,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 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 09:04:42,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-02-15 09:04:42,804 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2023-02-15 09:04:42,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:04:42,804 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-02-15 09:04:42,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 09:04:42,805 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-02-15 09:04:42,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-15 09:04:42,805 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:04:42,805 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:04:42,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 09:04:43,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:04:43,010 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:04:43,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:04:43,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1602849365, now seen corresponding path program 1 times [2023-02-15 09:04:43,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:04:43,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590954578] [2023-02-15 09:04:43,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:43,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:04:43,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:43,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 09:04:43,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:04:43,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590954578] [2023-02-15 09:04:43,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590954578] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:04:43,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566457326] [2023-02-15 09:04:43,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:43,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:04:43,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:04:43,082 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 09:04:43,083 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 09:04:43,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:43,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 09:04:43,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:04:43,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 09:04:43,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:04:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 09:04:43,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566457326] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:04:43,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:04:43,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-15 09:04:43,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13848166] [2023-02-15 09:04:43,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:04:43,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 09:04:43,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:04:43,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 09:04:43,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-15 09:04:43,218 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:04:43,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:04:43,234 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2023-02-15 09:04:43,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 09:04:43,234 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-15 09:04:43,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:04:43,235 INFO L225 Difference]: With dead ends: 41 [2023-02-15 09:04:43,235 INFO L226 Difference]: Without dead ends: 26 [2023-02-15 09:04:43,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-15 09:04:43,236 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:04:43,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 50 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:04:43,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-15 09:04:43,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-02-15 09:04:43,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 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 09:04:43,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-02-15 09:04:43,240 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2023-02-15 09:04:43,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:04:43,240 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-02-15 09:04:43,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:04:43,240 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-02-15 09:04:43,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 09:04:43,241 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:04:43,241 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:04:43,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-15 09:04:43,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-15 09:04:43,448 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:04:43,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:04:43,448 INFO L85 PathProgramCache]: Analyzing trace with hash 862458255, now seen corresponding path program 2 times [2023-02-15 09:04:43,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:04:43,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721897642] [2023-02-15 09:04:43,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:43,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:04:43,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:43,505 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-15 09:04:43,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:04:43,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721897642] [2023-02-15 09:04:43,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721897642] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:04:43,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224943225] [2023-02-15 09:04:43,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 09:04:43,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:04:43,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:04:43,515 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 09:04:43,560 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 09:04:43,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 09:04:43,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:04:43,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 09:04:43,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:04:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-15 09:04:43,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:04:43,654 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-15 09:04:43,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224943225] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:04:43,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:04:43,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-15 09:04:43,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068877939] [2023-02-15 09:04:43,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:04:43,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 09:04:43,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:04:43,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 09:04:43,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-15 09:04:43,657 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 09:04:43,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:04:43,692 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2023-02-15 09:04:43,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 09:04:43,693 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) Word has length 23 [2023-02-15 09:04:43,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:04:43,694 INFO L225 Difference]: With dead ends: 49 [2023-02-15 09:04:43,694 INFO L226 Difference]: Without dead ends: 38 [2023-02-15 09:04:43,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-15 09:04:43,696 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:04:43,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 60 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:04:43,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-02-15 09:04:43,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-02-15 09:04:43,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 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 09:04:43,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2023-02-15 09:04:43,706 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 23 [2023-02-15 09:04:43,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:04:43,706 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2023-02-15 09:04:43,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 09:04:43,706 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2023-02-15 09:04:43,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-15 09:04:43,707 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:04:43,707 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:04:43,716 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 09:04:43,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:04:43,912 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:04:43,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:04:43,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1441156285, now seen corresponding path program 3 times [2023-02-15 09:04:43,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:04:43,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515260668] [2023-02-15 09:04:43,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:43,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:04:43,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:44,088 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-15 09:04:44,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:04:44,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515260668] [2023-02-15 