./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/theatreSquare.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3dbbec33 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/loops-crafted-1/theatreSquare.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 90f363148c6ea94b18bb0ae0702d2476b109719554576ef0704192e7e62145c3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3dbbec3 [2023-02-14 11:43:13,168 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 11:43:13,171 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 11:43:13,209 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 11:43:13,209 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 11:43:13,212 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 11:43:13,214 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 11:43:13,216 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 11:43:13,218 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 11:43:13,223 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 11:43:13,224 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 11:43:13,226 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 11:43:13,226 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 11:43:13,228 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 11:43:13,229 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 11:43:13,230 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 11:43:13,231 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 11:43:13,232 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 11:43:13,234 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 11:43:13,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 11:43:13,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 11:43:13,241 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 11:43:13,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 11:43:13,243 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 11:43:13,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 11:43:13,251 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 11:43:13,251 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 11:43:13,252 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 11:43:13,253 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 11:43:13,253 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 11:43:13,254 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 11:43:13,254 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 11:43:13,256 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 11:43:13,257 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 11:43:13,258 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 11:43:13,258 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 11:43:13,259 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 11:43:13,259 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 11:43:13,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 11:43:13,260 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 11:43:13,261 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 11:43:13,262 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 11:43:13,288 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 11:43:13,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 11:43:13,289 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 11:43:13,289 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 11:43:13,290 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 11:43:13,290 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 11:43:13,291 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 11:43:13,291 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 11:43:13,291 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 11:43:13,291 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 11:43:13,292 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 11:43:13,293 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 11:43:13,293 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 11:43:13,293 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 11:43:13,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 11:43:13,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 11:43:13,293 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 11:43:13,294 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 11:43:13,294 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 11:43:13,294 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 11:43:13,294 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 11:43:13,294 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 11:43:13,294 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 11:43:13,295 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 11:43:13,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 11:43:13,295 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 11:43:13,295 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 11:43:13,295 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 11:43:13,295 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 11:43:13,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 11:43:13,296 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 11:43:13,296 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 11:43:13,296 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 11:43:13,296 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 11:43:13,297 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 11:43:13,297 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 90f363148c6ea94b18bb0ae0702d2476b109719554576ef0704192e7e62145c3 [2023-02-14 11:43:13,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 11:43:13,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 11:43:13,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 11:43:13,560 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 11:43:13,561 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 11:43:13,562 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/theatreSquare.c [2023-02-14 11:43:14,707 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 11:43:14,880 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 11:43:14,881 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/theatreSquare.c [2023-02-14 11:43:14,890 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3cf4db9e/f2cffabbb1ca4c0ba7cc0c52ca925395/FLAG8f9937df0 [2023-02-14 11:43:14,907 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3cf4db9e/f2cffabbb1ca4c0ba7cc0c52ca925395 [2023-02-14 11:43:14,909 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 11:43:14,911 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 11:43:14,914 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 11:43:14,914 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 11:43:14,919 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 11:43:14,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:43:14" (1/1) ... [2023-02-14 11:43:14,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18e9c8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:43:14, skipping insertion in model container [2023-02-14 11:43:14,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:43:14" (1/1) ... [2023-02-14 11:43:14,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 11:43:14,947 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 11:43:15,073 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/loops-crafted-1/theatreSquare.c[370,383] [2023-02-14 11:43:15,089 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 11:43:15,098 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 11:43:15,106 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/loops-crafted-1/theatreSquare.c[370,383] [2023-02-14 11:43:15,114 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 11:43:15,124 INFO L208 MainTranslator]: Completed translation [2023-02-14 11:43:15,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:43:15 WrapperNode [2023-02-14 11:43:15,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 11:43:15,126 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 11:43:15,126 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 11:43:15,126 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 11:43:15,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:43:15" (1/1) ... [2023-02-14 11:43:15,136 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:43:15" (1/1) ... [2023-02-14 11:43:15,152 INFO L138 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 100 [2023-02-14 11:43:15,152 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 11:43:15,153 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 11:43:15,153 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 11:43:15,153 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 11:43:15,159 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:43:15" (1/1) ... [2023-02-14 11:43:15,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:43:15" (1/1) ... [2023-02-14 11:43:15,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:43:15" (1/1) ... [2023-02-14 11:43:15,161 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:43:15" (1/1) ... [2023-02-14 11:43:15,164 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:43:15" (1/1) ... [2023-02-14 11:43:15,167 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:43:15" (1/1) ... [2023-02-14 11:43:15,168 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:43:15" (1/1) ... [2023-02-14 11:43:15,169 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:43:15" (1/1) ... [2023-02-14 11:43:15,171 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 11:43:15,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 11:43:15,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 11:43:15,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 11:43:15,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:43:15" (1/1) ... [2023-02-14 11:43:15,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 11:43:15,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:15,205 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) [2023-02-14 11:43:15,211 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 [2023-02-14 11:43:15,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 11:43:15,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 11:43:15,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 11:43:15,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 11:43:15,285 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 11:43:15,289 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 11:43:15,479 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 11:43:15,486 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 11:43:15,487 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2023-02-14 11:43:15,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:43:15 BoogieIcfgContainer [2023-02-14 11:43:15,489 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 11:43:15,498 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 11:43:15,498 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 11:43:15,501 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 11:43:15,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 11:43:14" (1/3) ... [2023-02-14 11:43:15,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bd4b13b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:43:15, skipping insertion in model container [2023-02-14 11:43:15,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:43:15" (2/3) ... [2023-02-14 11:43:15,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bd4b13b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:43:15, skipping insertion in model container [2023-02-14 11:43:15,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:43:15" (3/3) ... [2023-02-14 11:43:15,513 INFO L112 eAbstractionObserver]: Analyzing ICFG theatreSquare.c [2023-02-14 11:43:15,542 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 11:43:15,543 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 11:43:15,602 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 11:43:15,608 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;@25089fdf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 11:43:15,608 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 11:43:15,612 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 22 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) [2023-02-14 11:43:15,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-14 11:43:15,625 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:15,625 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-14 11:43:15,626 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:15,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:15,630 INFO L85 PathProgramCache]: Analyzing trace with hash 891969447, now seen corresponding path program 1 times [2023-02-14 11:43:15,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:15,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459363973] [2023-02-14 11:43:15,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:15,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:15,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:15,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:43:15,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:15,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459363973] [2023-02-14 11:43:15,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459363973] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 11:43:15,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 11:43:15,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 11:43:15,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107874517] [2023-02-14 11:43:15,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:43:15,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 11:43:15,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:15,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 11:43:15,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 11:43:15,898 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 22 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) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2023-02-14 11:43:15,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:15,974 INFO L93 Difference]: Finished difference Result 48 states and 71 transitions. [2023-02-14 11:43:15,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 11:43:15,978 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2023-02-14 11:43:15,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:15,985 INFO L225 Difference]: With dead ends: 48 [2023-02-14 11:43:15,986 INFO L226 Difference]: Without dead ends: 19 [2023-02-14 11:43:15,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 11:43:15,992 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 21 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:15,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 65 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:43:16,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-14 11:43:16,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-02-14 11:43:16,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:16,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2023-02-14 11:43:16,023 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 6 [2023-02-14 11:43:16,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:16,024 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2023-02-14 11:43:16,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2023-02-14 11:43:16,024 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2023-02-14 11:43:16,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-14 11:43:16,025 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:16,025 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:16,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 11:43:16,026 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:16,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:16,027 INFO L85 PathProgramCache]: Analyzing trace with hash 535820783, now seen corresponding path program 1 times [2023-02-14 11:43:16,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:16,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322754010] [2023-02-14 11:43:16,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:16,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:16,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:16,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:43:16,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:16,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322754010] [2023-02-14 11:43:16,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322754010] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 11:43:16,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 11:43:16,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-14 11:43:16,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121169495] [2023-02-14 11:43:16,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:43:16,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 11:43:16,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:16,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 11:43:16,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-02-14 11:43:16,295 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:16,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:16,455 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2023-02-14 11:43:16,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 11:43:16,456 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-14 11:43:16,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:16,457 INFO L225 Difference]: With dead ends: 39 [2023-02-14 11:43:16,457 INFO L226 Difference]: Without dead ends: 33 [2023-02-14 11:43:16,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-02-14 11:43:16,459 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 70 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:16,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 133 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:43:16,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-14 11:43:16,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2023-02-14 11:43:16,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:16,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2023-02-14 11:43:16,470 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 18 [2023-02-14 11:43:16,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:16,471 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2023-02-14 11:43:16,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:16,472 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2023-02-14 11:43:16,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-14 11:43:16,475 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:16,476 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:16,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 11:43:16,477 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:16,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:16,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1031838486, now seen corresponding path program 1 times [2023-02-14 11:43:16,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:16,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422119603] [2023-02-14 11:43:16,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:16,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:16,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:16,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:43:16,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:16,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422119603] [2023-02-14 11:43:16,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422119603] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 11:43:16,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 11:43:16,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 11:43:16,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606382521] [2023-02-14 11:43:16,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:43:16,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 11:43:16,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:16,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 11:43:16,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-14 11:43:16,571 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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) [2023-02-14 11:43:16,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:16,590 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2023-02-14 11:43:16,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 11:43:16,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 19 [2023-02-14 11:43:16,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:16,591 INFO L225 Difference]: With dead ends: 47 [2023-02-14 11:43:16,592 INFO L226 Difference]: Without dead ends: 37 [2023-02-14 11:43:16,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-14 11:43:16,594 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:16,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 61 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:43:16,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-14 11:43:16,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2023-02-14 11:43:16,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 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) [2023-02-14 11:43:16,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2023-02-14 11:43:16,604 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 19 [2023-02-14 11:43:16,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:16,604 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2023-02-14 11:43:16,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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) [2023-02-14 11:43:16,604 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2023-02-14 11:43:16,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-14 11:43:16,605 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:16,605 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:16,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-14 11:43:16,606 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:16,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:16,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1782670069, now seen corresponding path program 1 times [2023-02-14 11:43:16,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:16,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717375791] [2023-02-14 11:43:16,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:16,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:16,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:16,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:43:16,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:16,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717375791] [2023-02-14 11:43:16,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717375791] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 11:43:16,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 11:43:16,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 11:43:16,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171960611] [2023-02-14 11:43:16,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:43:16,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 11:43:16,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:16,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 11:43:16,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-14 11:43:16,655 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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) [2023-02-14 11:43:16,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:16,670 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2023-02-14 11:43:16,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 11:43:16,670 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 19 [2023-02-14 11:43:16,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:16,671 INFO L225 Difference]: With dead ends: 66 [2023-02-14 11:43:16,671 INFO L226 Difference]: Without dead ends: 49 [2023-02-14 11:43:16,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-14 11:43:16,672 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 16 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:16,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 61 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:43:16,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-02-14 11:43:16,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2023-02-14 11:43:16,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 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) [2023-02-14 11:43:16,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2023-02-14 11:43:16,680 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 19 [2023-02-14 11:43:16,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:16,680 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2023-02-14 11:43:16,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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) [2023-02-14 11:43:16,680 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2023-02-14 11:43:16,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-14 11:43:16,681 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:16,681 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:16,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-14 11:43:16,682 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:16,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:16,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1545632287, now seen corresponding path program 1 times [2023-02-14 11:43:16,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:16,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772361600] [2023-02-14 11:43:16,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:16,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:16,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:43:16,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:16,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772361600] [2023-02-14 11:43:16,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772361600] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 11:43:16,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 11:43:16,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 11:43:16,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125139933] [2023-02-14 11:43:16,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:43:16,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 11:43:16,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:16,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 11:43:16,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 11:43:16,731 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2023-02-14 11:43:16,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:16,749 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2023-02-14 11:43:16,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 11:43:16,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 20 [2023-02-14 11:43:16,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:16,750 INFO L225 Difference]: With dead ends: 65 [2023-02-14 11:43:16,750 INFO L226 Difference]: Without dead ends: 37 [2023-02-14 11:43:16,750 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 [2023-02-14 11:43:16,751 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:16,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:43:16,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-14 11:43:16,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-02-14 11:43:16,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 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) [2023-02-14 11:43:16,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2023-02-14 11:43:16,757 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 20 [2023-02-14 11:43:16,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:16,757 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2023-02-14 11:43:16,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2023-02-14 11:43:16,757 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2023-02-14 11:43:16,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-14 11:43:16,758 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:16,758 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:16,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-14 11:43:16,758 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:16,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:16,759 INFO L85 PathProgramCache]: Analyzing trace with hash -2031253980, now seen corresponding path program 1 times [2023-02-14 11:43:16,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:16,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795598564] [2023-02-14 11:43:16,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:16,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:16,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:16,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 11:43:16,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:16,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795598564] [2023-02-14 11:43:16,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795598564] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 11:43:16,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 11:43:16,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 11:43:16,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570317662] [2023-02-14 11:43:16,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:43:16,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 11:43:16,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:16,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 11:43:16,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 11:43:16,854 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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) [2023-02-14 11:43:16,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:16,863 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2023-02-14 11:43:16,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 11:43:16,865 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-14 11:43:16,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:16,866 INFO L225 Difference]: With dead ends: 51 [2023-02-14 11:43:16,867 INFO L226 Difference]: Without dead ends: 33 [2023-02-14 11:43:16,868 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 [2023-02-14 11:43:16,869 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:16,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:43:16,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-14 11:43:16,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-02-14 11:43:16,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:16,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2023-02-14 11:43:16,878 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 21 [2023-02-14 11:43:16,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:16,878 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2023-02-14 11:43:16,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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) [2023-02-14 11:43:16,878 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2023-02-14 11:43:16,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-14 11:43:16,879 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:16,879 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:16,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-14 11:43:16,879 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:16,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:16,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1130312570, now seen corresponding path program 1 times [2023-02-14 11:43:16,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:16,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638802058] [2023-02-14 11:43:16,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:16,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:16,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:16,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 11:43:16,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:16,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638802058] [2023-02-14 11:43:16,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638802058] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 11:43:16,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 11:43:16,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 11:43:16,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660805748] [2023-02-14 11:43:16,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:43:16,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 11:43:16,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:16,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 11:43:16,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 11:43:16,933 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:16,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:16,964 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2023-02-14 11:43:16,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 11:43:16,967 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-14 11:43:16,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:16,968 INFO L225 Difference]: With dead ends: 39 [2023-02-14 11:43:16,968 INFO L226 Difference]: Without dead ends: 30 [2023-02-14 11:43:16,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 11:43:16,969 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 44 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 [2023-02-14 11:43:16,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 44 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:43:16,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-14 11:43:16,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-02-14 11:43:16,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:16,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2023-02-14 11:43:16,977 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 21 [2023-02-14 11:43:16,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:16,977 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2023-02-14 11:43:16,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:16,978 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2023-02-14 11:43:16,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-14 11:43:16,978 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:16,978 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:16,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-14 11:43:16,979 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:16,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:16,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1437483694, now seen corresponding path program 1 times [2023-02-14 11:43:16,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:16,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100466491] [2023-02-14 11:43:16,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:16,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:16,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:17,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 11:43:17,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:17,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100466491] [2023-02-14 11:43:17,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100466491] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:17,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023813488] [2023-02-14 11:43:17,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:17,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:17,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:17,051 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) [2023-02-14 11:43:17,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 11:43:17,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:17,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-14 11:43:17,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:17,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 11:43:17,156 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 11:43:17,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023813488] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 11:43:17,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 11:43:17,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-02-14 11:43:17,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058723785] [2023-02-14 11:43:17,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:43:17,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 11:43:17,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:17,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 11:43:17,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-14 11:43:17,158 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:17,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:17,168 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2023-02-14 11:43:17,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 11:43:17,168 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-14 11:43:17,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:17,169 INFO L225 Difference]: With dead ends: 37 [2023-02-14 11:43:17,169 INFO L226 Difference]: Without dead ends: 23 [2023-02-14 11:43:17,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-14 11:43:17,170 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 34 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:17,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 40 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:43:17,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-14 11:43:17,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-02-14 11:43:17,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:17,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2023-02-14 11:43:17,174 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 22 [2023-02-14 11:43:17,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:17,174 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2023-02-14 11:43:17,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:17,175 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2023-02-14 11:43:17,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-14 11:43:17,175 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:17,176 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:17,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 11:43:17,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:17,384 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:17,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:17,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1965889039, now seen corresponding path program 1 times [2023-02-14 11:43:17,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:17,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168471575] [2023-02-14 11:43:17,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:17,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:17,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:17,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 11:43:17,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:17,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168471575] [2023-02-14 11:43:17,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168471575] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:17,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818368125] [2023-02-14 11:43:17,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:17,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:17,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:17,441 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) [2023-02-14 11:43:17,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 11:43:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:17,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-14 11:43:17,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:17,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:17,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 11:43:17,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818368125] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 11:43:17,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 11:43:17,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-02-14 11:43:17,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712145018] [2023-02-14 11:43:17,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:43:17,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 11:43:17,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:17,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 11:43:17,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-14 11:43:17,578 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:17,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:17,593 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2023-02-14 11:43:17,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 11:43:17,596 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-14 11:43:17,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:17,596 INFO L225 Difference]: With dead ends: 32 [2023-02-14 11:43:17,596 INFO L226 Difference]: Without dead ends: 24 [2023-02-14 11:43:17,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-02-14 11:43:17,599 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 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 [2023-02-14 11:43:17,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 42 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:43:17,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-14 11:43:17,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-14 11:43:17,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 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) [2023-02-14 11:43:17,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-02-14 11:43:17,614 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 22 [2023-02-14 11:43:17,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:17,616 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-02-14 11:43:17,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:17,616 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-02-14 11:43:17,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-14 11:43:17,617 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:17,617 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:17,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 11:43:17,823 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,SelfDestructingSolverStorable8 [2023-02-14 11:43:17,823 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:17,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:17,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1829813877, now seen corresponding path program 1 times [2023-02-14 11:43:17,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:17,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288124705] [2023-02-14 11:43:17,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:17,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:17,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:17,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:17,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:17,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288124705] [2023-02-14 11:43:17,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288124705] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:17,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438142986] [2023-02-14 11:43:17,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:17,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:17,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:17,885 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) [2023-02-14 11:43:17,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 11:43:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:17,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-14 11:43:17,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:17,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:17,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 11:43:17,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438142986] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 11:43:17,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 11:43:17,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-02-14 11:43:17,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337999650] [2023-02-14 11:43:17,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:43:17,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 11:43:17,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:17,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 11:43:17,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-14 11:43:17,987 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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) [2023-02-14 11:43:18,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:18,001 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2023-02-14 11:43:18,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 11:43:18,002 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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) Word has length 23 [2023-02-14 11:43:18,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:18,004 INFO L225 Difference]: With dead ends: 31 [2023-02-14 11:43:18,004 INFO L226 Difference]: Without dead ends: 25 [2023-02-14 11:43:18,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-14 11:43:18,005 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:18,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 51 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:43:18,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-14 11:43:18,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-02-14 11:43:18,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:18,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2023-02-14 11:43:18,020 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 23 [2023-02-14 11:43:18,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:18,020 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2023-02-14 11:43:18,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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) [2023-02-14 11:43:18,020 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2023-02-14 11:43:18,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-14 11:43:18,022 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:18,022 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:18,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 11:43:18,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:18,229 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:18,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:18,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1804048560, now seen corresponding path program 1 times [2023-02-14 11:43:18,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:18,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641327024] [2023-02-14 11:43:18,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:18,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:18,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:18,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:43:18,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:18,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641327024] [2023-02-14 11:43:18,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641327024] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:18,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652042078] [2023-02-14 11:43:18,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:18,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:18,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:18,524 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) [2023-02-14 11:43:18,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 11:43:18,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:18,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-14 11:43:18,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:18,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:43:18,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:43:18,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:43:18,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652042078] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:43:18,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:43:18,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 23 [2023-02-14 11:43:18,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610815052] [2023-02-14 11:43:18,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:43:18,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-14 11:43:18,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:18,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-14 11:43:18,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2023-02-14 11:43:18,938 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 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) [2023-02-14 11:43:19,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:19,328 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2023-02-14 11:43:19,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-14 11:43:19,329 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 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) Word has length 24 [2023-02-14 11:43:19,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:19,329 INFO L225 Difference]: With dead ends: 77 [2023-02-14 11:43:19,329 INFO L226 Difference]: Without dead ends: 71 [2023-02-14 11:43:19,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=1072, Unknown=0, NotChecked=0, Total=1260 [2023-02-14 11:43:19,331 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 138 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:19,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 270 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 11:43:19,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-02-14 11:43:19,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 37. [2023-02-14 11:43:19,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 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) [2023-02-14 11:43:19,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2023-02-14 11:43:19,338 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 24 [2023-02-14 11:43:19,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:19,338 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2023-02-14 11:43:19,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 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) [2023-02-14 11:43:19,339 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2023-02-14 11:43:19,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-14 11:43:19,339 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:19,339 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:19,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 11:43:19,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:19,546 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:19,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:19,546 INFO L85 PathProgramCache]: Analyzing trace with hash 571706934, now seen corresponding path program 2 times [2023-02-14 11:43:19,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:19,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764542302] [2023-02-14 11:43:19,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:19,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:19,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:19,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:19,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:19,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764542302] [2023-02-14 11:43:19,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764542302] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:19,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107648158] [2023-02-14 11:43:19,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 11:43:19,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:19,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:19,678 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) [2023-02-14 11:43:19,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 11:43:19,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:43:19,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:43:19,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 11:43:19,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:19,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:19,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:43:19,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:19,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107648158] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:43:19,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:43:19,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-14 11:43:19,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499378808] [2023-02-14 11:43:19,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:43:19,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-14 11:43:19,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:19,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-14 11:43:19,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-02-14 11:43:19,922 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:20,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:20,001 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2023-02-14 11:43:20,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 11:43:20,001 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-14 11:43:20,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:20,002 INFO L225 Difference]: With dead ends: 63 [2023-02-14 11:43:20,002 INFO L226 Difference]: Without dead ends: 53 [2023-02-14 11:43:20,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2023-02-14 11:43:20,003 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 72 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:20,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 159 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:43:20,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-14 11:43:20,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2023-02-14 11:43:20,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.255813953488372) internal successors, (54), 43 states have internal predecessors, (54), 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) [2023-02-14 11:43:20,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2023-02-14 11:43:20,019 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 25 [2023-02-14 11:43:20,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:20,020 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2023-02-14 11:43:20,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:20,020 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2023-02-14 11:43:20,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-14 11:43:20,021 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:20,021 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:20,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 11:43:20,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-14 11:43:20,227 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:20,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:20,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1510332885, now seen corresponding path program 3 times [2023-02-14 11:43:20,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:20,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634385986] [2023-02-14 11:43:20,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:20,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:20,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:20,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:20,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634385986] [2023-02-14 11:43:20,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634385986] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:20,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701920143] [2023-02-14 11:43:20,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 11:43:20,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:20,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:20,305 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) [2023-02-14 11:43:20,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 11:43:20,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-14 11:43:20,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:43:20,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-14 11:43:20,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:20,407 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:20,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:43:20,438 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:20,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701920143] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:43:20,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:43:20,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-02-14 11:43:20,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298024246] [2023-02-14 11:43:20,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:43:20,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-14 11:43:20,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:20,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-14 11:43:20,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-02-14 11:43:20,441 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:20,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:20,473 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2023-02-14 11:43:20,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 11:43:20,474 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-14 11:43:20,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:20,476 INFO L225 Difference]: With dead ends: 72 [2023-02-14 11:43:20,476 INFO L226 Difference]: Without dead ends: 60 [2023-02-14 11:43:20,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-02-14 11:43:20,477 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:20,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 99 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:43:20,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-14 11:43:20,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2023-02-14 11:43:20,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 53 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:20,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2023-02-14 11:43:20,489 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 25 [2023-02-14 11:43:20,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:20,490 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2023-02-14 11:43:20,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:20,490 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2023-02-14 11:43:20,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-14 11:43:20,494 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:20,494 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:20,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 11:43:20,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:20,701 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:20,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:20,701 INFO L85 PathProgramCache]: Analyzing trace with hash 595735960, now seen corresponding path program 4 times [2023-02-14 11:43:20,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:20,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458055610] [2023-02-14 11:43:20,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:20,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:20,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:20,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:20,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:20,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458055610] [2023-02-14 11:43:20,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458055610] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:20,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967317348] [2023-02-14 11:43:20,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 11:43:20,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:20,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:20,765 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) [2023-02-14 11:43:20,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 11:43:20,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 11:43:20,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:43:20,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-14 11:43:20,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:20,853 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:20,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:43:20,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:20,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967317348] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:43:20,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:43:20,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-02-14 11:43:20,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856703020] [2023-02-14 11:43:20,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:43:20,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-14 11:43:20,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:20,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-14 11:43:20,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-02-14 11:43:20,879 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:20,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:20,908 INFO L93 Difference]: Finished difference Result 126 states and 157 transitions. [2023-02-14 11:43:20,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 11:43:20,909 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-14 11:43:20,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:20,910 INFO L225 Difference]: With dead ends: 126 [2023-02-14 11:43:20,910 INFO L226 Difference]: Without dead ends: 94 [2023-02-14 11:43:20,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-02-14 11:43:20,911 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 58 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:20,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 103 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:43:20,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-14 11:43:20,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 64. [2023-02-14 11:43:20,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 63 states have internal predecessors, (80), 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) [2023-02-14 11:43:20,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2023-02-14 11:43:20,925 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 25 [2023-02-14 11:43:20,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:20,925 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2023-02-14 11:43:20,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:20,925 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2023-02-14 11:43:20,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-14 11:43:20,926 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:20,926 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:20,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 11:43:21,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:21,132 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:21,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:21,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1299373655, now seen corresponding path program 5 times [2023-02-14 11:43:21,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:21,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372766928] [2023-02-14 11:43:21,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:21,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:21,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:21,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:21,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:21,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372766928] [2023-02-14 11:43:21,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372766928] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:21,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388450427] [2023-02-14 11:43:21,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 11:43:21,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:21,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:21,289 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) [2023-02-14 11:43:21,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 11:43:21,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:43:21,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:43:21,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 11:43:21,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:21,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:21,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:43:21,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:21,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388450427] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:43:21,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:43:21,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-14 11:43:21,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181940458] [2023-02-14 11:43:21,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:43:21,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-14 11:43:21,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:21,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-14 11:43:21,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-02-14 11:43:21,500 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:21,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:21,584 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2023-02-14 11:43:21,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 11:43:21,585 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-14 11:43:21,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:21,585 INFO L225 Difference]: With dead ends: 90 [2023-02-14 11:43:21,585 INFO L226 Difference]: Without dead ends: 78 [2023-02-14 11:43:21,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-02-14 11:43:21,586 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 69 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:21,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 184 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:43:21,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-02-14 11:43:21,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2023-02-14 11:43:21,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 65 states have internal predecessors, (82), 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) [2023-02-14 11:43:21,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2023-02-14 11:43:21,600 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 25 [2023-02-14 11:43:21,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:21,600 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2023-02-14 11:43:21,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:21,600 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2023-02-14 11:43:21,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-14 11:43:21,601 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:21,601 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:21,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-14 11:43:21,810 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,SelfDestructingSolverStorable14 [2023-02-14 11:43:21,811 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:21,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:21,811 INFO L85 PathProgramCache]: Analyzing trace with hash -120572194, now seen corresponding path program 6 times [2023-02-14 11:43:21,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:21,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093440016] [2023-02-14 11:43:21,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:21,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:21,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:21,919 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 11:43:21,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:21,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093440016] [2023-02-14 11:43:21,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093440016] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:21,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568746509] [2023-02-14 11:43:21,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 11:43:21,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:21,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:21,925 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) [2023-02-14 11:43:21,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 11:43:21,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-02-14 11:43:21,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:43:21,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 11:43:21,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:22,059 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 11:43:22,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:43:22,146 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 11:43:22,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568746509] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:43:22,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:43:22,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-02-14 11:43:22,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603107125] [2023-02-14 11:43:22,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:43:22,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 11:43:22,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:22,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 11:43:22,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-02-14 11:43:22,148 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 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) [2023-02-14 11:43:22,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:22,286 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2023-02-14 11:43:22,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 11:43:22,289 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 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 26 [2023-02-14 11:43:22,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:22,290 INFO L225 Difference]: With dead ends: 104 [2023-02-14 11:43:22,290 INFO L226 Difference]: Without dead ends: 79 [2023-02-14 11:43:22,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2023-02-14 11:43:22,291 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 128 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:22,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 103 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:43:22,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-02-14 11:43:22,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2023-02-14 11:43:22,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2424242424242424) internal successors, (82), 66 states have internal predecessors, (82), 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) [2023-02-14 11:43:22,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2023-02-14 11:43:22,306 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 26 [2023-02-14 11:43:22,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:22,306 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2023-02-14 11:43:22,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 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) [2023-02-14 11:43:22,306 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2023-02-14 11:43:22,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-14 11:43:22,307 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:22,307 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:22,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-14 11:43:22,513 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,SelfDestructingSolverStorable15 [2023-02-14 11:43:22,513 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:22,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:22,514 INFO L85 PathProgramCache]: Analyzing trace with hash -2006452209, now seen corresponding path program 7 times [2023-02-14 11:43:22,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:22,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421475959] [2023-02-14 11:43:22,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:22,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:22,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:22,757 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:43:22,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:22,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421475959] [2023-02-14 11:43:22,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421475959] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:22,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310104155] [2023-02-14 11:43:22,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 11:43:22,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:22,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:22,759 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) [2023-02-14 11:43:22,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 11:43:22,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:22,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-14 11:43:22,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:23,036 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:43:23,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:43:23,186 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:43:23,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310104155] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:43:23,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:43:23,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 26 [2023-02-14 11:43:23,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364331411] [2023-02-14 11:43:23,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:43:23,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-14 11:43:23,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:23,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-14 11:43:23,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2023-02-14 11:43:23,188 INFO L87 Difference]: Start difference. First operand 67 states and 82 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 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) [2023-02-14 11:43:23,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:23,657 INFO L93 Difference]: Finished difference Result 159 states and 188 transitions. [2023-02-14 11:43:23,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-14 11:43:23,657 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-14 11:43:23,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:23,658 INFO L225 Difference]: With dead ends: 159 [2023-02-14 11:43:23,658 INFO L226 Difference]: Without dead ends: 150 [2023-02-14 11:43:23,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=1433, Unknown=0, NotChecked=0, Total=1640 [2023-02-14 11:43:23,659 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 167 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:23,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 524 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 11:43:23,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-02-14 11:43:23,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 88. [2023-02-14 11:43:23,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.2528735632183907) internal successors, (109), 87 states have internal predecessors, (109), 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) [2023-02-14 11:43:23,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2023-02-14 11:43:23,690 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 26 [2023-02-14 11:43:23,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:23,690 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2023-02-14 11:43:23,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 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) [2023-02-14 11:43:23,691 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2023-02-14 11:43:23,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-14 11:43:23,691 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:23,691 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:23,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 11:43:23,897 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,SelfDestructingSolverStorable16 [2023-02-14 11:43:23,897 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:23,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:23,897 INFO L85 PathProgramCache]: Analyzing trace with hash -216163038, now seen corresponding path program 8 times [2023-02-14 11:43:23,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:23,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562903043] [2023-02-14 11:43:23,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:23,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:23,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 11:43:24,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:24,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562903043] [2023-02-14 11:43:24,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562903043] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:24,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069377269] [2023-02-14 11:43:24,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 11:43:24,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:24,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:24,005 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) [2023-02-14 11:43:24,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 11:43:24,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:43:24,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:43:24,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 11:43:24,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:24,117 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 11:43:24,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:43:24,181 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 11:43:24,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069377269] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:43:24,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:43:24,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-02-14 11:43:24,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605455963] [2023-02-14 11:43:24,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:43:24,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 11:43:24,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:24,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 11:43:24,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-02-14 11:43:24,184 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:24,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:24,298 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2023-02-14 11:43:24,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 11:43:24,299 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-14 11:43:24,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:24,300 INFO L225 Difference]: With dead ends: 107 [2023-02-14 11:43:24,300 INFO L226 Difference]: Without dead ends: 92 [2023-02-14 11:43:24,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-02-14 11:43:24,303 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 118 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:24,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 256 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:43:24,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-02-14 11:43:24,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2023-02-14 11:43:24,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.223529411764706) internal successors, (104), 85 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:24,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2023-02-14 11:43:24,326 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 26 [2023-02-14 11:43:24,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:24,326 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2023-02-14 11:43:24,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:24,327 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2023-02-14 11:43:24,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-14 11:43:24,327 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:24,327 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:24,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-14 11:43:24,533 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,SelfDestructingSolverStorable17 [2023-02-14 11:43:24,534 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:24,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:24,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1407838889, now seen corresponding path program 9 times [2023-02-14 11:43:24,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:24,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836275926] [2023-02-14 11:43:24,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:24,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:24,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:24,679 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:24,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:24,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836275926] [2023-02-14 11:43:24,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836275926] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:24,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459717837] [2023-02-14 11:43:24,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 11:43:24,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:24,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:24,682 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) [2023-02-14 11:43:24,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 11:43:24,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 11:43:24,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:43:24,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-14 11:43:24,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:24,862 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:24,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:43:24,995 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:24,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459717837] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:43:24,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:43:24,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-02-14 11:43:24,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673270238] [2023-02-14 11:43:24,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:43:24,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-14 11:43:24,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:24,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-14 11:43:24,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2023-02-14 11:43:24,999 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 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) [2023-02-14 11:43:25,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:25,297 INFO L93 Difference]: Finished difference Result 131 states and 154 transitions. [2023-02-14 11:43:25,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 11:43:25,298 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-14 11:43:25,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:25,299 INFO L225 Difference]: With dead ends: 131 [2023-02-14 11:43:25,299 INFO L226 Difference]: Without dead ends: 107 [2023-02-14 11:43:25,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2023-02-14 11:43:25,300 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 191 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:25,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 275 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 11:43:25,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-02-14 11:43:25,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 83. [2023-02-14 11:43:25,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.2317073170731707) internal successors, (101), 82 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:25,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2023-02-14 11:43:25,333 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 27 [2023-02-14 11:43:25,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:25,334 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2023-02-14 11:43:25,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 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) [2023-02-14 11:43:25,334 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2023-02-14 11:43:25,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-14 11:43:25,334 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:25,334 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:25,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-14 11:43:25,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:25,540 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:25,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:25,541 INFO L85 PathProgramCache]: Analyzing trace with hash -325007018, now seen corresponding path program 10 times [2023-02-14 11:43:25,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:25,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19030255] [2023-02-14 11:43:25,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:25,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:25,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:25,663 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:25,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:25,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19030255] [2023-02-14 11:43:25,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19030255] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:25,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980248613] [2023-02-14 11:43:25,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 11:43:25,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:25,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:25,665 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:43:25,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-14 11:43:25,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 11:43:25,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:43:25,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-14 11:43:25,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:25,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:43:25,957 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:25,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980248613] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:43:25,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:43:25,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-02-14 11:43:25,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310796246] [2023-02-14 11:43:25,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:43:25,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-14 11:43:25,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:25,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-14 11:43:25,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2023-02-14 11:43:25,959 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 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) [2023-02-14 11:43:26,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:26,219 INFO L93 Difference]: Finished difference Result 121 states and 141 transitions. [2023-02-14 11:43:26,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 11:43:26,220 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-14 11:43:26,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:26,220 INFO L225 Difference]: With dead ends: 121 [2023-02-14 11:43:26,220 INFO L226 Difference]: Without dead ends: 109 [2023-02-14 11:43:26,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2023-02-14 11:43:26,221 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 177 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:26,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 488 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 11:43:26,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-02-14 11:43:26,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2023-02-14 11:43:26,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2261904761904763) internal successors, (103), 84 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) [2023-02-14 11:43:26,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2023-02-14 11:43:26,253 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 27 [2023-02-14 11:43:26,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:26,253 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2023-02-14 11:43:26,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 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) [2023-02-14 11:43:26,254 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2023-02-14 11:43:26,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-14 11:43:26,254 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:26,254 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:26,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-14 11:43:26,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-02-14 11:43:26,460 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:26,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:26,460 INFO L85 PathProgramCache]: Analyzing trace with hash 480362644, now seen corresponding path program 11 times [2023-02-14 11:43:26,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:26,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181534191] [2023-02-14 11:43:26,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:26,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:26,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:26,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 11:43:26,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:26,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181534191] [2023-02-14 11:43:26,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181534191] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:26,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743462949] [2023-02-14 11:43:26,514 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 11:43:26,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:26,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:26,515 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:43:26,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-14 11:43:26,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:43:26,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:43:26,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 11:43:26,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:26,600 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 11:43:26,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:43:26,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 11:43:26,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743462949] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:43:26,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:43:26,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-02-14 11:43:26,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109958606] [2023-02-14 11:43:26,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:43:26,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 11:43:26,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:26,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 11:43:26,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-02-14 11:43:26,633 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:26,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:26,685 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2023-02-14 11:43:26,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 11:43:26,686 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-14 11:43:26,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:26,686 INFO L225 Difference]: With dead ends: 110 [2023-02-14 11:43:26,686 INFO L226 Difference]: Without dead ends: 77 [2023-02-14 11:43:26,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2023-02-14 11:43:26,688 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 77 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:26,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 175 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:43:26,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-02-14 11:43:26,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2023-02-14 11:43:26,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 70 states have internal predecessors, (85), 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) [2023-02-14 11:43:26,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2023-02-14 11:43:26,711 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 27 [2023-02-14 11:43:26,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:26,712 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2023-02-14 11:43:26,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:26,712 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2023-02-14 11:43:26,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-14 11:43:26,712 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:26,712 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:26,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-14 11:43:26,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:26,920 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:26,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:26,921 INFO L85 PathProgramCache]: Analyzing trace with hash 400247189, now seen corresponding path program 12 times [2023-02-14 11:43:26,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:26,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345727240] [2023-02-14 11:43:26,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:26,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:26,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:26,995 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 11:43:26,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:26,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345727240] [2023-02-14 11:43:26,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345727240] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:26,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433893473] [2023-02-14 11:43:26,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 11:43:26,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:26,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:26,997 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:43:27,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-14 11:43:27,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-02-14 11:43:27,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:43:27,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 11:43:27,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 11:43:27,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:43:27,119 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 11:43:27,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433893473] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:43:27,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:43:27,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-02-14 11:43:27,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693701280] [2023-02-14 11:43:27,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:43:27,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 11:43:27,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:27,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 11:43:27,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-02-14 11:43:27,121 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:27,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:27,170 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2023-02-14 11:43:27,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 11:43:27,171 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-14 11:43:27,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:27,172 INFO L225 Difference]: With dead ends: 84 [2023-02-14 11:43:27,172 INFO L226 Difference]: Without dead ends: 78 [2023-02-14 11:43:27,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2023-02-14 11:43:27,174 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 30 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:27,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 109 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:43:27,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-02-14 11:43:27,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2023-02-14 11:43:27,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 71 states have internal predecessors, (86), 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) [2023-02-14 11:43:27,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2023-02-14 11:43:27,198 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 27 [2023-02-14 11:43:27,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:27,199 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2023-02-14 11:43:27,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:27,199 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2023-02-14 11:43:27,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-14 11:43:27,200 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:27,200 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:27,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-14 11:43:27,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:27,406 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:27,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:27,407 INFO L85 PathProgramCache]: Analyzing trace with hash -822645520, now seen corresponding path program 13 times [2023-02-14 11:43:27,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:27,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350269086] [2023-02-14 11:43:27,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:27,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:27,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:27,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:43:27,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:27,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350269086] [2023-02-14 11:43:27,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350269086] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:27,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5018075] [2023-02-14 11:43:27,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 11:43:27,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:27,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:27,694 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:43:27,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-14 11:43:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:27,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-14 11:43:27,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:27,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:43:27,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:43:28,149 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:43:28,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5018075] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:43:28,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:43:28,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 29 [2023-02-14 11:43:28,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308664305] [2023-02-14 11:43:28,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:43:28,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-14 11:43:28,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:28,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-14 11:43:28,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2023-02-14 11:43:28,151 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 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) [2023-02-14 11:43:28,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:28,805 INFO L93 Difference]: Finished difference Result 149 states and 168 transitions. [2023-02-14 11:43:28,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-14 11:43:28,805 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-14 11:43:28,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:28,806 INFO L225 Difference]: With dead ends: 149 [2023-02-14 11:43:28,806 INFO L226 Difference]: Without dead ends: 140 [2023-02-14 11:43:28,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=226, Invalid=1844, Unknown=0, NotChecked=0, Total=2070 [2023-02-14 11:43:28,809 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 166 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:28,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 978 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 11:43:28,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-02-14 11:43:28,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 81. [2023-02-14 11:43:28,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.2) internal successors, (96), 80 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:28,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2023-02-14 11:43:28,835 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 28 [2023-02-14 11:43:28,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:28,835 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2023-02-14 11:43:28,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 states have internal predecessors, (47), 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) [2023-02-14 11:43:28,835 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2023-02-14 11:43:28,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-14 11:43:28,836 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:28,836 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:28,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-02-14 11:43:29,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-02-14 11:43:29,041 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:29,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:29,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1124024368, now seen corresponding path program 14 times [2023-02-14 11:43:29,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:29,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064961659] [2023-02-14 