09:04:44,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515260668] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:04:44,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015342074] [2023-02-15 09:04:44,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 09:04:44,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:04:44,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:04:44,090 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 09:04:44,093 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 09:04:44,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-15 09:04:44,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:04:44,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 09:04:44,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:04:44,212 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-15 09:04:44,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:04:44,267 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-15 09:04:44,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015342074] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:04:44,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:04:44,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-15 09:04:44,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611065928] [2023-02-15 09:04:44,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:04:44,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 09:04:44,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:04:44,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 09:04:44,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-15 09:04:44,270 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:04:44,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:04:44,302 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2023-02-15 09:04:44,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 09:04:44,302 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-15 09:04:44,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:04:44,304 INFO L225 Difference]: With dead ends: 77 [2023-02-15 09:04:44,305 INFO L226 Difference]: Without dead ends: 50 [2023-02-15 09:04:44,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-15 09:04:44,305 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:04:44,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 50 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:04:44,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-15 09:04:44,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-02-15 09:04:44,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 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 09:04:44,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2023-02-15 09:04:44,318 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 35 [2023-02-15 09:04:44,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:04:44,318 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2023-02-15 09:04:44,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:04:44,318 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2023-02-15 09:04:44,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 09:04:44,320 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:04:44,320 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:04:44,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 09:04:44,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:04:44,525 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:04:44,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:04:44,526 INFO L85 PathProgramCache]: Analyzing trace with hash -100034249, now seen corresponding path program 4 times [2023-02-15 09:04:44,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:04:44,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408819415] [2023-02-15 09:04:44,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:44,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:04:44,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-15 09:04:44,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:04:44,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408819415] [2023-02-15 09:04:44,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408819415] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:04:44,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512995808] [2023-02-15 09:04:44,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 09:04:44,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:04:44,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:04:44,723 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 09:04:44,741 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 09:04:44,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 09:04:44,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:04:44,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 09:04:44,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:04:44,839 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-15 09:04:44,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:04:44,999 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-15 09:04:45,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512995808] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:04:45,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:04:45,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-15 09:04:45,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403731933] [2023-02-15 09:04:45,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:04:45,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-15 09:04:45,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:04:45,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-15 09:04:45,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-02-15 09:04:45,002 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:04:45,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:04:45,063 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2023-02-15 09:04:45,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 09:04:45,063 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-02-15 09:04:45,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:04:45,064 INFO L225 Difference]: With dead ends: 101 [2023-02-15 09:04:45,064 INFO L226 Difference]: Without dead ends: 74 [2023-02-15 09:04:45,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-02-15 09:04:45,065 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:04:45,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 66 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:04:45,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-02-15 09:04:45,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-02-15 09:04:45,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 states have internal predecessors, (77), 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 09:04:45,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2023-02-15 09:04:45,070 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 47 [2023-02-15 09:04:45,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:04:45,070 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2023-02-15 09:04:45,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:04:45,071 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2023-02-15 09:04:45,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-15 09:04:45,071 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:04:45,071 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:04:45,079 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 09:04:45,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:04:45,276 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:04:45,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:04:45,277 INFO L85 PathProgramCache]: Analyzing trace with hash -888767713, now seen corresponding path program 5 times [2023-02-15 09:04:45,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:04:45,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114725186] [2023-02-15 09:04:45,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:45,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:04:45,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:45,733 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-15 09:04:45,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:04:45,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114725186] [2023-02-15 09:04:45,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114725186] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:04:45,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565989301] [2023-02-15 09:04:45,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 09:04:45,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:04:45,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:04:45,736 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 09:04:45,738 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 09:04:55,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2023-02-15 09:04:55,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:04:55,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 09:04:55,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:04:55,263 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2023-02-15 09:04:55,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:04:55,371 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2023-02-15 09:04:55,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565989301] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:04:55,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:04:55,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2023-02-15 09:04:55,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292670951] [2023-02-15 09:04:55,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:04:55,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-15 09:04:55,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:04:55,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-15 