11:43:29,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:29,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:29,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:29,297 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 11:43:29,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:29,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064961659] [2023-02-14 11:43:29,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064961659] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:29,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663282759] [2023-02-14 11:43:29,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 11:43:29,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:29,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:29,301 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:43:29,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-14 11:43:29,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:43:29,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:43:29,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-14 11:43:29,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:29,627 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 11:43:29,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:43:29,774 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 11:43:29,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663282759] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:43:29,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:43:29,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 27 [2023-02-14 11:43:29,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328069547] [2023-02-14 11:43:29,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:43:29,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-14 11:43:29,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:29,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-14 11:43:29,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2023-02-14 11:43:29,776 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 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) [2023-02-14 11:43:30,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:30,238 INFO L93 Difference]: Finished difference Result 118 states and 135 transitions. [2023-02-14 11:43:30,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-14 11:43:30,238 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-14 11:43:30,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:30,239 INFO L225 Difference]: With dead ends: 118 [2023-02-14 11:43:30,239 INFO L226 Difference]: Without dead ends: 112 [2023-02-14 11:43:30,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=205, Invalid=1435, Unknown=0, NotChecked=0, Total=1640 [2023-02-14 11:43:30,240 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 115 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:30,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 419 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 11:43:30,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-14 11:43:30,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 91. [2023-02-14 11:43:30,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.2) internal successors, (108), 90 states have internal predecessors, (108), 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) [2023-02-14 11:43:30,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 108 transitions. [2023-02-14 11:43:30,280 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 108 transitions. Word has length 28 [2023-02-14 11:43:30,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:30,280 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 108 transitions. [2023-02-14 11:43:30,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 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) [2023-02-14 11:43:30,281 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 108 transitions. [2023-02-14 11:43:30,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-14 11:43:30,281 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:30,281 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:30,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-14 11:43:30,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:30,486 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:30,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:30,487 INFO L85 PathProgramCache]: Analyzing trace with hash 930430102, now seen corresponding path program 15 times [2023-02-14 11:43:30,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:30,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732671276] [2023-02-14 11:43:30,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:30,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:30,637 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:30,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:30,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732671276] [2023-02-14 11:43:30,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732671276] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:30,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226545279] [2023-02-14 11:43:30,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 11:43:30,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:30,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:30,641 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:43:30,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-14 11:43:30,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 11:43:30,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:43:30,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-14 11:43:30,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:30,880 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:30,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:43:31,040 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:31,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226545279] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:43:31,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:43:31,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2023-02-14 11:43:31,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445988762] [2023-02-14 11:43:31,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:43:31,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-14 11:43:31,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:31,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-14 11:43:31,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2023-02-14 11:43:31,041 INFO L87 Difference]: Start difference. First operand 91 states and 108 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 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) [2023-02-14 11:43:31,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:31,662 INFO L93 Difference]: Finished difference Result 155 states and 178 transitions. [2023-02-14 11:43:31,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-14 11:43:31,663 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-02-14 11:43:31,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:31,663 INFO L225 Difference]: With dead ends: 155 [2023-02-14 11:43:31,663 INFO L226 Difference]: Without dead ends: 129 [2023-02-14 11:43:31,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=363, Invalid=1277, Unknown=0, NotChecked=0, Total=1640 [2023-02-14 11:43:31,665 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 434 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:31,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 479 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 11:43:31,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-02-14 11:43:31,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 94. [2023-02-14 11:43:31,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.2150537634408602) internal successors, (113), 93 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) [2023-02-14 11:43:31,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2023-02-14 11:43:31,699 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 29 [2023-02-14 11:43:31,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:31,699 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2023-02-14 11:43:31,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 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) [2023-02-14 11:43:31,700 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2023-02-14 11:43:31,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-14 11:43:31,700 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:31,700 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:31,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-14 11:43:31,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:31,905 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:31,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:31,906 INFO L85 PathProgramCache]: Analyzing trace with hash 138479735, now seen corresponding path program 16 times [2023-02-14 11:43:31,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:31,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48137089] [2023-02-14 11:43:31,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:31,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:31,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:32,084 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:32,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:32,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48137089] [2023-02-14 11:43:32,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48137089] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:32,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952695920] [2023-02-14 11:43:32,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 11:43:32,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:32,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:32,086 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:43:32,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-14 11:43:32,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 11:43:32,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:43:32,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-14 11:43:32,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:32,314 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:32,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:43:32,485 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:32,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952695920] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:43:32,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:43:32,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2023-02-14 11:43:32,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691230501] [2023-02-14 11:43:32,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:43:32,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-14 11:43:32,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:32,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-14 11:43:32,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2023-02-14 11:43:32,488 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 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) [2023-02-14 11:43:32,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:32,925 INFO L93 Difference]: Finished difference Result 144 states and 165 transitions. [2023-02-14 11:43:32,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 11:43:32,926 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-02-14 11:43:32,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:32,927 INFO L225 Difference]: With dead ends: 144 [2023-02-14 11:43:32,927 INFO L226 Difference]: Without dead ends: 131 [2023-02-14 11:43:32,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2023-02-14 11:43:32,928 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 370 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:32,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 881 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 11:43:32,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-02-14 11:43:32,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 96. [2023-02-14 11:43:32,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.2105263157894737) internal successors, (115), 95 states have internal predecessors, (115), 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) [2023-02-14 11:43:32,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 115 transitions. [2023-02-14 11:43:32,963 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 115 transitions. Word has length 29 [2023-02-14 11:43:32,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:32,963 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 115 transitions. [2023-02-14 11:43:32,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 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) [2023-02-14 11:43:32,964 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 115 transitions. [2023-02-14 11:43:32,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-14 11:43:32,964 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:32,964 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:32,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-14 11:43:33,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:33,165 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:33,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:33,166 INFO L85 PathProgramCache]: Analyzing trace with hash 2086280437, now seen corresponding path program 17 times [2023-02-14 11:43:33,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:33,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374424197] [2023-02-14 11:43:33,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:33,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:33,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:33,222 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 11:43:33,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:33,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374424197] [2023-02-14 11:43:33,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374424197] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:33,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065870406] [2023-02-14 11:43:33,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 11:43:33,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:33,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:33,225 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:43:33,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-14 11:43:33,277 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-02-14 11:43:33,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:43:33,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-14 11:43:33,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:33,325 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 11:43:33,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:43:33,360 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 11:43:33,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065870406] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:43:33,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:43:33,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2023-02-14 11:43:33,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055637193] [2023-02-14 11:43:33,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:43:33,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-14 11:43:33,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:33,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-14 11:43:33,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-02-14 11:43:33,363 INFO L87 Difference]: Start difference. First operand 96 states and 115 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:33,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:33,454 INFO L93 Difference]: Finished difference Result 139 states and 163 transitions. [2023-02-14 11:43:33,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 11:43:33,455 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-02-14 11:43:33,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:33,455 INFO L225 Difference]: With dead ends: 139 [2023-02-14 11:43:33,455 INFO L226 Difference]: Without dead ends: 126 [2023-02-14 11:43:33,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2023-02-14 11:43:33,456 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 40 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:33,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 175 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:43:33,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-02-14 11:43:33,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2023-02-14 11:43:33,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.2252252252252251) internal successors, (136), 111 states have internal predecessors, (136), 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) [2023-02-14 11:43:33,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 136 transitions. [2023-02-14 11:43:33,502 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 136 transitions. Word has length 29 [2023-02-14 11:43:33,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:33,502 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 136 transitions. [2023-02-14 11:43:33,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:33,502 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 136 transitions. [2023-02-14 11:43:33,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-14 11:43:33,502 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:33,502 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:33,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-14 11:43:33,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-14 11:43:33,703 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:33,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:33,703 INFO L85 PathProgramCache]: Analyzing trace with hash -397298668, now seen corresponding path program 18 times [2023-02-14 11:43:33,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:33,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084657930] [2023-02-14 11:43:33,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:33,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:33,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:33,777 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 11:43:33,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:33,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084657930] [2023-02-14 11:43:33,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084657930] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:33,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995599788] [2023-02-14 11:43:33,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 11:43:33,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:33,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:33,780 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:43:33,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-14 11:43:33,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-02-14 11:43:33,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:43:33,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-14 11:43:33,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:33,872 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 11:43:33,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:43:33,905 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 11:43:33,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995599788] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:43:33,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:43:33,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2023-02-14 11:43:33,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214774695] [2023-02-14 11:43:33,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:43:33,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-14 11:43:33,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:33,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-14 11:43:33,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-02-14 11:43:33,907 INFO L87 Difference]: Start difference. First operand 112 states and 136 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:34,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:34,046 INFO L93 Difference]: Finished difference Result 262 states and 317 transitions. [2023-02-14 11:43:34,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 11:43:34,047 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-02-14 11:43:34,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:34,048 INFO L225 Difference]: With dead ends: 262 [2023-02-14 11:43:34,048 INFO L226 Difference]: Without dead ends: 202 [2023-02-14 11:43:34,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2023-02-14 11:43:34,049 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 105 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:34,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 207 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:43:34,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-02-14 11:43:34,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 134. [2023-02-14 11:43:34,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.2255639097744362) internal successors, (163), 133 states have internal predecessors, (163), 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) [2023-02-14 11:43:34,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 163 transitions. [2023-02-14 11:43:34,112 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 163 transitions. Word has length 29 [2023-02-14 11:43:34,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:34,113 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 163 transitions. [2023-02-14 11:43:34,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:34,113 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 163 transitions. [2023-02-14 11:43:34,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-14 11:43:34,113 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:34,113 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:34,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-14 11:43:34,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-14 11:43:34,319 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:34,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:34,320 INFO L85 PathProgramCache]: Analyzing trace with hash 660541935, now seen corresponding path program 19 times [2023-02-14 11:43:34,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:34,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790746231] [2023-02-14 11:43:34,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:34,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:34,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:43:34,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:34,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790746231] [2023-02-14 11:43:34,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790746231] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:34,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139011881] [2023-02-14 11:43:34,661 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 11:43:34,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:34,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:34,662 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:43:34,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-14 11:43:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:34,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-14 11:43:34,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:34,983 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:43:34,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:43:35,143 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:43:35,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139011881] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:43:35,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:43:35,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 32 [2023-02-14 11:43:35,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733579078] [2023-02-14 11:43:35,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:43:35,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-14 11:43:35,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:35,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-14 11:43:35,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=914, Unknown=0, NotChecked=0, Total=992 [2023-02-14 11:43:35,145 INFO L87 Difference]: Start difference. First operand 134 states and 163 transitions. Second operand has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 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) [2023-02-14 11:43:35,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:35,920 INFO L93 Difference]: Finished difference Result 258 states and 295 transitions. [2023-02-14 11:43:35,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-14 11:43:35,920 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 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 30 [2023-02-14 11:43:35,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:35,921 INFO L225 Difference]: With dead ends: 258 [2023-02-14 11:43:35,921 INFO L226 Difference]: Without dead ends: 249 [2023-02-14 11:43:35,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=245, Invalid=2305, Unknown=0, NotChecked=0, Total=2550 [2023-02-14 11:43:35,923 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 194 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:35,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 1417 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 11:43:35,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2023-02-14 11:43:35,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 143. [2023-02-14 11:43:35,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.2183098591549295) internal successors, (173), 142 states have internal predecessors, (173), 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) [2023-02-14 11:43:35,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 173 transitions. [2023-02-14 11:43:35,984 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 173 transitions. Word has length 30 [2023-02-14 11:43:35,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:35,984 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 173 transitions. [2023-02-14 11:43:35,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 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) [2023-02-14 11:43:35,984 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 173 transitions. [2023-02-14 11:43:35,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-14 11:43:35,985 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:35,985 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:35,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-14 11:43:36,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-14 11:43:36,186 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:36,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:36,187 INFO L85 PathProgramCache]: Analyzing trace with hash 283195298, now seen corresponding path program 20 times [2023-02-14 11:43:36,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:36,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110865186] [2023-02-14 11:43:36,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:36,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:36,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 11:43:36,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:36,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110865186] [2023-02-14 11:43:36,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110865186] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:36,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049763868] [2023-02-14 11:43:36,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 11:43:36,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:36,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:36,314 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:43:36,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-14 11:43:36,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:43:36,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:43:36,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-14 11:43:36,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:36,480 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-14 11:43:36,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:43:36,601 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-14 11:43:36,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049763868] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:43:36,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:43:36,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2023-02-14 11:43:36,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631429145] [2023-02-14 11:43:36,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:43:36,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-14 11:43:36,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:36,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-14 11:43:36,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2023-02-14 11:43:36,603 INFO L87 Difference]: Start difference. First operand 143 states and 173 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:37,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:37,039 INFO L93 Difference]: Finished difference Result 217 states and 254 transitions. [2023-02-14 11:43:37,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 11:43:37,040 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-02-14 11:43:37,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:37,041 INFO L225 Difference]: With dead ends: 217 [2023-02-14 11:43:37,041 INFO L226 Difference]: Without dead ends: 181 [2023-02-14 11:43:37,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=715, Unknown=0, NotChecked=0, Total=930 [2023-02-14 11:43:37,042 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 261 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:37,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 317 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 11:43:37,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-02-14 11:43:37,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 154. [2023-02-14 11:43:37,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.196078431372549) internal successors, (183), 153 states have internal predecessors, (183), 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) [2023-02-14 11:43:37,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 183 transitions. [2023-02-14 11:43:37,120 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 183 transitions. Word has length 30 [2023-02-14 11:43:37,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:37,120 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 183 transitions. [2023-02-14 11:43:37,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:37,120 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 183 transitions. [2023-02-14 11:43:37,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-14 11:43:37,121 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:37,121 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:37,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-02-14 11:43:37,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:37,327 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:37,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:37,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1226887537, now seen corresponding path program 21 times [2023-02-14 11:43:37,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:37,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700260040] [2023-02-14 11:43:37,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:37,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:37,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:37,619 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 11:43:37,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:37,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700260040] [2023-02-14 11:43:37,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700260040] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:37,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180512538] [2023-02-14 11:43:37,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 11:43:37,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:37,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:37,621 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:43:37,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-14 11:43:37,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-14 11:43:37,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:43:37,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-14 11:43:37,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 11:43:37,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:43:38,122 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 11:43:38,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180512538] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:43:38,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:43:38,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 30 [2023-02-14 11:43:38,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451861225] [2023-02-14 11:43:38,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:43:38,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-14 11:43:38,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:38,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-14 11:43:38,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=793, Unknown=0, NotChecked=0, Total=870 [2023-02-14 11:43:38,124 INFO L87 Difference]: Start difference. First operand 154 states and 183 transitions. Second operand has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 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) [2023-02-14 11:43:38,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:38,671 INFO L93 Difference]: Finished difference Result 226 states and 258 transitions. [2023-02-14 11:43:38,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-14 11:43:38,671 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 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 30 [2023-02-14 11:43:38,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:38,672 INFO L225 Difference]: With dead ends: 226 [2023-02-14 11:43:38,672 INFO L226 Difference]: Without dead ends: 204 [2023-02-14 11:43:38,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=223, Invalid=1847, Unknown=0, NotChecked=0, Total=2070 [2023-02-14 11:43:38,673 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 132 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:38,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 778 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 11:43:38,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-02-14 11:43:38,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 153. [2023-02-14 11:43:38,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.2039473684210527) internal successors, (183), 152 states have internal predecessors, (183), 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) [2023-02-14 11:43:38,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 183 transitions. [2023-02-14 11:43:38,740 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 183 transitions. Word has length 30 [2023-02-14 11:43:38,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:38,741 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 183 transitions. [2023-02-14 11:43:38,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 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) [2023-02-14 11:43:38,741 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 183 transitions. [2023-02-14 11:43:38,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-14 11:43:38,742 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:38,742 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:38,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-02-14 11:43:38,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:38,947 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:38,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:38,948 INFO L85 PathProgramCache]: Analyzing trace with hash 628770462, now seen corresponding path program 22 times [2023-02-14 11:43:38,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:38,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883799870] [2023-02-14 11:43:38,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:38,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:39,106 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 11:43:39,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:39,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883799870] [2023-02-14 11:43:39,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883799870] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:39,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098136841] [2023-02-14 11:43:39,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 11:43:39,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:39,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:39,108 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:43:39,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-14 11:43:39,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 11:43:39,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:43:39,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-14 11:43:39,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:39,314 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-14 11:43:39,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:43:39,431 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-14 11:43:39,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098136841] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:43:39,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:43:39,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2023-02-14 11:43:39,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115173435] [2023-02-14 11:43:39,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:43:39,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-14 11:43:39,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:39,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-14 11:43:39,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2023-02-14 11:43:39,434 INFO L87 Difference]: Start difference. First operand 153 states and 183 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:39,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:39,717 INFO L93 Difference]: Finished difference Result 186 states and 214 transitions. [2023-02-14 11:43:39,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 11:43:39,717 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-02-14 11:43:39,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:39,718 INFO L225 Difference]: With dead ends: 186 [2023-02-14 11:43:39,718 INFO L226 Difference]: Without dead ends: 167 [2023-02-14 11:43:39,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2023-02-14 11:43:39,719 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 268 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:39,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 493 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 11:43:39,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-02-14 11:43:39,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 153. [2023-02-14 11:43:39,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.1776315789473684) internal successors, (179), 152 states have internal predecessors, (179), 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) [2023-02-14 11:43:39,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 179 transitions. [2023-02-14 11:43:39,798 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 179 transitions. Word has length 30 [2023-02-14 11:43:39,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:39,798 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 179 transitions. [2023-02-14 11:43:39,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:39,799 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 179 transitions. [2023-02-14 11:43:39,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-14 11:43:39,799 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:39,799 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:39,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-14 11:43:40,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-02-14 11:43:40,005 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:40,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:40,005 INFO L85 PathProgramCache]: Analyzing trace with hash -335399049, now seen corresponding path program 23 times [2023-02-14 11:43:40,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:40,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109294493] [2023-02-14 11:43:40,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:40,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:40,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:40,205 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:40,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:40,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109294493] [2023-02-14 11:43:40,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109294493] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:40,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223823491] [2023-02-14 11:43:40,205 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 11:43:40,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:40,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:40,207 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:43:40,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-14 11:43:40,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-14 11:43:40,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:43:40,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-14 11:43:40,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:40,490 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:40,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:43:40,695 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:40,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223823491] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:43:40,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:43:40,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2023-02-14 11:43:40,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572156870] [2023-02-14 11:43:40,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:43:40,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-14 11:43:40,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:40,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-14 11:43:40,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2023-02-14 11:43:40,698 INFO L87 Difference]: Start difference. First operand 153 states and 179 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 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) [2023-02-14 11:43:41,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:41,742 INFO L93 Difference]: Finished difference Result 263 states and 298 transitions. [2023-02-14 11:43:41,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-14 11:43:41,745 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 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 31 [2023-02-14 11:43:41,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:41,746 INFO L225 Difference]: With dead ends: 263 [2023-02-14 11:43:41,746 INFO L226 Difference]: Without dead ends: 233 [2023-02-14 11:43:41,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=617, Invalid=2245, Unknown=0, NotChecked=0, Total=2862 [2023-02-14 11:43:41,747 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 605 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:41,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [605 Valid, 636 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 11:43:41,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-02-14 11:43:41,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 168. [2023-02-14 11:43:41,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.1796407185628743) internal successors, (197), 167 states have internal predecessors, (197), 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) [2023-02-14 11:43:41,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 197 transitions. [2023-02-14 11:43:41,820 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 197 transitions. Word has length 31 [2023-02-14 11:43:41,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:41,821 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 197 transitions. [2023-02-14 11:43:41,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 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) [2023-02-14 11:43:41,821 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 197 transitions. [2023-02-14 11:43:41,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-14 11:43:41,822 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:41,822 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:41,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-02-14 11:43:42,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-02-14 11:43:42,027 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:42,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:42,028 INFO L85 PathProgramCache]: Analyzing trace with hash 883943350, now seen corresponding path program 24 times [2023-02-14 11:43:42,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:42,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012576396] [2023-02-14 11:43:42,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:42,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:42,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:42,220 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:42,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:42,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012576396] [2023-02-14 11:43:42,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012576396] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:42,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486872452] [2023-02-14 11:43:42,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 11:43:42,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:42,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:42,225 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:43:42,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-14 11:43:42,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-14 11:43:42,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:43:42,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-14 11:43:42,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:42,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:43:42,750 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:42,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486872452] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:43:42,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:43:42,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2023-02-14 11:43:42,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390361560] [2023-02-14 11:43:42,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:43:42,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-14 11:43:42,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:42,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-14 11:43:42,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2023-02-14 11:43:42,752 INFO L87 Difference]: Start difference. First operand 168 states and 197 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 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) [2023-02-14 11:43:43,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:43,338 INFO L93 Difference]: Finished difference Result 251 states and 283 transitions. [2023-02-14 11:43:43,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-14 11:43:43,338 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 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 31 [2023-02-14 11:43:43,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:43,339 INFO L225 Difference]: With dead ends: 251 [2023-02-14 11:43:43,339 INFO L226 Difference]: Without dead ends: 236 [2023-02-14 11:43:43,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2023-02-14 11:43:43,340 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 498 mSDsluCounter, 1082 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 1166 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:43,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 1166 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 11:43:43,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2023-02-14 11:43:43,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 171. [2023-02-14 11:43:43,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.1764705882352942) internal successors, (200), 170 states have internal predecessors, (200), 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) [2023-02-14 11:43:43,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 200 transitions. [2023-02-14 11:43:43,416 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 200 transitions. Word has length 31 [2023-02-14 11:43:43,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:43,416 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 200 transitions. [2023-02-14 11:43:43,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 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) [2023-02-14 11:43:43,417 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 200 transitions. [2023-02-14 11:43:43,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-14 11:43:43,417 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:43,417 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:43,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-14 11:43:43,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:43,623 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:43,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:43,623 INFO L85 PathProgramCache]: Analyzing trace with hash 2026567256, now seen corresponding path program 25 times [2023-02-14 11:43:43,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:43,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706558095] [2023-02-14 11:43:43,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:43,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:43,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:43,695 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-14 11:43:43,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:43,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706558095] [2023-02-14 11:43:43,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706558095] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:43,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127533662] [2023-02-14 11:43:43,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 11:43:43,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:43,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:43,701 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:43:43,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-14 11:43:43,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:43,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-14 11:43:43,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:43,796 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-14 