09:04:55,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=825, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 09:04:55,374 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:04:55,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:04:55,476 INFO L93 Difference]: Finished difference Result 128 states and 146 transitions. [2023-02-15 09:04:55,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-15 09:04:55,476 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-02-15 09:04:55,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:04:55,477 INFO L225 Difference]: With dead ends: 128 [2023-02-15 09:04:55,477 INFO L226 Difference]: Without dead ends: 101 [2023-02-15 09:04:55,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=365, Invalid=825, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 09:04:55,478 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:04:55,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 68 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:04:55,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-02-15 09:04:55,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2023-02-15 09:04:55,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 99 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 09:04:55,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2023-02-15 09:04:55,484 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 71 [2023-02-15 09:04:55,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:04:55,485 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2023-02-15 09:04:55,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:04:55,485 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2023-02-15 09:04:55,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-02-15 09:04:55,486 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:04:55,486 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:04:55,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 09:04:55,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:04:55,696 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:04:55,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:04:55,697 INFO L85 PathProgramCache]: Analyzing trace with hash -2043147451, now seen corresponding path program 6 times [2023-02-15 09:04:55,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:04:55,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133826237] [2023-02-15 09:04:55,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:04:55,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:04:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:04:56,265 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-02-15 09:04:56,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:04:56,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133826237] [2023-02-15 09:04:56,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133826237] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:04:56,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886321056] [2023-02-15 09:04:56,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 09:04:56,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:04:56,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:04:56,267 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 09:04:56,269 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 09:05:14,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2023-02-15 09:05:14,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:05:14,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 09:05:14,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:05:14,450 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2023-02-15 09:05:14,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:05:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2023-02-15 09:05:14,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886321056] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:05:14,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:05:14,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 13, 13] total 48 [2023-02-15 09:05:14,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525244543] [2023-02-15 09:05:14,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:05:14,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-15 09:05:14,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:05:14,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-15 09:05:14,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=1656, Unknown=0, NotChecked=0, Total=2256 [2023-02-15 09:05:14,645 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 48 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 09:05:14,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:05:14,837 INFO L93 Difference]: Finished difference Result 202 states and 232 transitions. [2023-02-15 09:05:14,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-15 09:05:14,837 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 48 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) Word has length 97 [2023-02-15 09:05:14,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:05:14,839 INFO L225 Difference]: With dead ends: 202 [2023-02-15 09:05:14,839 INFO L226 Difference]: Without dead ends: 151 [2023-02-15 09:05:14,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=600, Invalid=1656, Unknown=0, NotChecked=0, Total=2256 [2023-02-15 09:05:14,841 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 50 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 09:05:14,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 86 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 09:05:14,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-02-15 09:05:14,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2023-02-15 09:05:14,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0268456375838926) internal successors, (153), 149 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:05:14,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 153 transitions. [2023-02-15 09:05:14,852 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 153 transitions. Word has length 97 [2023-02-15 09:05:14,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:05:14,852 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 153 transitions. [2023-02-15 09:05:14,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 48 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 09:05:14,852 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 153 transitions. [2023-02-15 09:05:14,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-02-15 09:05:14,854 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:05:14,854 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:05:14,868 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 09:05:15,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:05:15,062 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:05:15,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:05:15,062 INFO L85 PathProgramCache]: Analyzing trace with hash 163678547, now seen corresponding path program 7 times [2023-02-15 09:05:15,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:05:15,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397850411] [2023-02-15 09:05:15,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:05:15,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:05:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:05:15,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1544 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2023-02-15 09:05:15,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:05:15,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397850411] [2023-02-15 09:05:15,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397850411] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:05:15,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119887578] [2023-02-15 09:05:15,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 09:05:15,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:05:15,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:05:15,761 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 09:05:15,781 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 09:05:15,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:05:15,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-15 09:05:15,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:05:15,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1544 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2023-02-15 09:05:15,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:05:16,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1544 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2023-02-15 09:05:16,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119887578] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:05:16,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:05:16,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2023-02-15 09:05:16,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374208983] [2023-02-15 09:05:16,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:05:16,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-15 09:05:16,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:05:16,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-15 09:05:16,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2023-02-15 09:05:16,629 INFO L87 Difference]: Start difference. First operand 150 states and 153 transitions. Second operand has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 53 states have internal predecessors, (116), 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 09:05:16,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:05:16,721 INFO L93 Difference]: Finished difference Result 301 states and 332 transitions. [2023-02-15 09:05:16,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-02-15 09:05:16,722 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 53 states have internal predecessors, (116), 