11:43:43,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:43:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-14 11:43:43,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127533662] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:43:43,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:43:43,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-14 11:43:43,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834701] [2023-02-14 11:43:43,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:43:43,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 11:43:43,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:43,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 11:43:43,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2023-02-14 11:43:43,836 INFO L87 Difference]: Start difference. First operand 171 states and 200 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:43,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:43,964 INFO L93 Difference]: Finished difference Result 227 states and 261 transitions. [2023-02-14 11:43:43,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 11:43:43,966 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-14 11:43:43,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:43,966 INFO L225 Difference]: With dead ends: 227 [2023-02-14 11:43:43,967 INFO L226 Difference]: Without dead ends: 171 [2023-02-14 11:43:43,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2023-02-14 11:43:43,967 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 94 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:43,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 279 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:43:43,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-02-14 11:43:44,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 157. [2023-02-14 11:43:44,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.1666666666666667) internal successors, (182), 156 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:44,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 182 transitions. [2023-02-14 11:43:44,040 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 182 transitions. Word has length 31 [2023-02-14 11:43:44,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:44,040 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 182 transitions. [2023-02-14 11:43:44,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:44,041 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 182 transitions. [2023-02-14 11:43:44,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-14 11:43:44,041 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:44,041 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:44,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-14 11:43:44,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:44,242 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:44,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:44,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1679203531, now seen corresponding path program 26 times [2023-02-14 11:43:44,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:44,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882064067] [2023-02-14 11:43:44,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:44,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:44,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:44,312 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-14 11:43:44,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:44,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882064067] [2023-02-14 11:43:44,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882064067] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:44,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152229430] [2023-02-14 11:43:44,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 11:43:44,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:44,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:44,314 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:43:44,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-14 11:43:44,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:43:44,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:43:44,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-14 11:43:44,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-14 11:43:44,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:43:44,455 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-14 11:43:44,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152229430] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:43:44,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:43:44,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-14 11:43:44,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219047800] [2023-02-14 11:43:44,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:43:44,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 11:43:44,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:44,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 11:43:44,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2023-02-14 11:43:44,457 INFO L87 Difference]: Start difference. First operand 157 states and 182 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:44,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:44,606 INFO L93 Difference]: Finished difference Result 178 states and 201 transitions. [2023-02-14 11:43:44,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 11:43:44,607 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-14 11:43:44,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:44,608 INFO L225 Difference]: With dead ends: 178 [2023-02-14 11:43:44,608 INFO L226 Difference]: Without dead ends: 172 [2023-02-14 11:43:44,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2023-02-14 11:43:44,612 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 49 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:44,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 226 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:43:44,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-02-14 11:43:44,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 158. [2023-02-14 11:43:44,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.1656050955414012) internal successors, (183), 157 states have internal predecessors, (183), 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) [2023-02-14 11:43:44,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 183 transitions. [2023-02-14 11:43:44,713 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 183 transitions. Word has length 31 [2023-02-14 11:43:44,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:44,713 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 183 transitions. [2023-02-14 11:43:44,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:44,714 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 183 transitions. [2023-02-14 11:43:44,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-14 11:43:44,714 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:44,714 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:44,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-02-14 11:43:44,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:44,915 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:44,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:44,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1999889776, now seen corresponding path program 27 times [2023-02-14 11:43:44,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:44,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32145243] [2023-02-14 11:43:44,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:44,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:44,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:45,287 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:43:45,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:45,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32145243] [2023-02-14 11:43:45,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32145243] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:45,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784945490] [2023-02-14 11:43:45,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 11:43:45,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:45,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:45,290 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:43:45,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-14 11:43:45,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-14 11:43:45,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:43:45,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-14 11:43:45,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:45,631 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:43:45,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:43:45,804 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:43:45,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784945490] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:43:45,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:43:45,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 35 [2023-02-14 11:43:45,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251813082] [2023-02-14 11:43:45,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:43:45,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-14 11:43:45,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:45,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-14 11:43:45,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2023-02-14 11:43:45,805 INFO L87 Difference]: Start difference. First operand 158 states and 183 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 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) [2023-02-14 11:43:46,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:46,752 INFO L93 Difference]: Finished difference Result 305 states and 337 transitions. [2023-02-14 11:43:46,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-14 11:43:46,752 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 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) Word has length 32 [2023-02-14 11:43:46,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:46,754 INFO L225 Difference]: With dead ends: 305 [2023-02-14 11:43:46,754 INFO L226 Difference]: Without dead ends: 296 [2023-02-14 11:43:46,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=264, Invalid=2816, Unknown=0, NotChecked=0, Total=3080 [2023-02-14 11:43:46,755 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 221 mSDsluCounter, 1841 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 1924 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:46,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 1924 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 11:43:46,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2023-02-14 11:43:46,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 167. [2023-02-14 11:43:46,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.1626506024096386) internal successors, (193), 166 states have internal predecessors, (193), 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) [2023-02-14 11:43:46,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 193 transitions. [2023-02-14 11:43:46,842 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 193 transitions. Word has length 32 [2023-02-14 11:43:46,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:46,842 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 193 transitions. [2023-02-14 11:43:46,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 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) [2023-02-14 11:43:46,842 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 193 transitions. [2023-02-14 11:43:46,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-14 11:43:46,842 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:46,842 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:46,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-02-14 11:43:47,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-02-14 11:43:47,043 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:47,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:47,043 INFO L85 PathProgramCache]: Analyzing trace with hash -120192688, now seen corresponding path program 28 times [2023-02-14 11:43:47,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:47,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359118316] [2023-02-14 11:43:47,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:47,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:47,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:47,323 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 11:43:47,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:47,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359118316] [2023-02-14 11:43:47,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359118316] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:47,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056027165] [2023-02-14 11:43:47,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 11:43:47,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:47,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:47,324 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:43:47,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-14 11:43:47,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 11:43:47,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:43:47,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-14 11:43:47,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:47,714 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 11:43:47,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:43:47,892 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 11:43:47,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056027165] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:43:47,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:43:47,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 33 [2023-02-14 11:43:47,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492233583] [2023-02-14 11:43:47,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:43:47,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-14 11:43:47,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:47,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-14 11:43:47,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2023-02-14 11:43:47,896 INFO L87 Difference]: Start difference. First operand 167 states and 193 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 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) [2023-02-14 11:43:48,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:48,593 INFO L93 Difference]: Finished difference Result 223 states and 248 transitions. [2023-02-14 11:43:48,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-14 11:43:48,593 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-02-14 11:43:48,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:48,594 INFO L225 Difference]: With dead ends: 223 [2023-02-14 11:43:48,594 INFO L226 Difference]: Without dead ends: 200 [2023-02-14 11:43:48,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=241, Invalid=2309, Unknown=0, NotChecked=0, Total=2550 [2023-02-14 11:43:48,596 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 135 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:48,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 1135 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 11:43:48,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-02-14 11:43:48,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 158. [2023-02-14 11:43:48,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.1656050955414012) internal successors, (183), 157 states have internal predecessors, (183), 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) [2023-02-14 11:43:48,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 183 transitions. [2023-02-14 11:43:48,671 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 183 transitions. Word has length 32 [2023-02-14 11:43:48,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:48,671 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 183 transitions. [2023-02-14 11:43:48,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 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) [2023-02-14 11:43:48,671 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 183 transitions. [2023-02-14 11:43:48,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-14 11:43:48,672 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:48,672 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:48,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-02-14 11:43:48,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-02-14 11:43:48,878 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:48,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:48,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1085561488, now seen corresponding path program 29 times [2023-02-14 11:43:48,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:48,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857197001] [2023-02-14 11:43:48,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:48,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:48,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:49,158 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 11:43:49,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:49,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857197001] [2023-02-14 11:43:49,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857197001] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:49,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308776304] [2023-02-14 11:43:49,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 11:43:49,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:49,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:49,161 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:43:49,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-14 11:43:49,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-02-14 11:43:49,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:43:49,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-14 11:43:49,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:49,471 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 11:43:49,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:43:49,606 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 11:43:49,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308776304] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:43:49,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:43:49,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 31 [2023-02-14 11:43:49,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454372083] [2023-02-14 11:43:49,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:43:49,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-14 11:43:49,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:49,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-14 11:43:49,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=847, Unknown=0, NotChecked=0, Total=930 [2023-02-14 11:43:49,608 INFO L87 Difference]: Start difference. First operand 158 states and 183 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 31 states have internal predecessors, (50), 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) [2023-02-14 11:43:50,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:50,124 INFO L93 Difference]: Finished difference Result 198 states and 225 transitions. [2023-02-14 11:43:50,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-14 11:43:50,125 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-02-14 11:43:50,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:50,125 INFO L225 Difference]: With dead ends: 198 [2023-02-14 11:43:50,125 INFO L226 Difference]: Without dead ends: 192 [2023-02-14 11:43:50,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=235, Invalid=1927, Unknown=0, NotChecked=0, Total=2162 [2023-02-14 11:43:50,126 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 134 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:50,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 429 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 11:43:50,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-02-14 11:43:50,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 169. [2023-02-14 11:43:50,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.1666666666666667) internal successors, (196), 168 states have internal predecessors, (196), 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) [2023-02-14 11:43:50,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 196 transitions. [2023-02-14 11:43:50,224 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 196 transitions. Word has length 32 [2023-02-14 11:43:50,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:50,224 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 196 transitions. [2023-02-14 11:43:50,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 31 states have internal predecessors, (50), 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) [2023-02-14 11:43:50,224 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 196 transitions. [2023-02-14 11:43:50,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-14 11:43:50,225 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:50,225 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:50,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-02-14 11:43:50,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-02-14 11:43:50,425 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:50,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:50,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1204403466, now seen corresponding path program 30 times [2023-02-14 11:43:50,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:50,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878402866] [2023-02-14 11:43:50,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:50,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:50,612 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:50,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:50,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878402866] [2023-02-14 11:43:50,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878402866] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:50,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241309336] [2023-02-14 11:43:50,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 11:43:50,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:50,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:50,616 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:43:50,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-14 11:43:50,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-14 11:43:50,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:43:50,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-14 11:43:50,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:50,959 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:50,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:43:51,207 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:51,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241309336] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:43:51,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:43:51,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2023-02-14 11:43:51,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724402392] [2023-02-14 11:43:51,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:43:51,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-14 11:43:51,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:51,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-14 11:43:51,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1029, Unknown=0, NotChecked=0, Total=1122 [2023-02-14 11:43:51,209 INFO L87 Difference]: Start difference. First operand 169 states and 196 transitions. Second operand has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 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) [2023-02-14 11:43:52,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:52,710 INFO L93 Difference]: Finished difference Result 299 states and 335 transitions. [2023-02-14 11:43:52,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-14 11:43:52,711 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-02-14 11:43:52,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:52,712 INFO L225 Difference]: With dead ends: 299 [2023-02-14 11:43:52,712 INFO L226 Difference]: Without dead ends: 267 [2023-02-14 11:43:52,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=964, Invalid=3592, Unknown=0, NotChecked=0, Total=4556 [2023-02-14 11:43:52,714 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 982 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 982 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:52,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [982 Valid, 866 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 11:43:52,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2023-02-14 11:43:52,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 185. [2023-02-14 11:43:52,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.1684782608695652) internal successors, (215), 184 states have internal predecessors, (215), 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) [2023-02-14 11:43:52,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 215 transitions. [2023-02-14 11:43:52,846 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 215 transitions. Word has length 33 [2023-02-14 11:43:52,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:52,847 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 215 transitions. [2023-02-14 11:43:52,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 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) [2023-02-14 11:43:52,847 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 215 transitions. [2023-02-14 11:43:52,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-14 11:43:52,847 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:52,848 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:52,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-02-14 11:43:53,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-02-14 11:43:53,052 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:53,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:53,053 INFO L85 PathProgramCache]: Analyzing trace with hash -2059494761, now seen corresponding path program 31 times [2023-02-14 11:43:53,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:53,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586262135] [2023-02-14 11:43:53,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:53,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:53,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:53,279 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:53,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:53,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586262135] [2023-02-14 11:43:53,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586262135] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:53,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477130263] [2023-02-14 11:43:53,279 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 11:43:53,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:53,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:53,281 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:43:53,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-02-14 11:43:53,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:53,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-14 11:43:53,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:53,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:43:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:43:53,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477130263] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:43:53,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:43:53,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2023-02-14 11:43:53,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066447369] [2023-02-14 11:43:53,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:43:53,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-14 11:43:53,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:53,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-14 11:43:53,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1030, Unknown=0, NotChecked=0, Total=1122 [2023-02-14 11:43:53,919 INFO L87 Difference]: Start difference. First operand 185 states and 215 transitions. Second operand has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 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) [2023-02-14 11:43:54,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:54,848 INFO L93 Difference]: Finished difference Result 286 states and 319 transitions. [2023-02-14 11:43:54,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-14 11:43:54,848 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-02-14 11:43:54,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:54,849 INFO L225 Difference]: With dead ends: 286 [2023-02-14 11:43:54,849 INFO L226 Difference]: Without dead ends: 270 [2023-02-14 11:43:54,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=261, Invalid=2091, Unknown=0, NotChecked=0, Total=2352 [2023-02-14 11:43:54,852 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 751 mSDsluCounter, 1565 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 1665 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:54,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [751 Valid, 1665 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 11:43:54,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2023-02-14 11:43:54,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 188. [2023-02-14 11:43:54,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.1657754010695187) internal successors, (218), 187 states have internal predecessors, (218), 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) [2023-02-14 11:43:54,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 218 transitions. [2023-02-14 11:43:54,953 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 218 transitions. Word has length 33 [2023-02-14 11:43:54,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:54,953 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 218 transitions. [2023-02-14 11:43:54,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 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) [2023-02-14 11:43:54,953 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 218 transitions. [2023-02-14 11:43:54,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-14 11:43:54,954 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:54,954 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:54,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-02-14 11:43:55,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:55,155 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:55,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:55,155 INFO L85 PathProgramCache]: Analyzing trace with hash 893931157, now seen corresponding path program 32 times [2023-02-14 11:43:55,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:55,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348321916] [2023-02-14 11:43:55,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:55,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:55,236 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-14 11:43:55,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:55,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348321916] [2023-02-14 11:43:55,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348321916] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:55,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210999702] [2023-02-14 11:43:55,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 11:43:55,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:55,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:55,241 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:43:55,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-02-14 11:43:55,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:43:55,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:43:55,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-14 11:43:55,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:55,364 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-14 11:43:55,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:43:55,408 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-14 11:43:55,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210999702] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:43:55,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:43:55,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2023-02-14 11:43:55,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527414815] [2023-02-14 11:43:55,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:43:55,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-14 11:43:55,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:55,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-14 11:43:55,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2023-02-14 11:43:55,410 INFO L87 Difference]: Start difference. First operand 188 states and 218 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:55,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:55,639 INFO L93 Difference]: Finished difference Result 247 states and 283 transitions. [2023-02-14 11:43:55,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-14 11:43:55,639 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-02-14 11:43:55,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:55,640 INFO L225 Difference]: With dead ends: 247 [2023-02-14 11:43:55,640 INFO L226 Difference]: Without dead ends: 233 [2023-02-14 11:43:55,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2023-02-14 11:43:55,641 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 100 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:55,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 160 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:43:55,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-02-14 11:43:55,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 210. [2023-02-14 11:43:55,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.1818181818181819) internal successors, (247), 209 states have internal predecessors, (247), 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) [2023-02-14 11:43:55,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 247 transitions. [2023-02-14 11:43:55,764 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 247 transitions. Word has length 33 [2023-02-14 11:43:55,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:55,764 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 247 transitions. [2023-02-14 11:43:55,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:55,764 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 247 transitions. [2023-02-14 11:43:55,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-14 11:43:55,765 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:55,765 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:55,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-02-14 11:43:55,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-02-14 11:43:55,971 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:55,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:55,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1979153752, now seen corresponding path program 33 times [2023-02-14 11:43:55,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:55,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863370303] [2023-02-14 11:43:55,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:55,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:55,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-14 11:43:56,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:56,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863370303] [2023-02-14 11:43:56,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863370303] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:56,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331536781] [2023-02-14 11:43:56,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 11:43:56,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:56,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:56,049 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:43:56,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-02-14 11:43:56,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 11:43:56,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:43:56,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-14 11:43:56,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:56,156 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-14 11:43:56,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:43:56,200 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-14 11:43:56,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331536781] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:43:56,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:43:56,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2023-02-14 11:43:56,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399358052] [2023-02-14 11:43:56,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:43:56,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-14 11:43:56,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:56,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-14 11:43:56,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2023-02-14 11:43:56,202 INFO L87 Difference]: Start difference. First operand 210 states and 247 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:56,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:56,579 INFO L93 Difference]: Finished difference Result 443 states and 524 transitions. [2023-02-14 11:43:56,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-14 11:43:56,579 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-02-14 11:43:56,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:56,581 INFO L225 Difference]: With dead ends: 443 [2023-02-14 11:43:56,581 INFO L226 Difference]: Without dead ends: 353 [2023-02-14 11:43:56,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2023-02-14 11:43:56,587 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 224 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:56,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 276 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:43:56,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2023-02-14 11:43:56,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 248. [2023-02-14 11:43:56,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.1821862348178138) internal successors, (292), 247 states have internal predecessors, (292), 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) [2023-02-14 11:43:56,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 292 transitions. [2023-02-14 11:43:56,765 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 292 transitions. Word has length 33 [2023-02-14 11:43:56,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:56,765 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 292 transitions. [2023-02-14 11:43:56,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:43:56,765 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 292 transitions. [2023-02-14 11:43:56,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-14 11:43:56,766 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:56,766 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:56,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-02-14 11:43:56,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:56,966 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:56,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:56,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1242809295, now seen corresponding path program 34 times [2023-02-14 11:43:56,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:56,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745543846] [2023-02-14 11:43:56,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:56,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:57,388 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:43:57,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:57,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745543846] [2023-02-14 11:43:57,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745543846] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:57,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061908092] [2023-02-14 11:43:57,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 11:43:57,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:57,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:57,389 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:43:57,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-02-14 11:43:57,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 11:43:57,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:43:57,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-14 11:43:57,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:43:57,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:43:58,003 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:43:58,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061908092] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:43:58,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:43:58,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 38 [2023-02-14 11:43:58,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353610753] [2023-02-14 11:43:58,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:43:58,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-14 11:43:58,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:58,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-14 11:43:58,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1314, Unknown=0, NotChecked=0, Total=1406 [2023-02-14 11:43:58,005 INFO L87 Difference]: Start difference. First operand 248 states and 292 transitions. Second operand has 38 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 38 states have internal predecessors, (56), 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) [2023-02-14 11:43:59,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:59,189 INFO L93 Difference]: Finished difference Result 464 states and 518 transitions. [2023-02-14 11:43:59,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-14 11:43:59,190 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 38 states have internal predecessors, (56), 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 34 [2023-02-14 11:43:59,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:59,192 INFO L225 Difference]: With dead ends: 464 [2023-02-14 11:43:59,192 INFO L226 Difference]: Without dead ends: 455 [2023-02-14 11:43:59,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=283, Invalid=3377, Unknown=0, NotChecked=0, Total=3660 [2023-02-14 11:43:59,194 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 244 mSDsluCounter, 2374 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 2474 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:59,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 2474 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1186 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 11:43:59,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2023-02-14 11:43:59,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 257. [2023-02-14 11:43:59,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.1796875) internal successors, (302), 256 states have internal predecessors, (302), 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) [2023-02-14 11:43:59,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 302 transitions. [2023-02-14 11:43:59,339 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 302 transitions. Word has length 34 [2023-02-14 11:43:59,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:59,339 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 302 transitions. [2023-02-14 11:43:59,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 38 states have internal predecessors, (56), 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) [2023-02-14 11:43:59,340 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 302 transitions. [2023-02-14 11:43:59,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-14 11:43:59,340 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:59,340 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:59,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-02-14 11:43:59,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:59,543 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:59,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:59,544 INFO L85 PathProgramCache]: Analyzing trace with hash 489303023, now seen corresponding path program 35 times [2023-02-14 11:43:59,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:59,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27376572] [2023-02-14 11:43:59,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:59,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:59,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:59,857 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 11:43:59,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:59,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27376572] [2023-02-14 11:43:59,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27376572] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:59,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506694520] [2023-02-14 11:43:59,858 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 11:43:59,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:59,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:59,859 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:43:59,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-02-14 11:43:59,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-02-14 11:43:59,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:43:59,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-14 11:43:59,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:44:00,238 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 11:44:00,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:44:00,406 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 11:44:00,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506694520] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:44:00,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:44:00,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 36 [2023-02-14 11:44:00,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315702430] [2023-02-14 11:44:00,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:44:00,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-14 11:44:00,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:44:00,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-14 11:44:00,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1169, Unknown=0, NotChecked=0, Total=1260 [2023-02-14 11:44:00,408 INFO L87 Difference]: Start difference. First operand 257 states and 302 transitions. Second operand has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:44:01,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:44:01,343 INFO L93 Difference]: Finished difference Result 364 states and 408 transitions. [2023-02-14 11:44:01,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-14 11:44:01,344 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-02-14 11:44:01,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:44:01,347 INFO L225 Difference]: With dead ends: 364 [2023-02-14 11:44:01,347 INFO L226 Difference]: Without dead ends: 340 [2023-02-14 11:44:01,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=259, Invalid=2821, Unknown=0, NotChecked=0, Total=3080 [2023-02-14 11:44:01,348 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 167 mSDsluCounter, 1390 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1458 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 11:44:01,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 1458 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 11:44:01,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2023-02-14 11:44:01,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 248. [2023-02-14 11:44:01,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.1821862348178138) internal successors, (292), 247 states have internal predecessors, (292), 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) [2023-02-14 11:44:01,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 292 transitions. [2023-02-14 11:44:01,540 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 292 transitions. Word has length 34 [2023-02-14 11:44:01,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:44:01,540 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 292 transitions. [2023-02-14 11:44:01,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:44:01,540 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 292 transitions. [2023-02-14 11:44:01,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-14 11:44:01,542 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:44:01,542 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:44:01,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-02-14 11:44:01,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-02-14 11:44:01,748 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:44:01,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:44:01,748 INFO L85 PathProgramCache]: Analyzing trace with hash -2122819938, now seen corresponding path program 36 times [2023-02-14 11:44:01,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:44:01,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836601109] [2023-02-14 11:44:01,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:44:01,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:44:01,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:44:01,907 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-14 11:44:01,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:44:01,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836601109] [2023-02-14 11:44:01,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836601109] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:44:01,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865389328] [2023-02-14 11:44:01,908 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 11:44:01,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:44:01,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:44:01,909 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:44:01,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-02-14 11:44:01,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-02-14 11:44:01,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:44:01,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-14 11:44:01,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:44:02,102 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 11:44:02,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:44:02,251 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 