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 147 [2023-02-15 09:05:16,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:05:16,722 INFO L225 Difference]: With dead ends: 301 [2023-02-15 09:05:16,722 INFO L226 Difference]: Without dead ends: 202 [2023-02-15 09:05:16,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2023-02-15 09:05:16,724 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:05:16,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 82 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:05:16,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-02-15 09:05:16,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2023-02-15 09:05:16,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.0199004975124377) internal successors, (205), 201 states have internal predecessors, (205), 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 09:05:16,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 205 transitions. [2023-02-15 09:05:16,731 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 205 transitions. Word has length 147 [2023-02-15 09:05:16,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:05:16,732 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 205 transitions. [2023-02-15 09:05:16,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 53 states have internal predecessors, (116), 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 09:05:16,732 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 205 transitions. [2023-02-15 09:05:16,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-02-15 09:05:16,739 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:05:16,739 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:05:16,757 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 09:05:16,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-02-15 09:05:16,957 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:05:16,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:05:16,958 INFO L85 PathProgramCache]: Analyzing trace with hash -776127201, now seen corresponding path program 8 times [2023-02-15 09:05:16,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:05:16,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084098613] [2023-02-15 09:05:16,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:05:16,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:05:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:05:18,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3468 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2023-02-15 09:05:18,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:05:18,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084098613] [2023-02-15 09:05:18,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084098613] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:05:18,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528339925] [2023-02-15 09:05:18,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 09:05:18,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:05:18,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:05:18,913 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 09:05:18,952 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 09:05:19,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 09:05:19,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:05:19,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-15 09:05:19,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:05:19,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3468 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2023-02-15 09:05:19,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:05:21,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3468 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2023-02-15 09:05:21,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528339925] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:05:21,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:05:21,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 105 [2023-02-15 09:05:21,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369390764] [2023-02-15 09:05:21,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:05:21,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2023-02-15 09:05:21,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:05:21,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2023-02-15 09:05:21,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2023-02-15 09:05:21,496 INFO L87 Difference]: Start difference. First operand 202 states and 205 transitions. Second operand has 105 states, 105 states have (on average 2.0952380952380953) internal successors, (220), 105 states have internal predecessors, (220), 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 09:05:21,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:05:21,728 INFO L93 Difference]: Finished difference Result 405 states and 462 transitions. [2023-02-15 09:05:21,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2023-02-15 09:05:21,729 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.0952380952380953) internal successors, (220), 105 states have internal predecessors, (220), 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 199 [2023-02-15 09:05:21,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:05:21,732 INFO L225 Difference]: With dead ends: 405 [2023-02-15 09:05:21,732 INFO L226 Difference]: Without dead ends: 306 [2023-02-15 09:05:21,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2023-02-15 09:05:21,736 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 09:05:21,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 82 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 09:05:21,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2023-02-15 09:05:21,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 306. [2023-02-15 09:05:21,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.0131147540983607) internal successors, (309), 305 states have internal predecessors, (309), 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 09:05:21,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 309 transitions. [2023-02-15 09:05:21,748 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 309 transitions. Word has length 199 [2023-02-15 09:05:21,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:05:21,749 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 309 transitions. [2023-02-15 09:05:21,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.0952380952380953) internal successors, (220), 105 states have internal predecessors, (220), 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 09:05:21,749 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 309 transitions. [2023-02-15 09:05:21,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2023-02-15 09:05:21,751 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:05:21,751 INFO L195 NwaCegarLoop]: trace histogram [102, 102, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:05:21,759 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 09:05:21,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 09:05:21,958 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:05:21,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:05:21,959 INFO L85 PathProgramCache]: Analyzing trace with hash -148538697, now seen corresponding path program 9 times [2023-02-15 09:05:21,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:05:21,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051707213] [2023-02-15 09:05:21,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:05:21,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:05:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:05:27,410 INFO L134 CoverageAnalysis]: Checked inductivity of 11372 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2023-02-15 09:05:27,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:05:27,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051707213] [2023-02-15 09:05:27,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051707213] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:05:27,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282366090] [2023-02-15 09:05:27,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 09:05:27,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:05:27,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:05:27,421 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 09:05:27,423 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 09:06:02,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2023-02-15 09:06:02,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:06:02,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 09:06:02,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:06:03,352 INFO L134 CoverageAnalysis]: Checked inductivity of 11372 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 10888 trivial. 0 not checked. [2023-02-15 09:06:03,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:06:04,416 INFO L134 CoverageAnalysis]: Checked inductivity of 11372 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 10888 trivial. 