11:44:02,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865389328] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:44:02,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:44:02,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2023-02-14 11:44:02,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397117077] [2023-02-14 11:44:02,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:44:02,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-14 11:44:02,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:44:02,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-14 11:44:02,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2023-02-14 11:44:02,253 INFO L87 Difference]: Start difference. First operand 248 states and 292 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 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) [2023-02-14 11:44:02,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:44:02,985 INFO L93 Difference]: Finished difference Result 359 states and 413 transitions. [2023-02-14 11:44:02,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-14 11:44:02,989 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 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 34 [2023-02-14 11:44:02,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:44:02,991 INFO L225 Difference]: With dead ends: 359 [2023-02-14 11:44:02,991 INFO L226 Difference]: Without dead ends: 314 [2023-02-14 11:44:02,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=405, Invalid=1401, Unknown=0, NotChecked=0, Total=1806 [2023-02-14 11:44:02,992 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 458 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:44:02,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 419 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 11:44:02,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2023-02-14 11:44:03,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 273. [2023-02-14 11:44:03,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.161764705882353) internal successors, (316), 272 states have internal predecessors, (316), 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) [2023-02-14 11:44:03,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 316 transitions. [2023-02-14 11:44:03,166 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 316 transitions. Word has length 34 [2023-02-14 11:44:03,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:44:03,167 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 316 transitions. [2023-02-14 11:44:03,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 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) [2023-02-14 11:44:03,167 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 316 transitions. [2023-02-14 11:44:03,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-14 11:44:03,168 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:44:03,168 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:44:03,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-02-14 11:44:03,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-02-14 11:44:03,374 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:44:03,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:44:03,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1302431921, now seen corresponding path program 37 times [2023-02-14 11:44:03,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:44:03,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475101721] [2023-02-14 11:44:03,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:44:03,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:44:03,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:44:03,712 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 11:44:03,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:44:03,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475101721] [2023-02-14 11:44:03,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475101721] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:44:03,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122904816] [2023-02-14 11:44:03,713 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 11:44:03,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:44:03,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:44:03,714 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:44:03,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-02-14 11:44:03,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:44:03,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-14 11:44:03,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:44:04,067 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 11:44:04,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:44:04,219 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 11:44:04,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122904816] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:44:04,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:44:04,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 34 [2023-02-14 11:44:04,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399812690] [2023-02-14 11:44:04,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:44:04,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-14 11:44:04,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:44:04,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-14 11:44:04,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1032, Unknown=0, NotChecked=0, Total=1122 [2023-02-14 11:44:04,220 INFO L87 Difference]: Start difference. First operand 273 states and 316 transitions. Second operand has 34 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 34 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) [2023-02-14 11:44:05,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:44:05,056 INFO L93 Difference]: Finished difference Result 352 states and 398 transitions. [2023-02-14 11:44:05,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-14 11:44:05,057 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 34 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) Word has length 34 [2023-02-14 11:44:05,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:44:05,058 INFO L225 Difference]: With dead ends: 352 [2023-02-14 11:44:05,058 INFO L226 Difference]: Without dead ends: 327 [2023-02-14 11:44:05,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=253, Invalid=2399, Unknown=0, NotChecked=0, Total=2652 [2023-02-14 11:44:05,058 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 149 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 11:44:05,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 888 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 11:44:05,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-02-14 11:44:05,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 271. [2023-02-14 11:44:05,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.1666666666666667) internal successors, (315), 270 states have internal predecessors, (315), 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) [2023-02-14 11:44:05,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 315 transitions. [2023-02-14 11:44:05,284 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 315 transitions. Word has length 34 [2023-02-14 11:44:05,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:44:05,284 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 315 transitions. [2023-02-14 11:44:05,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 34 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) [2023-02-14 11:44:05,285 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 315 transitions. [2023-02-14 11:44:05,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-14 11:44:05,285 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:44:05,285 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:44:05,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-02-14 11:44:05,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-02-14 11:44:05,492 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:44:05,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:44:05,492 INFO L85 PathProgramCache]: Analyzing trace with hash -266355998, now seen corresponding path program 38 times [2023-02-14 11:44:05,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:44:05,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558521782] [2023-02-14 11:44:05,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:44:05,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:44:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:44:05,645 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-14 11:44:05,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:44:05,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558521782] [2023-02-14 11:44:05,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558521782] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:44:05,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858370271] [2023-02-14 11:44:05,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 11:44:05,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:44:05,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:44:05,647 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:44:05,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-02-14 11:44:05,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:44:05,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:44:05,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-14 11:44:05,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:44:05,850 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 11:44:05,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:44:06,022 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 11:44:06,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858370271] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:44:06,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:44:06,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2023-02-14 11:44:06,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175589546] [2023-02-14 11:44:06,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:44:06,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-14 11:44:06,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:44:06,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-14 11:44:06,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2023-02-14 11:44:06,024 INFO L87 Difference]: Start difference. First operand 271 states and 315 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:44:06,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:44:06,608 INFO L93 Difference]: Finished difference Result 318 states and 359 transitions. [2023-02-14 11:44:06,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 11:44:06,608 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-02-14 11:44:06,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:44:06,609 INFO L225 Difference]: With dead ends: 318 [2023-02-14 11:44:06,609 INFO L226 Difference]: Without dead ends: 294 [2023-02-14 11:44:06,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=1015, Unknown=0, NotChecked=0, Total=1190 [2023-02-14 11:44:06,610 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 415 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 11:44:06,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 844 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 11:44:06,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2023-02-14 11:44:06,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 271. [2023-02-14 11:44:06,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.1444444444444444) internal successors, (309), 270 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) [2023-02-14 11:44:06,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 309 transitions. [2023-02-14 11:44:06,799 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 309 transitions. Word has length 34 [2023-02-14 11:44:06,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:44:06,799 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 309 transitions. [2023-02-14 11:44:06,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:44:06,799 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 309 transitions. [2023-02-14 11:44:06,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-14 11:44:06,800 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:44:06,800 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:44:06,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-02-14 11:44:07,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-02-14 11:44:07,006 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:44:07,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:44:07,007 INFO L85 PathProgramCache]: Analyzing trace with hash 535019927, now seen corresponding path program 39 times [2023-02-14 11:44:07,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:44:07,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415528176] [2023-02-14 11:44:07,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:44:07,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:44:07,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:44:07,252 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:44:07,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:44:07,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415528176] [2023-02-14 11:44:07,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415528176] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:44:07,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074517306] [2023-02-14 11:44:07,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 11:44:07,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:44:07,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:44:07,255 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:44:07,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-02-14 11:44:07,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-14 11:44:07,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:44:07,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-14 11:44:07,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:44:07,706 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:44:07,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:44:08,068 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:44:08,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074517306] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:44:08,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:44:08,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2023-02-14 11:44:08,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841006661] [2023-02-14 11:44:08,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:44:08,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-14 11:44:08,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:44:08,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-14 11:44:08,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2023-02-14 11:44:08,070 INFO L87 Difference]: Start difference. First operand 271 states and 309 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 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) [2023-02-14 11:44:10,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:44:10,192 INFO L93 Difference]: Finished difference Result 470 states and 520 transitions. [2023-02-14 11:44:10,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-14 11:44:10,192 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 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 [2023-02-14 11:44:10,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:44:10,193 INFO L225 Difference]: With dead ends: 470 [2023-02-14 11:44:10,193 INFO L226 Difference]: Without dead ends: 434 [2023-02-14 11:44:10,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1420, Invalid=5386, Unknown=0, NotChecked=0, Total=6806 [2023-02-14 11:44:10,194 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 1179 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1179 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 11:44:10,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1179 Valid, 1078 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 11:44:10,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2023-02-14 11:44:10,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 301. [2023-02-14 11:44:10,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.1433333333333333) internal successors, (343), 300 states have internal predecessors, (343), 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) [2023-02-14 11:44:10,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 343 transitions. [2023-02-14 11:44:10,386 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 343 transitions. Word has length 35 [2023-02-14 11:44:10,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:44:10,386 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 343 transitions. [2023-02-14 11:44:10,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 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) [2023-02-14 11:44:10,386 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 343 transitions. [2023-02-14 11:44:10,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-14 11:44:10,386 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:44:10,387 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:44:10,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-02-14 11:44:10,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:44:10,587 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:44:10,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:44:10,587 INFO L85 PathProgramCache]: Analyzing trace with hash -203006442, now seen corresponding path program 40 times [2023-02-14 11:44:10,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:44:10,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711528000] [2023-02-14 11:44:10,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:44:10,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:44:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:44:10,833 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:44:10,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:44:10,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711528000] [2023-02-14 11:44:10,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711528000] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:44:10,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646999699] [2023-02-14 11:44:10,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 11:44:10,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:44:10,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:44:10,835 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:44:10,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-02-14 11:44:10,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 11:44:10,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:44:10,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-14 11:44:10,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:44:11,235 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:44:11,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:44:11,617 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:44:11,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646999699] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:44:11,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:44:11,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2023-02-14 11:44:11,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090460699] [2023-02-14 11:44:11,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:44:11,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-14 11:44:11,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:44:11,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-14 11:44:11,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2023-02-14 11:44:11,619 INFO L87 Difference]: Start difference. First operand 301 states and 343 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 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) [2023-02-14 11:44:12,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:44:12,910 INFO L93 Difference]: Finished difference Result 456 states and 502 transitions. [2023-02-14 11:44:12,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-14 11:44:12,910 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 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 [2023-02-14 11:44:12,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:44:12,911 INFO L225 Difference]: With dead ends: 456 [2023-02-14 11:44:12,911 INFO L226 Difference]: Without dead ends: 438 [2023-02-14 11:44:12,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=327, Invalid=2865, Unknown=0, NotChecked=0, Total=3192 [2023-02-14 11:44:12,912 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 1041 mSDsluCounter, 2335 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1041 SdHoareTripleChecker+Valid, 2451 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 11:44:12,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1041 Valid, 2451 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 846 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 11:44:12,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2023-02-14 11:44:13,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 305. [2023-02-14 11:44:13,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.1414473684210527) internal successors, (347), 304 states have internal predecessors, (347), 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) [2023-02-14 11:44:13,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 347 transitions. [2023-02-14 11:44:13,137 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 347 transitions. Word has length 35 [2023-02-14 11:44:13,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:44:13,137 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 347 transitions. [2023-02-14 11:44:13,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 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) [2023-02-14 11:44:13,138 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 347 transitions. [2023-02-14 11:44:13,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-14 11:44:13,138 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:44:13,138 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:44:13,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-02-14 11:44:13,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-02-14 11:44:13,343 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:44:13,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:44:13,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1280821844, now seen corresponding path program 41 times [2023-02-14 11:44:13,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:44:13,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325336160] [2023-02-14 11:44:13,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:44:13,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:44:13,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:44:13,425 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-14 11:44:13,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:44:13,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325336160] [2023-02-14 11:44:13,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325336160] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:44:13,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766319422] [2023-02-14 11:44:13,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 11:44:13,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:44:13,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:44:13,429 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:44:13,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-02-14 11:44:13,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-02-14 11:44:13,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:44:13,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-14 11:44:13,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:44:13,561 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-14 11:44:13,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:44:13,616 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-14 11:44:13,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766319422] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:44:13,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:44:13,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-02-14 11:44:13,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749217967] [2023-02-14 11:44:13,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:44:13,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-14 11:44:13,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:44:13,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-14 11:44:13,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2023-02-14 11:44:13,618 INFO L87 Difference]: Start difference. First operand 305 states and 347 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:44:13,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:44:13,988 INFO L93 Difference]: Finished difference Result 394 states and 444 transitions. [2023-02-14 11:44:13,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-14 11:44:13,989 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-14 11:44:13,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:44:13,989 INFO L225 Difference]: With dead ends: 394 [2023-02-14 11:44:13,990 INFO L226 Difference]: Without dead ends: 314 [2023-02-14 11:44:13,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2023-02-14 11:44:13,990 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 102 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:44:13,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 393 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:44:13,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2023-02-14 11:44:14,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 291. [2023-02-14 11:44:14,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.1344827586206896) internal successors, (329), 290 states have internal predecessors, (329), 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) [2023-02-14 11:44:14,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 329 transitions. [2023-02-14 11:44:14,194 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 329 transitions. Word has length 35 [2023-02-14 11:44:14,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:44:14,194 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 329 transitions. [2023-02-14 11:44:14,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:44:14,194 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 329 transitions. [2023-02-14 11:44:14,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-14 11:44:14,195 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:44:14,195 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:44:14,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-02-14 11:44:14,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:44:14,400 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:44:14,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:44:14,401 INFO L85 PathProgramCache]: Analyzing trace with hash 365909845, now seen corresponding path program 42 times [2023-02-14 11:44:14,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:44:14,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547818904] [2023-02-14 11:44:14,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:44:14,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:44:14,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:44:14,486 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-14 11:44:14,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:44:14,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547818904] [2023-02-14 11:44:14,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547818904] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:44:14,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837530698] [2023-02-14 11:44:14,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 11:44:14,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:44:14,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:44:14,488 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:44:14,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-02-14 11:44:14,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-02-14 11:44:14,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:44:14,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-14 11:44:14,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:44:14,583 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-14 11:44:14,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:44:14,629 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-14 11:44:14,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837530698] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:44:14,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:44:14,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-02-14 11:44:14,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750291462] [2023-02-14 11:44:14,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:44:14,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-14 11:44:14,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:44:14,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-14 11:44:14,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2023-02-14 11:44:14,631 INFO L87 Difference]: Start difference. First operand 291 states and 329 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:44:14,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:44:14,917 INFO L93 Difference]: Finished difference Result 321 states and 356 transitions. [2023-02-14 11:44:14,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-14 11:44:14,918 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-14 11:44:14,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:44:14,918 INFO L225 Difference]: With dead ends: 321 [2023-02-14 11:44:14,919 INFO L226 Difference]: Without dead ends: 315 [2023-02-14 11:44:14,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2023-02-14 11:44:14,919 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 49 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:44:14,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 183 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:44:14,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2023-02-14 11:44:15,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 292. [2023-02-14 11:44:15,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.134020618556701) internal successors, (330), 291 states have internal predecessors, (330), 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) [2023-02-14 11:44:15,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 330 transitions. [2023-02-14 11:44:15,123 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 330 transitions. Word has length 35 [2023-02-14 11:44:15,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:44:15,123 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 330 transitions. [2023-02-14 11:44:15,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:44:15,123 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 330 transitions. [2023-02-14 11:44:15,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-14 11:44:15,123 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:44:15,123 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:44:15,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-02-14 11:44:15,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-02-14 11:44:15,325 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:44:15,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:44:15,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1335594960, now seen corresponding path program 43 times [2023-02-14 11:44:15,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:44:15,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146746170] [2023-02-14 11:44:15,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:44:15,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:44:15,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:44:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:44:15,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:44:15,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146746170] [2023-02-14 11:44:15,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146746170] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:44:15,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788872136] [2023-02-14 11:44:15,722 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 11:44:15,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:44:15,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:44:15,723 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:44:15,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-02-14 11:44:15,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:44:15,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 54 conjunts are in the unsatisfiable core [2023-02-14 11:44:15,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:44:16,197 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:44:16,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:44:16,404 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:44:16,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788872136] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:44:16,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:44:16,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 41 [2023-02-14 11:44:16,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682391536] [2023-02-14 11:44:16,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:44:16,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-14 11:44:16,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:44:16,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-14 11:44:16,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1541, Unknown=0, NotChecked=0, Total=1640 [2023-02-14 11:44:16,406 INFO L87 Difference]: Start difference. First operand 292 states and 330 transitions. Second operand has 41 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 41 states have internal predecessors, (59), 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) [2023-02-14 11:44:17,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:44:17,881 INFO L93 Difference]: Finished difference Result 540 states and 587 transitions. [2023-02-14 11:44:17,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-14 11:44:17,881 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 41 states have internal predecessors, (59), 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 36 [2023-02-14 11:44:17,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:44:17,882 INFO L225 Difference]: With dead ends: 540 [2023-02-14 11:44:17,882 INFO L226 Difference]: Without dead ends: 531 [2023-02-14 11:44:17,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=302, Invalid=3988, Unknown=0, NotChecked=0, Total=4290 [2023-02-14 11:44:17,883 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 265 mSDsluCounter, 3035 mSDsCounter, 0 mSdLazyCounter, 1489 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 3152 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 11:44:17,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 3152 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1489 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 11:44:17,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2023-02-14 11:44:18,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 301. [2023-02-14 11:44:18,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.1333333333333333) internal successors, (340), 300 states have internal predecessors, (340), 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) [2023-02-14 11:44:18,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 340 transitions. [2023-02-14 11:44:18,120 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 340 transitions. Word has length 36 [2023-02-14 11:44:18,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:44:18,120 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 340 transitions. [2023-02-14 11:44:18,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 41 states have internal predecessors, (59), 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) [2023-02-14 11:44:18,120 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 340 transitions. [2023-02-14 11:44:18,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-14 11:44:18,121 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:44:18,121 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:44:18,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-02-14 11:44:18,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:44:18,326 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:44:18,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:44:18,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1858622864, now seen corresponding path program 44 times [2023-02-14 11:44:18,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:44:18,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711929223] [2023-02-14 11:44:18,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:44:18,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:44:18,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:44:18,676 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 11:44:18,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:44:18,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711929223] [2023-02-14 11:44:18,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711929223] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:44:18,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365050407] [2023-02-14 11:44:18,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 11:44:18,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:44:18,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:44:18,678 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:44:18,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-02-14 11:44:18,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:44:18,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:44:18,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-14 11:44:18,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:44:19,087 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 11:44:19,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:44:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 11:44:19,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365050407] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:44:19,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:44:19,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 39 [2023-02-14 11:44:19,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146436899] [2023-02-14 11:44:19,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:44:19,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-14 11:44:19,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:44:19,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-14 11:44:19,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1384, Unknown=0, NotChecked=0, Total=1482 [2023-02-14 11:44:19,271 INFO L87 Difference]: Start difference. First operand 301 states and 340 transitions. Second operand has 39 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 39 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:44:20,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:44:20,396 INFO L93 Difference]: Finished difference Result 427 states and 465 transitions. [2023-02-14 11:44:20,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-14 11:44:20,397 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 39 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-02-14 11:44:20,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:44:20,398 INFO L225 Difference]: With dead ends: 427 [2023-02-14 11:44:20,398 INFO L226 Difference]: Without dead ends: 402 [2023-02-14 11:44:20,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=277, Invalid=3383, Unknown=0, NotChecked=0, Total=3660 [2023-02-14 11:44:20,399 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 188 mSDsluCounter, 1884 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 1973 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 11:44:20,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 1973 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 11:44:20,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2023-02-14 11:44:20,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 292. [2023-02-14 11:44:20,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.134020618556701) internal successors, (330), 291 states have internal predecessors, (330), 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) [2023-02-14 11:44:20,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 330 transitions. [2023-02-14 11:44:20,634 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 330 transitions. Word has length 36 [2023-02-14 11:44:20,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:44:20,634 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 330 transitions. [2023-02-14 11:44:20,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 39 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:44:20,634 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 330 transitions. [2023-02-14 11:44:20,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-14 11:44:20,635 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:44:20,635 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:44:20,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-02-14 11:44:20,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:44:20,837 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:44:20,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:44:20,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1659359184, now seen corresponding path program 45 times [2023-02-14 11:44:20,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:44:20,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541401305] [2023-02-14 11:44:20,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:44:20,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:44:20,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:44:21,194 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 11:44:21,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:44:21,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541401305] [2023-02-14 11:44:21,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541401305] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:44:21,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963191145] [2023-02-14 11:44:21,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 11:44:21,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:44:21,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:44:21,197 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:44:21,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-02-14 11:44:21,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 11:44:21,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:44:21,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-14 11:44:21,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:44:21,669 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 11:44:21,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:44:21,842 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 11:44:21,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963191145] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:44:21,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:44:21,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 37 [2023-02-14 11:44:21,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150078028] [2023-02-14 11:44:21,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:44:21,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-14 11:44:21,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:44:21,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-14 11:44:21,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1235, Unknown=0, NotChecked=0, Total=1332 [2023-02-14 11:44:21,843 INFO L87 Difference]: Start difference. First operand 292 states and 330 transitions. Second operand has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 37 states have internal predecessors, (56), 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) [2023-02-14 11:44:22,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:44:22,761 INFO L93 Difference]: Finished difference Result 352 states and 389 transitions. [2023-02-14 11:44:22,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-14 11:44:22,762 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 37 states have internal predecessors, (56), 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 36 [2023-02-14 11:44:22,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:44:22,763 INFO L225 Difference]: With dead ends: 352 [2023-02-14 11:44:22,763 INFO L226 Difference]: Without dead ends: 326 [2023-02-14 11:44:22,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=271, Invalid=2921, Unknown=0, NotChecked=0, Total=3192 [2023-02-14 11:44:22,763 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 138 mSDsluCounter, 1203 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 11:44:22,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 1258 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 11:44:22,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2023-02-14 11:44:22,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 281. [2023-02-14 11:44:22,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.1357142857142857) internal successors, (318), 280 states have internal predecessors, (318), 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) [2023-02-14 11:44:22,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 318 transitions. [2023-02-14 11:44:22,952 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 318 transitions. Word has length 36 [2023-02-14 11:44:22,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:44:22,953 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 318 transitions. [2023-02-14 11:44:22,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 37 states have internal predecessors, (56), 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) [2023-02-14 11:44:22,953 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 318 transitions. [2023-02-14 11:44:22,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-14 11:44:22,953 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:44:22,953 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:44:22,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-02-14 11:44:23,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-02-14 11:44:23,154 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:44:23,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:44:23,154 INFO L85 PathProgramCache]: Analyzing trace with hash 59566704, now seen corresponding path program 46 times [2023-02-14 11:44:23,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:44:23,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121052552] [2023-02-14 11:44:23,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:44:23,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:44:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:44:23,456 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-14 11:44:23,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:44:23,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121052552] [2023-02-14 11:44:23,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121052552] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:44:23,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298549310] [2023-02-14 11:44:23,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 11:44:23,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:44:23,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:44:23,458 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:44:23,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-02-14 11:44:23,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 11:44:23,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:44:23,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-14 11:44:23,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:44:23,879 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-14 11:44:23,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:44:24,033 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-14 11:44:24,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298549310] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:44:24,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:44:24,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 36 [2023-02-14 11:44:24,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604764398] [2023-02-14 11:44:24,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:44:24,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-14 11:44:24,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:44:24,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-14 11:44:24,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2023-02-14 11:44:24,035 INFO L87 Difference]: Start difference. First operand 281 states and 318 transitions. Second operand has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:44:24,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:44:24,796 INFO L93 Difference]: Finished difference Result 324 states and 363 transitions. [2023-02-14 11:44:24,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-14 11:44:24,796 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-02-14 11:44:24,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:44:24,797 INFO L225 Difference]: With dead ends: 324 [2023-02-14 11:44:24,797 INFO L226 Difference]: Without dead ends: 318 [2023-02-14 11:44:24,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=271, Invalid=2591, Unknown=0, NotChecked=0, Total=2862 [2023-02-14 11:44:24,798 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 131 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 11:44:24,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 535 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 11:44:24,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2023-02-14 11:44:24,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 293. [2023-02-14 11:44:24,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.1369863013698631) internal successors, (332), 292 states have internal predecessors, (332), 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) [2023-02-14 11:44:24,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 332 transitions. [2023-02-14 11:44:24,999 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 332 transitions. Word has length 36 [2023-02-14 11:44:24,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:44:24,999 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 332 transitions. [2023-02-14 11:44:24,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:44:25,000 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 332 transitions. [2023-02-14 11:44:25,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-14 11:44:25,000 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:44:25,000 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:44:25,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-02-14 11:44:25,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-02-14 11:44:25,205 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:44:25,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:44:25,205 INFO L85 PathProgramCache]: Analyzing trace with hash -2086100650, now seen corresponding path program 47 times [2023-02-14 11:44:25,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:44:25,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556491727] [2023-02-14 11:44:25,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:44:25,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:44:25,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:44:25,454 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:44:25,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:44:25,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556491727] [2023-02-14 11:44:25,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556491727] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:44:25,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769536250] [2023-02-14 11:44:25,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 11:44:25,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:44:25,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:44:25,456 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:44:25,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-02-14 11:44:25,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-14 11:44:25,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:44:25,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-14 11:44:25,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:44:25,921 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:44:25,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:44:26,348 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:44:26,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769536250] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:44:26,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:44:26,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 44 [2023-02-14 11:44:26,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754453632] [2023-02-14 11:44:26,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:44:26,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-14 11:44:26,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:44:26,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-14 11:44:26,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1771, Unknown=0, NotChecked=0, Total=1892 [2023-02-14 11:44:26,349 INFO L87 Difference]: Start difference. First operand 293 states and 332 transitions. Second operand has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 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) [2023-02-14 11:44:29,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:44:29,207 INFO L93 Difference]: Finished difference Result 520 states and 571 transitions. [2023-02-14 11:44:29,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-14 11:44:29,208 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 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 37 [2023-02-14 11:44:29,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:44:29,209 INFO L225 Difference]: With dead ends: 520 [2023-02-14 11:44:29,209 INFO L226 Difference]: Without dead ends: 482 [2023-02-14 11:44:29,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 41 SyntacticMatches, 8 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2002, Invalid=7700, Unknown=0, NotChecked=0, Total=9702 [2023-02-14 11:44:29,211 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 1563 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1563 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 11:44:29,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1563 Valid, 1314 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 11:44:29,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2023-02-14 11:44:29,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 324. [2023-02-14 11:44:29,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 1.1362229102167183) internal successors, (367), 323 states have internal predecessors, (367), 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) [2023-02-14 11:44:29,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 367 transitions. [2023-02-14 11:44:29,456 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 367 transitions. Word has length 37 [2023-02-14 11:44:29,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:44:29,456 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 367 transitions. [2023-02-14 11:44:29,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 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) [2023-02-14 11:44:29,456 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 367 transitions. [2023-02-14 11:44:29,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-14 11:44:29,457 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:44:29,457 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:44:29,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-02-14 11:44:29,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-02-14 11:44:29,657 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:44:29,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:44:29,658 INFO L85 PathProgramCache]: Analyzing trace with hash 804885687, now seen corresponding path program 48 times [2023-02-14 11:44:29,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:44:29,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581395595] [2023-02-14 11:44:29,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:44:29,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:44:29,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:44:29,898 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:44:29,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:44:29,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581395595] [2023-02-14 11:44:29,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581395595] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:44:29,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168155901] [2023-02-14 11:44:29,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 11:44:29,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:44:29,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:44:29,899 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:44:29,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-02-14 11:44:29,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-14 11:44:29,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:44:29,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-14 11:44:29,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:44:30,368 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:44:30,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:44:30,778 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:44:30,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168155901] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:44:30,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:44:30,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 44 [2023-02-14 11:44:30,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91878415] [2023-02-14 11:44:30,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:44:30,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-14 11:44:30,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:44:30,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-14 11:44:30,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1772, Unknown=0, NotChecked=0, Total=1892 [2023-02-14 11:44:30,784 INFO L87 Difference]: Start difference. First operand 324 states and 367 transitions. Second operand has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 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) [2023-02-14 11:44:32,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:44:32,548 INFO L93 Difference]: Finished difference Result 505 states and 552 transitions. [2023-02-14 11:44:32,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-14 11:44:32,549 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 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 37 [2023-02-14 11:44:32,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:44:32,550 INFO L225 Difference]: With dead ends: 505 [2023-02-14 11:44:32,550 INFO L226 Difference]: Without dead ends: 486 [2023-02-14 11:44:32,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 41 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=399, Invalid=3761, Unknown=0, NotChecked=0, Total=4160 [2023-02-14 11:44:32,551 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 1170 mSDsluCounter, 3353 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1170 SdHoareTripleChecker+Valid, 3485 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 11:44:32,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1170 Valid, 3485 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1261 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 11:44:32,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2023-02-14 11:44:32,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 328. [2023-02-14 11:44:32,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.1345565749235473) internal successors, (371), 327 states have internal predecessors, (371), 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) [2023-02-14 11:44:32,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 371 transitions. [2023-02-14 11:44:32,816 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 371 transitions. Word has length 37 [2023-02-14 11:44:32,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:44:32,816 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 371 transitions. [2023-02-14 11:44:32,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 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) [2023-02-14 11:44:32,817 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 371 transitions. [2023-02-14 11:44:32,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-14 11:44:32,818 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:44:32,818 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:44:32,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-02-14 11:44:33,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-02-14 11:44:33,024 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:44:33,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:44:33,024 INFO L85 PathProgramCache]: Analyzing trace with hash -847136075, now seen corresponding path program 49 times [2023-02-14 11:44:33,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:44:33,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704209413] [2023-02-14 11:44:33,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:44:33,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:44:33,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:44:33,100 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-14 11:44:33,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:44:33,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704209413] [2023-02-14 11:44:33,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704209413] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:44:33,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589555920] [2023-02-14 11:44:33,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 11:44:33,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:44:33,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:44:33,102 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:44:33,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-02-14 11:44:33,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:44:33,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-14 11:44:33,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:44:33,211 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-14 11:44:33,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:44:33,271 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-14 11:44:33,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589555920] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:44:33,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:44:33,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 19 [2023-02-14 11:44:33,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690615777] [2023-02-14 11:44:33,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:44:33,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-14 11:44:33,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:44:33,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-14 11:44:33,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2023-02-14 11:44:33,273 INFO L87 Difference]: Start difference. First operand 328 states and 371 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2023-02-14 11:44:33,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:44:33,765 INFO L93 Difference]: Finished difference Result 404 states and 454 transitions. [2023-02-14 11:44:33,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-14 11:44:33,766 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) Word has length 37 [2023-02-14 11:44:33,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:44:33,767 INFO L225 Difference]: With dead ends: 404 [2023-02-14 11:44:33,767 INFO L226 Difference]: Without dead ends: 389 [2023-02-14 11:44:33,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=551, Unknown=0, NotChecked=0, Total=756 [2023-02-14 11:44:33,768 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 118 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:44:33,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 302 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:44:33,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2023-02-14 11:44:34,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 356. [2023-02-14 11:44:34,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.1492957746478873) internal successors, (408), 355 states have internal predecessors, (408), 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) [2023-02-14 11:44:34,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 408 transitions. [2023-02-14 11:44:34,068 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 408 transitions. Word has length 37 [2023-02-14 11:44:34,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:44:34,069 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 408 transitions. [2023-02-14 11:44:34,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2023-02-14 11:44:34,069 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 408 transitions. [2023-02-14 11:44:34,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-14 11:44:34,069 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:44:34,069 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:44:34,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-02-14 11:44:34,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-02-14 11:44:34,270 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:44:34,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:44:34,270 INFO L85 PathProgramCache]: Analyzing trace with hash 855363028, now seen corresponding path program 50 times [2023-02-14 11:44:34,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:44:34,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755160068] [2023-02-14 11:44:34,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:44:34,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:44:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:44:34,354 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-14 11:44:34,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:44:34,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755160068] [2023-02-14 11:44:34,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755160068] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:44:34,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648214443] [2023-02-14 11:44:34,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 11:44:34,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:44:34,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:44:34,357 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:44:34,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-02-14 11:44:34,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:44:34,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:44:34,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-14 11:44:34,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:44:34,495 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-14 11:44:34,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:44:34,557 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-14 11:44:34,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648214443] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:44:34,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:44:34,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 19 [2023-02-14 11:44:34,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119473496] [2023-02-14 11:44:34,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:44:34,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-14 11:44:34,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:44:34,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-14 11:44:34,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2023-02-14 11:44:34,559 INFO L87 Difference]: Start difference. First operand 356 states and 408 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2023-02-14 11:44:35,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:44:35,240 INFO L93 Difference]: Finished difference Result 685 states and 794 transitions. [2023-02-14 11:44:35,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-14 11:44:35,244 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) Word has length 37 [2023-02-14 11:44:35,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:44:35,245 INFO L225 Difference]: With dead ends: 685 [2023-02-14 11:44:35,245 INFO L226 Difference]: Without dead ends: 561 [2023-02-14 11:44:35,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=551, Unknown=0, NotChecked=0, Total=756 [2023-02-14 11:44:35,245 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 375 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:44:35,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 347 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:44:35,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2023-02-14 11:44:35,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 414. [2023-02-14 11:44:35,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.1501210653753027) internal successors, (475), 413 states have internal predecessors, (475), 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) [2023-02-14 11:44:35,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 475 transitions. [2023-02-14 11:44:35,590 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 475 transitions. Word has length 37 [2023-02-14 11:44:35,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:44:35,590 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 475 transitions. [2023-02-14 11:44:35,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2023-02-14 11:44:35,590 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 475 transitions. [2023-02-14 11:44:35,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-14 11:44:35,591 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:44:35,591 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:44:35,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-02-14 11:44:35,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-02-14 11:44:35,797 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:44:35,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:44:35,797 INFO L85 PathProgramCache]: Analyzing trace with hash -155710033, now seen corresponding path program 51 times [2023-02-14 11:44:35,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:44:35,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908911613] [2023-02-14 11:44:35,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:44:35,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:44:35,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:44:36,252 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:44:36,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:44:36,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908911613] [2023-02-14 11:44:36,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908911613] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:44:36,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323701224] [2023-02-14 11:44:36,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 11:44:36,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:44:36,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:44:36,253 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:44:36,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-02-14 11:44:36,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-14 11:44:36,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:44:36,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-14 11:44:36,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:44:36,725 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:44:36,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:44:36,912 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:44:36,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323701224] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:44:36,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:44:36,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 44 [2023-02-14 11:44:36,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034502278] [2023-02-14 11:44:36,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:44:36,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-14 11:44:36,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:44:36,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-14 11:44:36,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1786, Unknown=0, NotChecked=0, Total=1892 [2023-02-14 11:44:36,914 INFO L87 Difference]: Start difference. First operand 414 states and 475 transitions. Second operand has 44 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 44 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:44:38,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:44:38,978 INFO L93 Difference]: Finished difference Result 761 states and 834 transitions. [2023-02-14 11:44:38,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-14 11:44:38,978 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 44 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-02-14 11:44:38,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:44:38,980 INFO L225 Difference]: With dead ends: 761 [2023-02-14 11:44:38,980 INFO L226 Difference]: Without dead ends: 752 [2023-02-14 11:44:38,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=321, Invalid=4649, Unknown=0, NotChecked=0, Total=4970 [2023-02-14 11:44:38,981 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 294 mSDsluCounter, 3963 mSDsCounter, 0 mSdLazyCounter, 1881 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 4097 SdHoareTripleChecker+Invalid, 1882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-14 11:44:38,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 4097 Invalid, 1882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1881 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-14 11:44:38,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2023-02-14 11:44:39,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 423. [2023-02-14 11:44:39,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 1.1492890995260663) internal successors, (485), 422 states have internal predecessors, (485), 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) [2023-02-14 11:44:39,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 485 transitions. [2023-02-14 11:44:39,327 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 485 transitions. Word has length 38 [2023-02-14 11:44:39,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:44:39,327 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 485 transitions. [2023-02-14 11:44:39,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 44 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:44:39,327 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 485 transitions. [2023-02-14 11:44:39,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-14 11:44:39,328 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:44:39,328 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:44:39,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-02-14 11:44:39,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:44:39,529 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:44:39,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:44:39,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1493827249, now seen corresponding path program 52 times [2023-02-14 11:44:39,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:44:39,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514361415] [2023-02-14 11:44:39,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:44:39,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:44:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:44:39,977 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 11:44:39,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:44:39,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514361415] [2023-02-14 11:44:39,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514361415] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:44:39,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500598194] [2023-02-14 11:44:39,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 11:44:39,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:44:39,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:44:39,979 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:44:39,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-02-14 11:44:40,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 11:44:40,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:44:40,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 54 conjunts are in the unsatisfiable core [2023-02-14 11:44:40,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:44:40,445 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 11:44:40,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:44:40,646 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 11:44:40,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500598194] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:44:40,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:44:40,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 42 [2023-02-14 11:44:40,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863798924] [2023-02-14 11:44:40,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:44:40,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-14 11:44:40,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:44:40,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-14 11:44:40,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1617, Unknown=0, NotChecked=0, Total=1722 [2023-02-14 11:44:40,647 INFO L87 Difference]: Start difference. First operand 423 states and 485 transitions. Second operand has 42 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:44:42,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:44:42,414 INFO L93 Difference]: Finished difference Result 623 states and 684 transitions. [2023-02-14 11:44:42,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-14 11:44:42,415 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-02-14 11:44:42,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:44:42,417 INFO L225 Difference]: With dead ends: 623 [2023-02-14 11:44:42,417 INFO L226 Difference]: Without dead ends: 597 [2023-02-14 11:44:42,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=295, Invalid=3995, Unknown=0, NotChecked=0, Total=4290 [2023-02-14 11:44:42,417 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 214 mSDsluCounter, 2794 mSDsCounter, 0 mSdLazyCounter, 1458 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 2896 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 11:44:42,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 2896 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1458 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 11:44:42,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2023-02-14 11:44:42,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 414. [2023-02-14 11:44:42,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.1501210653753027) internal successors, (475), 413 states have internal predecessors, (475), 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) [2023-02-14 11:44:42,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 475 transitions. [2023-02-14 11:44:42,747 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 475 transitions. Word has length 38 [2023-02-14 11:44:42,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:44:42,748 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 475 transitions. [2023-02-14 11:44:42,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:44:42,748 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 475 transitions. [2023-02-14 11:44:42,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-14 11:44:42,748 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:44:42,748 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:44:42,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-02-14 11:44:42,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:44:42,949 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:44:42,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:44:42,949 INFO L85 PathProgramCache]: Analyzing trace with hash -375561937, now seen corresponding path program 53 times [2023-02-14 11:44:42,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:44:42,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641655682] [2023-02-14 11:44:42,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:44:42,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:44:42,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:44:43,335 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 11:44:43,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:44:43,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641655682] [2023-02-14 11:44:43,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641655682] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:44:43,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830192962] [2023-02-14 11:44:43,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 11:44:43,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:44:43,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:44:43,337 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:44:43,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-02-14 11:44:43,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-02-14 11:44:43,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:44:43,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-14 11:44:43,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:44:43,814 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 11:44:43,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:44:43,995 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 11:44:43,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830192962] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:44:43,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:44:43,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 40 [2023-02-14 11:44:43,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724420936] [2023-02-14 11:44:43,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:44:43,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-14 11:44:43,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:44:43,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-14 11:44:43,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1456, Unknown=0, NotChecked=0, Total=1560 [2023-02-14 11:44:43,997 INFO L87 Difference]: Start difference. First operand 414 states and 475 transitions. Second operand has 40 states, 40 states have (on average 1.475) internal successors, (59), 40 states have internal predecessors, (59), 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) [2023-02-14 11:44:45,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:44:45,309 INFO L93 Difference]: Finished difference Result 530 states and 590 transitions. [2023-02-14 11:44:45,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-14 11:44:45,309 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.475) internal successors, (59), 40 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-02-14 11:44:45,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:44:45,311 INFO L225 Difference]: With dead ends: 530 [2023-02-14 11:44:45,311 INFO L226 Difference]: Without dead ends: 503 [2023-02-14 11:44:45,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=289, Invalid=3493, Unknown=0, NotChecked=0, Total=3782 [2023-02-14 11:44:45,311 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 172 mSDsluCounter, 1564 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 1632 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 11:44:45,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 1632 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 11:44:45,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2023-02-14 11:44:45,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 403. [2023-02-14 11:44:45,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.1517412935323383) internal successors, (463), 402 states have internal predecessors, (463), 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) [2023-02-14 11:44:45,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 463 transitions. [2023-02-14 11:44:45,653 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 463 transitions. Word has length 38 [2023-02-14 11:44:45,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:44:45,653 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 463 transitions. [2023-02-14 11:44:45,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.475) internal successors, (59), 40 states have internal predecessors, (59), 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) [2023-02-14 11:44:45,653 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 463 transitions. [2023-02-14 11:44:45,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-14 11:44:45,654 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:44:45,654 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:44:45,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-02-14 11:44:45,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:44:45,859 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:44:45,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:44:45,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1552999778, now seen corresponding path program 54 times [2023-02-14 11:44:45,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:44:45,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945841248] [2023-02-14 11:44:45,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:44:45,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:44:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:44:46,043 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-14 11:44:46,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:44:46,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945841248] [2023-02-14 11:44:46,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945841248] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:44:46,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634497434] [2023-02-14 11:44:46,044 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 11:44:46,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:44:46,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:44:46,045 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:44:46,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-02-14 11:44:46,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-14 11:44:46,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:44:46,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-14 11:44:46,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:44:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-14 11:44:46,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:44:46,478 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-14 11:44:46,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634497434] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:44:46,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:44:46,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2023-02-14 11:44:46,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455663860] [2023-02-14 11:44:46,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:44:46,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-14 11:44:46,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:44:46,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-14 11:44:46,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2023-02-14 11:44:46,480 INFO L87 Difference]: Start difference. First operand 403 states and 463 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 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) [2023-02-14 11:44:47,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:44:47,787 INFO L93 Difference]: Finished difference Result 556 states and 629 transitions. [2023-02-14 11:44:47,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-14 11:44:47,791 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-02-14 11:44:47,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:44:47,792 INFO L225 Difference]: With dead ends: 556 [2023-02-14 11:44:47,792 INFO L226 Difference]: Without dead ends: 502 [2023-02-14 11:44:47,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=675, Invalid=2405, Unknown=0, NotChecked=0, Total=3080 [2023-02-14 11:44:47,793 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 745 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:44:47,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [745 Valid, 685 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 11:44:47,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2023-02-14 11:44:48,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 446. [2023-02-14 11:44:48,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.1348314606741574) internal successors, (505), 445 states have internal predecessors, (505), 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) [2023-02-14 11:44:48,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 505 transitions. [2023-02-14 11:44:48,146 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 505 transitions. Word has length 38 [2023-02-14 11:44:48,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:44:48,146 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 505 transitions. [2023-02-14 11:44:48,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 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) [2023-02-14 11:44:48,146 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 505 transitions. [2023-02-14 11:44:48,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-14 11:44:48,147 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:44:48,147 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:44:48,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2023-02-14 11:44:48,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:44:48,348 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:44:48,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:44:48,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1465831985, now seen corresponding path program 55 times [2023-02-14 11:44:48,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:44:48,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190424330] [2023-02-14 11:44:48,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:44:48,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:44:48,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:44:48,713 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-14 11:44:48,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:44:48,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190424330] [2023-02-14 11:44:48,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190424330] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:44:48,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046768414] [2023-02-14 11:44:48,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 11:44:48,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:44:48,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:44:48,715 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:44:48,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-02-14 11:44:48,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:44:48,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-14 11:44:48,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:44:49,206 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-14 11:44:49,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:44:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-14 11:44:49,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046768414] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:44:49,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:44:49,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 38 [2023-02-14 11:44:49,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990441372] [2023-02-14 11:44:49,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:44:49,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-14 11:44:49,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:44:49,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-14 11:44:49,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2023-02-14 11:44:49,372 INFO L87 Difference]: Start difference. First operand 446 states and 505 transitions. Second operand has 38 states, 38 states have (on average 1.5) internal successors, (57), 38 states have internal predecessors, (57), 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) [2023-02-14 11:44:50,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:44:50,553 INFO L93 Difference]: Finished difference Result 532 states and 594 transitions. [2023-02-14 11:44:50,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-14 11:44:50,553 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5) internal successors, (57), 38 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-02-14 11:44:50,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:44:50,554 INFO L225 Difference]: With dead ends: 532 [2023-02-14 11:44:50,554 INFO L226 Difference]: Without dead ends: 504 [2023-02-14 11:44:50,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=283, Invalid=3023, Unknown=0, NotChecked=0, Total=3306 [2023-02-14 11:44:50,555 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 139 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1093 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 11:44:50,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 1093 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 11:44:50,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2023-02-14 11:44:50,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 443. [2023-02-14 11:44:50,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.1380090497737556) internal successors, (503), 442 states have internal predecessors, (503), 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) [2023-02-14 11:44:50,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 503 transitions. [2023-02-14 11:44:50,923 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 503 transitions. Word has length 38 [2023-02-14 11:44:50,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:44:50,923 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 503 transitions. [2023-02-14 11:44:50,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5) internal successors, (57), 38 states have internal predecessors, (57), 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) [2023-02-14 11:44:50,923 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 503 transitions. [2023-02-14 11:44:50,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-14 11:44:50,924 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:44:50,924 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:44:50,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2023-02-14 11:44:51,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2023-02-14 11:44:51,125 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:44:51,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:44:51,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1135200674, now seen corresponding path program 56 times [2023-02-14 11:44:51,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:44:51,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525679955] [2023-02-14 11:44:51,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:44:51,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:44:51,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:44:51,283 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-14 11:44:51,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:44:51,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525679955] [2023-02-14 11:44:51,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525679955] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:44:51,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159183155] [2023-02-14 11:44:51,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 11:44:51,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:44:51,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:44:51,284 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:44:51,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-02-14 11:44:51,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:44:51,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:44:51,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-14 11:44:51,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:44:51,540 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-14 11:44:51,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:44:51,746 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-14 11:44:51,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159183155] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:44:51,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:44:51,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2023-02-14 11:44:51,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120966317] [2023-02-14 11:44:51,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:44:51,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-14 11:44:51,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:44:51,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-14 11:44:51,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2023-02-14 11:44:51,747 INFO L87 Difference]: Start difference. First operand 443 states and 503 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 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) [2023-02-14 11:44:52,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:44:52,715 INFO L93 Difference]: Finished difference Result 505 states and 561 transitions. [2023-02-14 11:44:52,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-14 11:44:52,716 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 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) Word has length 38 [2023-02-14 11:44:52,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:44:52,717 INFO L225 Difference]: With dead ends: 505 [2023-02-14 11:44:52,717 INFO L226 Difference]: Without dead ends: 476 [2023-02-14 11:44:52,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=234, Invalid=1572, Unknown=0, NotChecked=0, Total=1806 [2023-02-14 11:44:52,717 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 597 mSDsluCounter, 1285 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 1373 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 11:44:52,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 1373 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 11:44:52,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2023-02-14 11:44:53,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 443. [2023-02-14 11:44:53,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.1199095022624435) internal successors, (495), 442 states have internal predecessors, (495), 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) [2023-02-14 11:44:53,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 495 transitions. [2023-02-14 11:44:53,105 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 495 transitions. Word has length 38 [2023-02-14 11:44:53,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:44:53,105 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 495 transitions. [2023-02-14 11:44:53,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 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) [2023-02-14 11:44:53,105 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 495 transitions. [2023-02-14 11:44:53,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-14 11:44:53,106 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:44:53,106 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:44:53,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2023-02-14 11:44:53,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2023-02-14 11:44:53,306 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:44:53,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:44:53,306 INFO L85 PathProgramCache]: Analyzing trace with hash 130593719, now seen corresponding path program 57 times [2023-02-14 11:44:53,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:44:53,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224826364] [2023-02-14 11:44:53,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:44:53,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:44:53,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:44:53,575 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:44:53,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:44:53,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224826364] [2023-02-14 11:44:53,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224826364] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:44:53,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535137395] [2023-02-14 11:44:53,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 11:44:53,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:44:53,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:44:53,577 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:44:53,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-02-14 11:44:53,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-14 11:44:53,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:44:53,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-14 11:44:53,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:44:54,137 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:44:54,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:44:54,601 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:44:54,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535137395] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:44:54,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:44:54,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2023-02-14 11:44:54,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599520302] [2023-02-14 11:44:54,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:44:54,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-14 11:44:54,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:44:54,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-14 11:44:54,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2217, Unknown=0, NotChecked=0, Total=2352 [2023-02-14 11:44:54,603 INFO L87 Difference]: Start difference. First