0 not checked. [2023-02-15 09:06:04,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282366090] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:06:04,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:06:04,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 25, 25] total 151 [2023-02-15 09:06:04,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436521268] [2023-02-15 09:06:04,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:06:04,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2023-02-15 09:06:04,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:06:04,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2023-02-15 09:06:04,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6587, Invalid=16063, Unknown=0, NotChecked=0, Total=22650 [2023-02-15 09:06:04,425 INFO L87 Difference]: Start difference. First operand 306 states and 309 transitions. Second operand has 151 states, 151 states have (on average 2.1125827814569536) internal successors, (319), 151 states have internal predecessors, (319), 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 09:06:04,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:06:04,884 INFO L93 Difference]: Finished difference Result 504 states and 558 transitions. [2023-02-15 09:06:04,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2023-02-15 09:06:04,885 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 2.1125827814569536) internal successors, (319), 151 states have internal predecessors, (319), 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 303 [2023-02-15 09:06:04,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:06:04,889 INFO L225 Difference]: With dead ends: 504 [2023-02-15 09:06:04,889 INFO L226 Difference]: Without dead ends: 405 [2023-02-15 09:06:04,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 709 GetRequests, 560 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4692 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=6587, Invalid=16063, Unknown=0, NotChecked=0, Total=22650 [2023-02-15 09:06:04,893 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 157 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 09:06:04,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 128 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 09:06:04,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2023-02-15 09:06:04,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 404. [2023-02-15 09:06:04,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 1.0099255583126552) internal successors, (407), 403 states have internal predecessors, (407), 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 09:06:04,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 407 transitions. [2023-02-15 09:06:04,907 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 407 transitions. Word has length 303 [2023-02-15 09:06:04,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:06:04,908 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 407 transitions. [2023-02-15 09:06:04,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 2.1125827814569536) internal successors, (319), 151 states have internal predecessors, (319), 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 09:06:04,908 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 407 transitions. [2023-02-15 09:06:04,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2023-02-15 09:06:04,912 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:06:04,912 INFO L195 NwaCegarLoop]: trace histogram [103, 103, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:06:04,945 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 09:06:05,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-15 09:06:05,130 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:06:05,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:06:05,130 INFO L85 PathProgramCache]: Analyzing trace with hash 521897749, now seen corresponding path program 10 times [2023-02-15 09:06:05,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:06:05,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546593603] [2023-02-15 09:06:05,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:06:05,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:06:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:06:11,149 INFO L134 CoverageAnalysis]: Checked inductivity of 14841 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2023-02-15 09:06:11,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:06:11,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546593603] [2023-02-15 09:06:11,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546593603] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:06:11,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288402171] [2023-02-15 09:06:11,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 09:06:11,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:06:11,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:06:11,151 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 09:06:11,153 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 09:06:11,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 09:06:11,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:06:11,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 1653 conjuncts, 105 conjunts are in the unsatisfiable core [2023-02-15 09:06:11,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:06:11,826 INFO L134 CoverageAnalysis]: Checked inductivity of 14841 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2023-02-15 09:06:11,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:06:19,046 INFO L134 CoverageAnalysis]: Checked inductivity of 14841 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2023-02-15 09:06:19,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288402171] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:06:19,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:06:19,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106, 106] total 211 [2023-02-15 09:06:19,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886634994] [2023-02-15 09:06:19,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:06:19,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 211 states [2023-02-15 09:06:19,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:06:19,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 211 interpolants. [2023-02-15 09:06:19,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22155, Invalid=22155, Unknown=0, NotChecked=0, Total=44310 [2023-02-15 09:06:19,053 INFO L87 Difference]: Start difference. First operand 404 states and 407 transitions. Second operand has 211 states, 211 states have (on average 2.0473933649289098) internal successors, (432), 211 states have internal predecessors, (432), 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 09:06:19,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:06:19,635 INFO L93 Difference]: Finished difference Result 809 states and 919 transitions. [2023-02-15 09:06:19,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2023-02-15 09:06:19,636 INFO L78 Accepts]: Start accepts. Automaton has has 211 states, 211 states have (on average 2.0473933649289098) internal successors, (432), 211 states have internal predecessors, (432), 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 401 [2023-02-15 09:06:19,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:06:19,638 INFO L225 Difference]: With dead ends: 809 [2023-02-15 09:06:19,638 INFO L226 Difference]: Without dead ends: 614 [2023-02-15 09:06:19,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 697 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=22155, Invalid=22155, Unknown=0, NotChecked=0, Total=44310 [2023-02-15 09:06:19,640 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 09:06:19,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 66 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 09:06:19,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2023-02-15 09:06:19,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2023-02-15 09:06:19,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 1.0065252854812399) internal successors, (617), 613 states have internal predecessors, (617), 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 09:06:19,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 617 transitions. [2023-02-15 09:06:19,651 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 617 transitions. Word has length 401 [2023-02-15 09:06:19,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:06:19,651 INFO L495 AbstractCegarLoop]: Abstraction has 614 states and 617 transitions. [2023-02-15 09:06:19,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 211 states, 211 states have (on average 2.0473933649289098) internal successors, (432), 211 states have internal predecessors, (432), 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 09:06:19,652 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 617 transitions. [2023-02-15 09:06:19,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2023-02-15 09:06:19,655 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:06:19,655 INFO L195 NwaCegarLoop]: trace histogram [208, 208, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:06:19,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-15 09:06:19,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-15 09:06:19,862 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:06:19,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:06:19,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1397788285, now seen corresponding path program 11 times [2023-02-15 09:06:19,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:06:19,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931574904] [2023-02-15 09:06:19,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:06:19,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:06:20,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:06:40,365 INFO L134 CoverageAnalysis]: Checked inductivity of 47496 backedges. 0 proven. 43264 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2023-02-15 09:06:40,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:06:40,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931574904] [2023-02-15 09:06:40,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931574904] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:06:40,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482969131] [2023-02-15 09:06:40,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 09:06:40,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:06:40,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:06:40,367 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 09:06:40,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process