operand 443 states and 495 transitions. Second operand has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 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) [2023-02-14 11:44:58,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:44:58,767 INFO L93 Difference]: Finished difference Result 768 states and 835 transitions. [2023-02-14 11:44:58,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-02-14 11:44:58,767 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 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 39 [2023-02-14 11:44:58,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:44:58,769 INFO L225 Difference]: With dead ends: 768 [2023-02-14 11:44:58,769 INFO L226 Difference]: Without dead ends: 726 [2023-02-14 11:44:58,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 41 SyntacticMatches, 9 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2377 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2728, Invalid=10612, Unknown=0, NotChecked=0, Total=13340 [2023-02-14 11:44:58,770 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 1950 mSDsluCounter, 1506 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1950 SdHoareTripleChecker+Valid, 1591 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 11:44:58,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1950 Valid, 1591 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 11:44:58,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2023-02-14 11:44:59,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 490. [2023-02-14 11:44:59,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 1.1186094069529653) internal successors, (547), 489 states have internal predecessors, (547), 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) [2023-02-14 11:44:59,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 547 transitions. [2023-02-14 11:44:59,222 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 547 transitions. Word has length 39 [2023-02-14 11:44:59,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:44:59,222 INFO L495 AbstractCegarLoop]: Abstraction has 490 states and 547 transitions. [2023-02-14 11:44:59,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 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) [2023-02-14 11:44:59,222 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 547 transitions. [2023-02-14 11:44:59,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-14 11:44:59,223 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:44:59,223 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:44:59,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-02-14 11:44:59,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:44:59,427 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:44:59,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:44:59,428 INFO L85 PathProgramCache]: Analyzing trace with hash -443143050, now seen corresponding path program 58 times [2023-02-14 11:44:59,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:44:59,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995073156] [2023-02-14 11:44:59,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:44:59,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:44:59,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:44:59,749 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:44:59,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:44:59,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995073156] [2023-02-14 11:44:59,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995073156] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:44:59,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348976417] [2023-02-14 11:44:59,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 11:44:59,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:44:59,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:44:59,751 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:44:59,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-02-14 11:44:59,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 11:44:59,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:44:59,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-14 11:44:59,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:45:00,361 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:45:00,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:45:00,831 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:45:00,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348976417] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:45:00,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:45:00,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2023-02-14 11:45:00,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842475106] [2023-02-14 11:45:00,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:45:00,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-14 11:45:00,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:45:00,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-14 11:45:00,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2218, Unknown=0, NotChecked=0, Total=2352 [2023-02-14 11:45:00,833 INFO L87 Difference]: Start difference. First operand 490 states and 547 transitions. Second operand has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 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) [2023-02-14 11:45:03,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:45:03,302 INFO L93 Difference]: Finished difference Result 752 states and 814 transitions. [2023-02-14 11:45:03,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-14 11:45:03,303 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 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 39 [2023-02-14 11:45:03,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:45:03,304 INFO L225 Difference]: With dead ends: 752 [2023-02-14 11:45:03,304 INFO L226 Difference]: Without dead ends: 731 [2023-02-14 11:45:03,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 41 SyntacticMatches, 9 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=477, Invalid=4779, Unknown=0, NotChecked=0, Total=5256 [2023-02-14 11:45:03,305 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 1532 mSDsluCounter, 3810 mSDsCounter, 0 mSdLazyCounter, 1365 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1532 SdHoareTripleChecker+Valid, 3958 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 11:45:03,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1532 Valid, 3958 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1365 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 11:45:03,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2023-02-14 11:45:03,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 495. [2023-02-14 11:45:03,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 1.1174089068825912) internal successors, (552), 494 states have internal predecessors, (552), 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) [2023-02-14 11:45:03,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 552 transitions. [2023-02-14 11:45:03,747 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 552 transitions. Word has length 39 [2023-02-14 11:45:03,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:45:03,747 INFO L495 AbstractCegarLoop]: Abstraction has 495 states and 552 transitions. [2023-02-14 11:45:03,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 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) [2023-02-14 11:45:03,747 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 552 transitions. [2023-02-14 11:45:03,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-14 11:45:03,748 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:45:03,748 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:45:03,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-02-14 11:45:03,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:03,949 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:45:03,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:45:03,949 INFO L85 PathProgramCache]: Analyzing trace with hash -24932840, now seen corresponding path program 59 times [2023-02-14 11:45:03,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:45:03,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708446290] [2023-02-14 11:45:03,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:03,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:45:03,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:45:04,040 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-14 11:45:04,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:45:04,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708446290] [2023-02-14 11:45:04,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708446290] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:45:04,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511047218] [2023-02-14 11:45:04,040 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 11:45:04,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:04,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:45:04,042 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:45:04,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-02-14 11:45:04,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-14 11:45:04,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:45:04,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-14 11:45:04,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:45:04,155 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-14 11:45:04,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:45:04,215 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-14 11:45:04,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511047218] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:45:04,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:45:04,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-02-14 11:45:04,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706669803] [2023-02-14 11:45:04,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:45:04,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-14 11:45:04,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:45:04,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-14 11:45:04,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2023-02-14 11:45:04,216 INFO L87 Difference]: Start difference. First operand 495 states and 552 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2023-02-14 11:45:04,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:45:04,818 INFO L93 Difference]: Finished difference Result 622 states and 690 transitions. [2023-02-14 11:45:04,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-14 11:45:04,819 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) Word has length 39 [2023-02-14 11:45:04,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:45:04,820 INFO L225 Difference]: With dead ends: 622 [2023-02-14 11:45:04,820 INFO L226 Difference]: Without dead ends: 514 [2023-02-14 11:45:04,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 61 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=566, Unknown=0, NotChecked=0, Total=870 [2023-02-14 11:45:04,821 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 151 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:45:04,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 372 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:45:04,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2023-02-14 11:45:05,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 481. [2023-02-14 11:45:05,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 1.1125) internal successors, (534), 480 states have internal predecessors, (534), 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) [2023-02-14 11:45:05,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 534 transitions. [2023-02-14 11:45:05,257 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 534 transitions. Word has length 39 [2023-02-14 11:45:05,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:45:05,257 INFO L495 AbstractCegarLoop]: Abstraction has 481 states and 534 transitions. [2023-02-14 11:45:05,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2023-02-14 11:45:05,257 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 534 transitions. [2023-02-14 11:45:05,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-14 11:45:05,257 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:45:05,258 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:45:05,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2023-02-14 11:45:05,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-02-14 11:45:05,458 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:45:05,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:45:05,458 INFO L85 PathProgramCache]: Analyzing trace with hash -601397259, now seen corresponding path program 60 times [2023-02-14 11:45:05,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:45:05,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881821759] [2023-02-14 11:45:05,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:05,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:45:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:45:05,563 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-14 11:45:05,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:45:05,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881821759] [2023-02-14 11:45:05,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881821759] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:45:05,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404450072] [2023-02-14 11:45:05,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 11:45:05,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:05,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:45:05,567 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:45:05,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-02-14 11:45:05,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-14 11:45:05,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:45:05,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-14 11:45:05,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:45:05,698 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-14 11:45:05,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:45:05,757 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-14 11:45:05,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404450072] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:45:05,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:45:05,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-02-14 11:45:05,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974429907] [2023-02-14 11:45:05,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:45:05,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-14 11:45:05,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:45:05,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-14 11:45:05,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2023-02-14 11:45:05,758 INFO L87 Difference]: Start difference. First operand 481 states and 534 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2023-02-14 11:45:06,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:45:06,366 INFO L93 Difference]: Finished difference Result 521 states and 570 transitions. [2023-02-14 11:45:06,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-14 11:45:06,367 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) Word has length 39 [2023-02-14 11:45:06,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:45:06,368 INFO L225 Difference]: With dead ends: 521 [2023-02-14 11:45:06,368 INFO L226 Difference]: Without dead ends: 515 [2023-02-14 11:45:06,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 61 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=566, Unknown=0, NotChecked=0, Total=870 [2023-02-14 11:45:06,369 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 71 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:45:06,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 310 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:45:06,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2023-02-14 11:45:06,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 482. [2023-02-14 11:45:06,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.1122661122661122) internal successors, (535), 481 states have internal predecessors, (535), 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) [2023-02-14 11:45:06,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 535 transitions. [2023-02-14 11:45:06,872 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 535 transitions. Word has length 39 [2023-02-14 11:45:06,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:45:06,872 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 535 transitions. [2023-02-14 11:45:06,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2023-02-14 11:45:06,872 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 535 transitions. [2023-02-14 11:45:06,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-14 11:45:06,873 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:45:06,873 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:45:06,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-02-14 11:45:07,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-02-14 11:45:07,078 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:45:07,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:45:07,078 INFO L85 PathProgramCache]: Analyzing trace with hash -189895216, now seen corresponding path program 61 times [2023-02-14 11:45:07,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:45:07,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865956198] [2023-02-14 11:45:07,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:07,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:45:07,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:45:07,673 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:45:07,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:45:07,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865956198] [2023-02-14 11:45:07,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865956198] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:45:07,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014805294] [2023-02-14 11:45:07,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 11:45:07,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:07,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:45:07,675 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:45:07,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-02-14 11:45:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:45:07,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-14 11:45:07,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:45:08,204 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:45:08,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:45:08,398 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:45:08,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014805294] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:45:08,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:45:08,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 47 [2023-02-14 11:45:08,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945705540] [2023-02-14 11:45:08,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:45:08,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-14 11:45:08,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:45:08,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-14 11:45:08,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2049, Unknown=0, NotChecked=0, Total=2162 [2023-02-14 11:45:08,400 INFO L87 Difference]: Start difference. First operand 482 states and 535 transitions. Second operand has 47 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 47 states have internal predecessors, (65), 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) [2023-02-14 11:45:10,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:45:10,907 INFO L93 Difference]: Finished difference Result 872 states and 936 transitions. [2023-02-14 11:45:10,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-14 11:45:10,908 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 47 states have internal predecessors, (65), 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 40 [2023-02-14 11:45:10,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:45:10,910 INFO L225 Difference]: With dead ends: 872 [2023-02-14 11:45:10,910 INFO L226 Difference]: Without dead ends: 863 [2023-02-14 11:45:10,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=340, Invalid=5360, Unknown=0, NotChecked=0, Total=5700 [2023-02-14 11:45:10,910 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 323 mSDsluCounter, 4477 mSDsCounter, 0 mSdLazyCounter, 2082 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 4628 SdHoareTripleChecker+Invalid, 2083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-14 11:45:10,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 4628 Invalid, 2083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2082 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-14 11:45:10,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2023-02-14 11:45:11,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 491. [2023-02-14 11:45:11,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 1.1122448979591837) internal successors, (545), 490 states have internal predecessors, (545), 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) [2023-02-14 11:45:11,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 545 transitions. [2023-02-14 11:45:11,350 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 545 transitions. Word has length 40 [2023-02-14 11:45:11,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:45:11,350 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 545 transitions. [2023-02-14 11:45:11,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 47 states have internal predecessors, (65), 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) [2023-02-14 11:45:11,350 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 545 transitions. [2023-02-14 11:45:11,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-14 11:45:11,351 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:45:11,351 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:45:11,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2023-02-14 11:45:11,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:11,553 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:45:11,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:45:11,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1171113072, now seen corresponding path program 62 times [2023-02-14 11:45:11,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:45:11,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009347386] [2023-02-14 11:45:11,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:11,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:45:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:45:11,995 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 11:45:11,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:45:11,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009347386] [2023-02-14 11:45:11,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009347386] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:45:11,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484938885] [2023-02-14 11:45:11,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 11:45:11,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:11,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:45:12,005 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:45:12,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-02-14 11:45:12,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:45:12,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:45:12,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-14 11:45:12,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:45:12,511 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 11:45:12,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:45:12,709 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 11:45:12,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484938885] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:45:12,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:45:12,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 45 [2023-02-14 11:45:12,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497459064] [2023-02-14 11:45:12,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:45:12,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-14 11:45:12,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:45:12,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-14 11:45:12,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1868, Unknown=0, NotChecked=0, Total=1980 [2023-02-14 11:45:12,711 INFO L87 Difference]: Start difference. First operand 491 states and 545 transitions. Second operand has 45 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 45 states have internal predecessors, (64), 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) [2023-02-14 11:45:14,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:45:14,743 INFO L93 Difference]: Finished difference Result 719 states and 772 transitions. [2023-02-14 11:45:14,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-14 11:45:14,743 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 45 states have internal predecessors, (64), 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 40 [2023-02-14 11:45:14,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:45:14,745 INFO L225 Difference]: With dead ends: 719 [2023-02-14 11:45:14,745 INFO L226 Difference]: Without dead ends: 692 [2023-02-14 11:45:14,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=313, Invalid=4657, Unknown=0, NotChecked=0, Total=4970 [2023-02-14 11:45:14,746 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 238 mSDsluCounter, 3138 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 3261 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 11:45:14,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 3261 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1501 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 11:45:14,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2023-02-14 11:45:15,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 482. [2023-02-14 11:45:15,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.1122661122661122) internal successors, (535), 481 states have internal predecessors, (535), 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) [2023-02-14 11:45:15,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 535 transitions. [2023-02-14 11:45:15,206 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 535 transitions. Word has length 40 [2023-02-14 11:45:15,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:45:15,206 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 535 transitions. [2023-02-14 11:45:15,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 45 states have internal predecessors, (64), 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) [2023-02-14 11:45:15,207 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 535 transitions. [2023-02-14 11:45:15,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-14 11:45:15,207 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:45:15,207 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:45:15,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-02-14 11:45:15,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2023-02-14 11:45:15,408 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:45:15,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:45:15,408 INFO L85 PathProgramCache]: Analyzing trace with hash 722054608, now seen corresponding path program 63 times [2023-02-14 11:45:15,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:45:15,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768410251] [2023-02-14 11:45:15,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:15,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:45:15,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:45:15,792 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 11:45:15,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:45:15,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768410251] [2023-02-14 11:45:15,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768410251] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:45:15,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510342460] [2023-02-14 11:45:15,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 11:45:15,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:15,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:45:15,794 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:45:15,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-02-14 11:45:15,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-14 11:45:15,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:45:15,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 54 conjunts are in the unsatisfiable core [2023-02-14 11:45:15,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:45:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 11:45:16,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:45:16,469 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 11:45:16,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510342460] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:45:16,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:45:16,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 43 [2023-02-14 11:45:16,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068105170] [2023-02-14 11:45:16,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:45:16,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-14 11:45:16,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:45:16,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-14 11:45:16,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1695, Unknown=0, NotChecked=0, Total=1806 [2023-02-14 11:45:16,470 INFO L87 Difference]: Start difference. First operand 482 states and 535 transitions. Second operand has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 43 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:45:18,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:45:18,143 INFO L93 Difference]: Finished difference Result 617 states and 669 transitions. [2023-02-14 11:45:18,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-14 11:45:18,143 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 43 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-02-14 11:45:18,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:45:18,145 INFO L225 Difference]: With dead ends: 617 [2023-02-14 11:45:18,145 INFO L226 Difference]: Without dead ends: 589 [2023-02-14 11:45:18,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=307, Invalid=4115, Unknown=0, NotChecked=0, Total=4422 [2023-02-14 11:45:18,146 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 192 mSDsluCounter, 2311 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 2400 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 11:45:18,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 2400 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1250 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 11:45:18,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2023-02-14 11:45:18,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 471. [2023-02-14 11:45:18,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.1127659574468085) internal successors, (523), 470 states have internal predecessors, (523), 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) [2023-02-14 11:45:18,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 523 transitions. [2023-02-14 11:45:18,565 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 523 transitions. Word has length 40 [2023-02-14 11:45:18,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:45:18,566 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 523 transitions. [2023-02-14 11:45:18,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 43 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:45:18,566 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 523 transitions. [2023-02-14 11:45:18,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-14 11:45:18,566 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:45:18,566 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:45:18,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2023-02-14 11:45:18,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:18,767 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:45:18,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:45:18,767 INFO L85 PathProgramCache]: Analyzing trace with hash -923927664, now seen corresponding path program 64 times [2023-02-14 11:45:18,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:45:18,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509503074] [2023-02-14 11:45:18,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:18,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:45:18,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:45:19,124 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-14 11:45:19,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:45:19,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509503074] [2023-02-14 11:45:19,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509503074] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:45:19,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222536044] [2023-02-14 11:45:19,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 11:45:19,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:19,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:45:19,125 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:45:19,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-02-14 11:45:19,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 11:45:19,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:45:19,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-14 11:45:19,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:45:19,606 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-14 11:45:19,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:45:19,830 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-14 11:45:19,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222536044] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:45:19,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:45:19,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 41 [2023-02-14 11:45:19,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356171798] [2023-02-14 11:45:19,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:45:19,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-14 11:45:19,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:45:19,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-14 11:45:19,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1530, Unknown=0, NotChecked=0, Total=1640 [2023-02-14 11:45:19,831 INFO L87 Difference]: Start difference. First operand 471 states and 523 transitions. Second operand has 41 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 41 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) [2023-02-14 11:45:21,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:45:21,101 INFO L93 Difference]: Finished difference Result 535 states and 586 transitions. [2023-02-14 11:45:21,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-14 11:45:21,102 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 41 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 40 [2023-02-14 11:45:21,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:45:21,103 INFO L225 Difference]: With dead ends: 535 [2023-02-14 11:45:21,103 INFO L226 Difference]: Without dead ends: 506 [2023-02-14 11:45:21,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=301, Invalid=3605, Unknown=0, NotChecked=0, Total=3906 [2023-02-14 11:45:21,103 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 144 mSDsluCounter, 1294 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 1349 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 11:45:21,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 1349 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 11:45:21,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2023-02-14 11:45:21,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 458. [2023-02-14 11:45:21,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 1.113785557986871) internal successors, (509), 457 states have internal predecessors, (509), 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) [2023-02-14 11:45:21,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 509 transitions. [2023-02-14 11:45:21,511 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 509 transitions. Word has length 40 [2023-02-14 11:45:21,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:45:21,511 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 509 transitions. [2023-02-14 11:45:21,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 41 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) [2023-02-14 11:45:21,511 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 509 transitions. [2023-02-14 11:45:21,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-14 11:45:21,512 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:45:21,512 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:45:21,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2023-02-14 11:45:21,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:21,718 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:45:21,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:45:21,718 INFO L85 PathProgramCache]: Analyzing trace with hash 137817552, now seen corresponding path program 65 times [2023-02-14 11:45:21,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:45:21,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212573490] [2023-02-14 11:45:21,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:21,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:45:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:45:22,089 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-14 11:45:22,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:45:22,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212573490] [2023-02-14 11:45:22,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212573490] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:45:22,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264287754] [2023-02-14 11:45:22,090 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 11:45:22,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:22,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:45:22,091 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:45:22,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-02-14 11:45:22,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-14 11:45:22,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:45:22,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-14 11:45:22,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:45:22,684 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 11:45:22,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:45:22,860 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-14 11:45:22,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264287754] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:45:22,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:45:22,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 27, 22] total 44 [2023-02-14 11:45:22,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693385834] [2023-02-14 11:45:22,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:45:22,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-14 11:45:22,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:45:22,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-14 11:45:22,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1768, Unknown=0, NotChecked=0, Total=1892 [2023-02-14 11:45:22,862 INFO L87 Difference]: Start difference. First operand 458 states and 509 transitions. Second operand has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 44 states have internal predecessors, (64), 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) [2023-02-14 11:45:24,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:45:24,086 INFO L93 Difference]: Finished difference Result 504 states and 557 transitions. [2023-02-14 11:45:24,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-14 11:45:24,087 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 44 states have internal predecessors, (64), 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 40 [2023-02-14 11:45:24,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:45:24,088 INFO L225 Difference]: With dead ends: 504 [2023-02-14 11:45:24,088 INFO L226 Difference]: Without dead ends: 498 [2023-02-14 11:45:24,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 52 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=340, Invalid=4352, Unknown=0, NotChecked=0, Total=4692 [2023-02-14 11:45:24,089 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 139 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 11:45:24,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 692 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 11:45:24,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2023-02-14 11:45:24,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 471. [2023-02-14 11:45:24,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.1148936170212767) internal successors, (524), 470 states have internal predecessors, (524), 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) [2023-02-14 11:45:24,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 524 transitions. [2023-02-14 11:45:24,532 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 524 transitions. Word has length 40 [2023-02-14 11:45:24,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:45:24,532 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 524 transitions. [2023-02-14 11:45:24,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 44 states have internal predecessors, (64), 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) [2023-02-14 11:45:24,532 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 524 transitions. [2023-02-14 11:45:24,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-14 11:45:24,533 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:45:24,533 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:45:24,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2023-02-14 11:45:24,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2023-02-14 11:45:24,733 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:45:24,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:45:24,734 INFO L85 PathProgramCache]: Analyzing trace with hash -929146954, now seen corresponding path program 66 times [2023-02-14 11:45:24,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:45:24,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001707961] [2023-02-14 11:45:24,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:24,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:45:24,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:45:25,031 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:45:25,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:45:25,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001707961] [2023-02-14 11:45:25,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001707961] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:45:25,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613544628] [2023-02-14 11:45:25,032 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 11:45:25,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:25,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:45:25,033 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:45:25,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-02-14 11:45:25,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-02-14 11:45:25,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:45:25,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-14 11:45:25,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:45:25,676 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:45:25,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:45:26,298 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:45:26,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613544628] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:45:26,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:45:26,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 54 [2023-02-14 11:45:26,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080401875] [2023-02-14 11:45:26,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:45:26,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-14 11:45:26,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:45:26,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-14 11:45:26,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2713, Unknown=0, NotChecked=0, Total=2862 [2023-02-14 11:45:26,304 INFO L87 Difference]: Start difference. First operand 471 states and 524 transitions. Second operand has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 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) [2023-02-14 11:45:31,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:45:31,685 INFO L93 Difference]: Finished difference Result 834 states and 902 transitions. [2023-02-14 11:45:31,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-02-14 11:45:31,686 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 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 41 [2023-02-14 11:45:31,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:45:31,688 INFO L225 Difference]: With dead ends: 834 [2023-02-14 11:45:31,688 INFO L226 Difference]: Without dead ends: 790 [2023-02-14 11:45:31,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 41 SyntacticMatches, 10 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3329 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3617, Invalid=14205, Unknown=0, NotChecked=0, Total=17822 [2023-02-14 11:45:31,689 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 2814 mSDsluCounter, 1814 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2814 SdHoareTripleChecker+Valid, 1907 SdHoareTripleChecker+Invalid, 1241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 11:45:31,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2814 Valid, 1907 Invalid, 1241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 11:45:31,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2023-02-14 11:45:32,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 519. [2023-02-14 11:45:32,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 1.113899613899614) internal successors, (577), 518 states have internal predecessors, (577), 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) [2023-02-14 11:45:32,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 577 transitions. [2023-02-14 11:45:32,173 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 577 transitions. Word has length 41 [2023-02-14 11:45:32,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:45:32,173 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 577 transitions. [2023-02-14 11:45:32,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 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) [2023-02-14 11:45:32,174 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 577 transitions. [2023-02-14 11:45:32,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-14 11:45:32,174 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:45:32,174 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:45:32,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2023-02-14 11:45:32,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:32,375 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:45:32,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:45:32,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1535117609, now seen corresponding path program 67 times [2023-02-14 11:45:32,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:45:32,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937356366] [2023-02-14 11:45:32,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:32,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:45:32,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:45:32,679 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:45:32,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:45:32,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937356366] [2023-02-14 11:45:32,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937356366] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:45:32,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966188278] [2023-02-14 11:45:32,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 11:45:32,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:32,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:45:32,681 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:45:32,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-02-14 11:45:32,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:45:32,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-14 11:45:32,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:45:33,335 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:45:33,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:45:33,971 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:45:33,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966188278] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:45:33,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:45:33,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 54 [2023-02-14 11:45:33,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916681068] [2023-02-14 11:45:33,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:45:33,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-14 11:45:33,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:45:33,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-14 11:45:33,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2714, Unknown=0, NotChecked=0, Total=2862 [2023-02-14 11:45:33,973 INFO L87 Difference]: Start difference. First operand 519 states and 577 transitions. Second operand has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 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) [2023-02-14 11:45:37,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:45:37,159 INFO L93 Difference]: Finished difference Result 817 states and 880 transitions. [2023-02-14 11:45:37,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-14 11:45:37,159 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 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 41 [2023-02-14 11:45:37,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:45:37,161 INFO L225 Difference]: With dead ends: 817 [2023-02-14 11:45:37,161 INFO L226 Difference]: Without dead ends: 795 [2023-02-14 11:45:37,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 41 SyntacticMatches, 10 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=561, Invalid=5919, Unknown=0, NotChecked=0, Total=6480 [2023-02-14 11:45:37,162 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 1897 mSDsluCounter, 5103 mSDsCounter, 0 mSdLazyCounter, 1854 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1897 SdHoareTripleChecker+Valid, 5267 SdHoareTripleChecker+Invalid, 1915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-14 11:45:37,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1897 Valid, 5267 Invalid, 1915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1854 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-14 11:45:37,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2023-02-14 11:45:37,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 524. [2023-02-14 11:45:37,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 1.112810707456979) internal successors, (582), 523 states have internal predecessors, (582), 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) [2023-02-14 11:45:37,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 582 transitions. [2023-02-14 11:45:37,721 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 582 transitions. Word has length 41 [2023-02-14 11:45:37,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:45:37,722 INFO L495 AbstractCegarLoop]: Abstraction has 524 states and 582 transitions. [2023-02-14 11:45:37,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 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) [2023-02-14 11:45:37,722 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 582 transitions. [2023-02-14 11:45:37,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-14 11:45:37,722 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:45:37,722 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:45:37,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2023-02-14 11:45:37,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:37,923 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:45:37,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:45:37,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1578640213, now seen corresponding path program 68 times [2023-02-14 11:45:37,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:45:37,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563168695] [2023-02-14 11:45:37,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:37,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:45:37,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:45:38,055 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-14 11:45:38,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:45:38,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563168695] [2023-02-14 11:45:38,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563168695] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:45:38,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56003] [2023-02-14 11:45:38,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 11:45:38,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:38,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:45:38,056 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:45:38,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-02-14 11:45:38,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:45:38,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:45:38,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-14 11:45:38,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:45:38,186 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-14 11:45:38,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:45:38,259 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-14 11:45:38,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56003] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:45:38,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:45:38,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 22 [2023-02-14 11:45:38,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571591750] [2023-02-14 11:45:38,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:45:38,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-14 11:45:38,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:45:38,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-14 11:45:38,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2023-02-14 11:45:38,262 INFO L87 Difference]: Start difference. First operand 524 states and 582 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 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) [2023-02-14 11:45:39,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:45:39,170 INFO L93 Difference]: Finished difference Result 618 states and 684 transitions. [2023-02-14 11:45:39,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-14 11:45:39,171 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 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 41 [2023-02-14 11:45:39,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:45:39,172 INFO L225 Difference]: With dead ends: 618 [2023-02-14 11:45:39,172 INFO L226 Difference]: Without dead ends: 602 [2023-02-14 11:45:39,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 63 SyntacticMatches, 11 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=933, Unknown=0, NotChecked=0, Total=1260 [2023-02-14 11:45:39,172 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 185 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:45:39,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 283 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 11:45:39,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2023-02-14 11:45:39,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 558. [2023-02-14 11:45:39,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 1.125673249551167) internal successors, (627), 557 states have internal predecessors, (627), 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) [2023-02-14 11:45:39,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 627 transitions. [2023-02-14 11:45:39,760 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 627 transitions. Word has length 41 [2023-02-14 11:45:39,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:45:39,760 INFO L495 AbstractCegarLoop]: Abstraction has 558 states and 627 transitions. [2023-02-14 11:45:39,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 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) [2023-02-14 11:45:39,760 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 627 transitions. [2023-02-14 11:45:39,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-14 11:45:39,761 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:45:39,761 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:45:39,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2023-02-14 11:45:39,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:39,961 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:45:39,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:45:39,962 INFO L85 PathProgramCache]: Analyzing trace with hash 888112408, now seen corresponding path program 69 times [2023-02-14 11:45:39,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:45:39,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389460127] [2023-02-14 11:45:39,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:39,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:45:39,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:45:40,058 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-14 11:45:40,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:45:40,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389460127] [2023-02-14 11:45:40,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389460127] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:45:40,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609400149] [2023-02-14 11:45:40,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 11:45:40,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:40,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:45:40,059 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:45:40,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-02-14 11:45:40,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-14 11:45:40,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:45:40,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-14 11:45:40,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:45:40,190 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-14 11:45:40,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:45:40,254 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-14 11:45:40,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609400149] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:45:40,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:45:40,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 22 [2023-02-14 11:45:40,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272727658] [2023-02-14 11:45:40,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:45:40,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-14 11:45:40,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:45:40,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-14 11:45:40,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2023-02-14 11:45:40,256 INFO L87 Difference]: Start difference. First operand 558 states and 627 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 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) [2023-02-14 11:45:41,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:45:41,482 INFO L93 Difference]: Finished difference Result 996 states and 1135 transitions. [2023-02-14 11:45:41,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-14 11:45:41,483 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 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 41 [2023-02-14 11:45:41,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:45:41,485 INFO L225 Difference]: With dead ends: 996 [2023-02-14 11:45:41,485 INFO L226 Difference]: Without dead ends: 834 [2023-02-14 11:45:41,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 63 SyntacticMatches, 11 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=933, Unknown=0, NotChecked=0, Total=1260 [2023-02-14 11:45:41,486 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 385 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:45:41,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 519 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 11:45:41,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2023-02-14 11:45:42,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 640. [2023-02-14 11:45:42,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 1.1267605633802817) internal successors, (720), 639 states have internal predecessors, (720), 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) [2023-02-14 11:45:42,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 720 transitions. [2023-02-14 11:45:42,170 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 720 transitions. Word has length 41 [2023-02-14 11:45:42,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:45:42,170 INFO L495 AbstractCegarLoop]: Abstraction has 640 states and 720 transitions. [2023-02-14 11:45:42,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 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) [2023-02-14 11:45:42,170 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 720 transitions. [2023-02-14 11:45:42,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-14 11:45:42,171 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:45:42,171 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:45:42,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2023-02-14 11:45:42,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2023-02-14 11:45:42,376 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:45:42,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:45:42,376 INFO L85 PathProgramCache]: Analyzing trace with hash 318631823, now seen corresponding path program 70 times [2023-02-14 11:45:42,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:45:42,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176079267] [2023-02-14 11:45:42,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:42,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:45:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:45:42,941 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:45:42,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:45:42,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176079267] [2023-02-14 11:45:42,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176079267] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:45:42,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889726036] [2023-02-14 11:45:42,942 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 11:45:42,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:42,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:45:42,943 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:45:42,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-02-14 11:45:42,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 11:45:42,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:45:42,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-14 11:45:42,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:45:43,524 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:45:43,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:45:43,728 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:45:43,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889726036] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:45:43,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:45:43,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 50 [2023-02-14 11:45:43,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46884400] [2023-02-14 11:45:43,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:45:43,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-14 11:45:43,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:45:43,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-14 11:45:43,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=2330, Unknown=0, NotChecked=0, Total=2450 [2023-02-14 11:45:43,730 INFO L87 Difference]: Start difference. First operand 640 states and 720 transitions. Second operand has 50 states, 50 states have (on average 1.36) internal successors, (68), 50 states have internal predecessors, (68), 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) [2023-02-14 11:45:47,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:45:47,220 INFO L93 Difference]: Finished difference Result 1165 states and 1259 transitions. [2023-02-14 11:45:47,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-14 11:45:47,221 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.36) internal successors, (68), 50 states have internal predecessors, (68), 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 42 [2023-02-14 11:45:47,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:45:47,223 INFO L225 Difference]: With dead ends: 1165 [2023-02-14 11:45:47,223 INFO L226 Difference]: Without dead ends: 1156 [2023-02-14 11:45:47,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=359, Invalid=6121, Unknown=0, NotChecked=0, Total=6480 [2023-02-14 11:45:47,224 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 346 mSDsluCounter, 5499 mSDsCounter, 0 mSdLazyCounter, 2520 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 5667 SdHoareTripleChecker+Invalid, 2521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-14 11:45:47,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 5667 Invalid, 2521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2520 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-14 11:45:47,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2023-02-14 11:45:47,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 649. [2023-02-14 11:45:47,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 1.126543209876543) internal successors, (730), 648 states have internal predecessors, (730), 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) [2023-02-14 11:45:47,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 730 transitions. [2023-02-14 11:45:47,857 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 730 transitions. Word has length 42 [2023-02-14 11:45:47,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:45:47,858 INFO L495 AbstractCegarLoop]: Abstraction has 649 states and 730 transitions. [2023-02-14 11:45:47,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.36) internal successors, (68), 50 states have internal predecessors, (68), 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) [2023-02-14 11:45:47,858 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 730 transitions. [2023-02-14 11:45:47,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-14 11:45:47,859 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:45:47,859 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:45:47,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2023-02-14 11:45:48,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:48,065 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:45:48,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:45:48,065 INFO L85 PathProgramCache]: Analyzing trace with hash -225136977, now seen corresponding path program 71 times [2023-02-14 11:45:48,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:45:48,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019962471] [2023-02-14 11:45:48,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:48,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:45:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:45:48,540 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 11:45:48,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:45:48,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019962471] [2023-02-14 11:45:48,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019962471] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:45:48,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590604265] [2023-02-14 11:45:48,541 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 11:45:48,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:48,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:45:48,542 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:45:48,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-02-14 11:45:48,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-14 11:45:48,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:45:48,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-14 11:45:48,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:45:49,092 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 11:45:49,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:45:49,304 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 11:45:49,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590604265] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:45:49,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:45:49,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 48 [2023-02-14 11:45:49,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743555889] [2023-02-14 11:45:49,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:45:49,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-14 11:45:49,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:45:49,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-14 11:45:49,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=2137, Unknown=0, NotChecked=0, Total=2256 [2023-02-14 11:45:49,307 INFO L87 Difference]: Start difference. First operand 649 states and 730 transitions. Second operand has 48 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 48 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:45:52,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:45:52,411 INFO L93 Difference]: Finished difference Result 983 states and 1063 transitions. [2023-02-14 11:45:52,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-14 11:45:52,412 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 48 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-02-14 11:45:52,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:45:52,414 INFO L225 Difference]: With dead ends: 983 [2023-02-14 11:45:52,414 INFO L226 Difference]: Without dead ends: 955 [2023-02-14 11:45:52,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=331, Invalid=5369, Unknown=0, NotChecked=0, Total=5700 [2023-02-14 11:45:52,415 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 258 mSDsluCounter, 4302 mSDsCounter, 0 mSdLazyCounter, 2110 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 4438 SdHoareTripleChecker+Invalid, 2111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-14 11:45:52,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 4438 Invalid, 2111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2110 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-14 11:45:52,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2023-02-14 11:45:53,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 640. [2023-02-14 11:45:53,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 1.1267605633802817) internal successors, (720), 639 states have internal predecessors, (720), 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) [2023-02-14 11:45:53,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 720 transitions. [2023-02-14 11:45:53,060 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 720 transitions. Word has length 42 [2023-02-14 11:45:53,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:45:53,061 INFO L495 AbstractCegarLoop]: Abstraction has 640 states and 720 transitions. [2023-02-14 11:45:53,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 48 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:45:53,061 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 720 transitions. [2023-02-14 11:45:53,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-14 11:45:53,062 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:45:53,062 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:45:53,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2023-02-14 11:45:53,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:53,265 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:45:53,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:45:53,265 INFO L85 PathProgramCache]: Analyzing trace with hash -284040433, now seen corresponding path program 72 times [2023-02-14 11:45:53,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:45:53,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544922356] [2023-02-14 11:45:53,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:53,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:45:53,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:45:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 11:45:53,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:45:53,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544922356] [2023-02-14 11:45:53,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544922356] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:45:53,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394800641] [2023-02-14 11:45:53,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 11:45:53,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:53,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:45:53,737 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:45:53,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-02-14 11:45:53,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-14 11:45:53,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:45:53,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-14 11:45:53,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:45:54,306 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 11:45:54,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:45:54,505 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 11:45:54,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394800641] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:45:54,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:45:54,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 46 [2023-02-14 11:45:54,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426045938] [2023-02-14 11:45:54,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:45:54,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-14 11:45:54,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:45:54,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-14 11:45:54,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1952, Unknown=0, NotChecked=0, Total=2070 [2023-02-14 11:45:54,507 INFO L87 Difference]: Start difference. First operand 640 states and 720 transitions. Second operand has 46 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 46 states have internal predecessors, (65), 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) [2023-02-14 11:45:56,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:45:56,924 INFO L93 Difference]: Finished difference Result 853 states and 932 transitions. [2023-02-14 11:45:56,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-14 11:45:56,924 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 46 states have internal predecessors, (65), 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 42 [2023-02-14 11:45:56,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:45:56,926 INFO L225 Difference]: With dead ends: 853 [2023-02-14 11:45:56,926 INFO L226 Difference]: Without dead ends: 824 [2023-02-14 11:45:56,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=325, Invalid=4787, Unknown=0, NotChecked=0, Total=5112 [2023-02-14 11:45:56,926 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 218 mSDsluCounter, 2806 mSDsCounter, 0 mSdLazyCounter, 1519 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 2908 SdHoareTripleChecker+Invalid, 1520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 11:45:56,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 2908 Invalid, 1520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1519 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 11:45:56,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2023-02-14 11:45:57,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 629. [2023-02-14 11:45:57,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 1.127388535031847) internal successors, (708), 628 states have internal predecessors, (708), 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) [2023-02-14 11:45:57,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 708 transitions. [2023-02-14 11:45:57,570 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 708 transitions. Word has length 42 [2023-02-14 11:45:57,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:45:57,570 INFO L495 AbstractCegarLoop]: Abstraction has 629 states and 708 transitions. [2023-02-14 11:45:57,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 46 states have internal predecessors, (65), 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) [2023-02-14 11:45:57,570 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 708 transitions. [2023-02-14 11:45:57,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-14 11:45:57,571 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:45:57,571 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:45:57,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2023-02-14 11:45:57,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2023-02-14 11:45:57,773 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:45:57,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:45:57,773 INFO L85 PathProgramCache]: Analyzing trace with hash -2122368209, now seen corresponding path program 73 times [2023-02-14 11:45:57,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:45:57,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819688063] [2023-02-14 11:45:57,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:45:57,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:45:57,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:45:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-14 11:45:58,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:45:58,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819688063] [2023-02-14 11:45:58,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819688063] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:45:58,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161391056] [2023-02-14 11:45:58,178 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 11:45:58,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:45:58,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:45:58,179 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:45:58,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-02-14 11:45:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:45:58,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 54 conjunts are in the unsatisfiable core [2023-02-14 11:45:58,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:45:58,697 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-14 11:45:58,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:45:58,885 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-14 11:45:58,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161391056] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:45:58,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:45:58,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 44 [2023-02-14 11:45:58,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34723491] [2023-02-14 11:45:58,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:45:58,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-14 11:45:58,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:45:58,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-14 11:45:58,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1775, Unknown=0, NotChecked=0, Total=1892 [2023-02-14 11:45:58,886 INFO L87 Difference]: Start difference. First operand 629 states and 708 transitions. Second operand has 44 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 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) [2023-02-14 11:46:00,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:46:00,870 INFO L93 Difference]: Finished difference Result 754 states and 832 transitions. [2023-02-14 11:46:00,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-14 11:46:00,870 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 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 42 [2023-02-14 11:46:00,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:46:00,872 INFO L225 Difference]: With dead ends: 754 [2023-02-14 11:46:00,872 INFO L226 Difference]: Without dead ends: 724 [2023-02-14 11:46:00,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=319, Invalid=4237, Unknown=0, NotChecked=0, Total=4556 [2023-02-14 11:46:00,872 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 168 mSDsluCounter, 1872 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1940 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 11:46:00,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 1940 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 11:46:00,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2023-02-14 11:46:01,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 616. [2023-02-14 11:46:01,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 1.1284552845528455) internal successors, (694), 615 states have internal predecessors, (694), 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) [2023-02-14 11:46:01,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 694 transitions. [2023-02-14 11:46:01,528 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 694 transitions. Word has length 42 [2023-02-14 11:46:01,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:46:01,528 INFO L495 AbstractCegarLoop]: Abstraction has 616 states and 694 transitions. [2023-02-14 11:46:01,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 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) [2023-02-14 11:46:01,528 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 694 transitions. [2023-02-14 11:46:01,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-14 11:46:01,529 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:46:01,529 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:46:01,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2023-02-14 11:46:01,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:46:01,729 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:46:01,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:46:01,730 INFO L85 PathProgramCache]: Analyzing trace with hash -147720610, now seen corresponding path program 74 times [2023-02-14 11:46:01,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:46:01,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927478849] [2023-02-14 11:46:01,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:46:01,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:46:01,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:46:01,901 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-14 11:46:01,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:46:01,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927478849] [2023-02-14 11:46:01,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927478849] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:46:01,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108676460] [2023-02-14 11:46:01,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 11:46:01,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:46:01,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:46:01,903 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:46:01,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2023-02-14 11:46:01,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:46:01,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:46:01,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-14 11:46:01,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:46:02,201 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-14 11:46:02,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:46:02,441 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-14 11:46:02,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108676460] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:46:02,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:46:02,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 35 [2023-02-14 11:46:02,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077435558] [2023-02-14 11:46:02,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:46:02,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-14 11:46:02,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:46:02,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-14 11:46:02,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1089, Unknown=0, NotChecked=0, Total=1190 [2023-02-14 11:46:02,442 INFO L87 Difference]: Start difference. First operand 616 states and 694 transitions. Second operand has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 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) [2023-02-14 11:46:04,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:46:04,591 INFO L93 Difference]: Finished difference Result 816 states and 910 transitions. [2023-02-14 11:46:04,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-14 11:46:04,591 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 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 42 [2023-02-14 11:46:04,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:46:04,593 INFO L225 Difference]: With dead ends: 816 [2023-02-14 11:46:04,593 INFO L226 Difference]: Without dead ends: 753 [2023-02-14 11:46:04,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1040, Invalid=3790, Unknown=0, NotChecked=0, Total=4830 [2023-02-14 11:46:04,594 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 1185 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1185 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:46:04,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1185 Valid, 895 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 11:46:04,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2023-02-14 11:46:05,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 681. [2023-02-14 11:46:05,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 1.1147058823529412) internal successors, (758), 680 states have internal predecessors, (758), 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) [2023-02-14 11:46:05,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 758 transitions. [2023-02-14 11:46:05,304 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 758 transitions. Word has length 42 [2023-02-14 11:46:05,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:46:05,304 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 758 transitions. [2023-02-14 11:46:05,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 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) [2023-02-14 11:46:05,304 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 758 transitions. [2023-02-14 11:46:05,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-14 11:46:05,305 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:46:05,306 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:46:05,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2023-02-14 11:46:05,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:46:05,506 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:46:05,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:46:05,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1018615439, now seen corresponding path program 75 times [2023-02-14 11:46:05,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:46:05,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900627242] [2023-02-14 11:46:05,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:46:05,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:46:05,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:46:05,838 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-14 11:46:05,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:46:05,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900627242] [2023-02-14 11:46:05,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900627242] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:46:05,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796919048] [2023-02-14 11:46:05,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 11:46:05,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:46:05,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:46:05,839 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:46:05,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2023-02-14 11:46:05,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-14 11:46:05,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:46:05,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-14 11:46:05,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:46:06,330 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-14 11:46:06,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:46:06,513 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-14 11:46:06,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796919048] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:46:06,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:46:06,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 42 [2023-02-14 11:46:06,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11353882] [2023-02-14 11:46:06,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:46:06,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-14 11:46:06,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:46:06,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-14 11:46:06,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1606, Unknown=0, NotChecked=0, Total=1722 [2023-02-14 11:46:06,514 INFO L87 Difference]: Start difference. First operand 681 states and 758 transitions. Second operand has 42 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:46:08,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:46:08,284 INFO L93 Difference]: Finished difference Result 774 states and 854 transitions. [2023-02-14 11:46:08,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-14 11:46:08,285 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-02-14 11:46:08,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:46:08,287 INFO L225 Difference]: With dead ends: 774 [2023-02-14 11:46:08,287 INFO L226 Difference]: Without dead ends: 743 [2023-02-14 11:46:08,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=313, Invalid=3719, Unknown=0, NotChecked=0, Total=4032 [2023-02-14 11:46:08,287 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 140 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 11:46:08,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 1040 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 11:46:08,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2023-02-14 11:46:09,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 677. [2023-02-14 11:46:09,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 1.1168639053254439) internal successors, (755), 676 states have internal predecessors, (755), 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) [2023-02-14 11:46:09,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 755 transitions. [2023-02-14 11:46:09,013 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 755 transitions. Word has length 42 [2023-02-14 11:46:09,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:46:09,013 INFO L495 AbstractCegarLoop]: Abstraction has 677 states and 755 transitions. [2023-02-14 11:46:09,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:46:09,014 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 755 transitions. [2023-02-14 11:46:09,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-14 11:46:09,015 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:46:09,015 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:46:09,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2023-02-14 11:46:09,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:46:09,221 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:46:09,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:46:09,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1114544290, now seen corresponding path program 76 times [2023-02-14 11:46:09,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:46:09,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137029181] [2023-02-14 11:46:09,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:46:09,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:46:09,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:46:09,398 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-14 11:46:09,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:46:09,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137029181] [2023-02-14 11:46:09,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137029181] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:46:09,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997695943] [2023-02-14 11:46:09,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 11:46:09,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:46:09,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:46:09,400 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:46:09,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2023-02-14 11:46:09,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 11:46:09,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:46:09,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-14 11:46:09,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:46:09,698 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-14 11:46:09,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:46:09,938 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-14 11:46:09,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997695943] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:46:09,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:46:09,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 35 [2023-02-14 11:46:09,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205298606] [2023-02-14 11:46:09,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:46:09,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-14 11:46:09,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:46:09,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-14 11:46:09,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1089, Unknown=0, NotChecked=0, Total=1190 [2023-02-14 11:46:09,940 INFO L87 Difference]: Start difference. First operand 677 states and 755 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:46:11,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:46:11,616 INFO L93 Difference]: Finished difference Result 755 states and 828 transitions. [2023-02-14 11:46:11,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-14 11:46:11,616 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-02-14 11:46:11,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:46:11,618 INFO L225 Difference]: With dead ends: 755 [2023-02-14 11:46:11,618 INFO L226 Difference]: Without dead ends: 721 [2023-02-14 11:46:11,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=299, Invalid=2251, Unknown=0, NotChecked=0, Total=2550 [2023-02-14 11:46:11,619 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 916 mSDsluCounter, 2184 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 2289 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 11:46:11,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [916 Valid, 2289 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 11:46:11,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2023-02-14 11:46:12,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 677. [2023-02-14 11:46:12,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 1.1020710059171597) internal successors, (745), 676 states have internal predecessors, (745), 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) [2023-02-14 11:46:12,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 745 transitions. [2023-02-14 11:46:12,362 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 745 transitions. Word has length 42 [2023-02-14 11:46:12,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:46:12,362 INFO L495 AbstractCegarLoop]: Abstraction has 677 states and 745 transitions. [2023-02-14 11:46:12,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:46:12,363 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 745 transitions. [2023-02-14 11:46:12,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 11:46:12,365 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:46:12,365 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:46:12,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2023-02-14 11:46:12,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2023-02-14 11:46:12,575 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:46:12,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:46:12,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1950289367, now seen corresponding path program 77 times [2023-02-14 11:46:12,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:46:12,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127009128] [2023-02-14 11:46:12,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:46:12,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:46:12,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:46:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:46:12,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:46:12,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127009128] [2023-02-14 11:46:12,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127009128] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:46:12,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361212121] [2023-02-14 11:46:12,922 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 11:46:12,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:46:12,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:46:12,923 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:46:12,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2023-02-14 11:46:12,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-02-14 11:46:12,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:46:12,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-14 11:46:12,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:46:13,697 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:46:13,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:46:14,334 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:46:14,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361212121] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:46:14,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:46:14,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 59 [2023-02-14 11:46:14,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745759219] [2023-02-14 11:46:14,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:46:14,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-02-14 11:46:14,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:46:14,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-02-14 11:46:14,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=3259, Unknown=0, NotChecked=0, Total=3422 [2023-02-14 11:46:14,336 INFO L87 Difference]: Start difference. First operand 677 states and 745 transitions. Second operand has 59 states, 59 states have (on average 1.5084745762711864) internal successors, (89), 59 states have internal predecessors, (89), 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) [2023-02-14 11:46:21,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:46:21,785 INFO L93 Difference]: Finished difference Result 1173 states and 1259 transitions. [2023-02-14 11:46:21,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-02-14 11:46:21,786 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.5084745762711864) internal successors, (89), 59 states have internal predecessors, (89), 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 43 [2023-02-14 11:46:21,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:46:21,788 INFO L225 Difference]: With dead ends: 1173 [2023-02-14 11:46:21,788 INFO L226 Difference]: Without dead ends: 1125 [2023-02-14 11:46:21,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 41 SyntacticMatches, 11 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4522 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=4689, Invalid=18567, Unknown=0, NotChecked=0, Total=23256 [2023-02-14 11:46:21,789 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 3124 mSDsluCounter, 2185 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3124 SdHoareTripleChecker+Valid, 2287 SdHoareTripleChecker+Invalid, 1637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-14 11:46:21,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3124 Valid, 2287 Invalid, 1637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1566 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-14 11:46:21,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2023-02-14 11:46:22,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 743. [2023-02-14 11:46:22,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 1.101078167115903) internal successors, (817), 742 states have internal predecessors, (817), 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) [2023-02-14 11:46:22,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 817 transitions. [2023-02-14 11:46:22,610 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 817 transitions. Word has length 43 [2023-02-14 11:46:22,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:46:22,610 INFO L495 AbstractCegarLoop]: Abstraction has 743 states and 817 transitions. [2023-02-14 11:46:22,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.5084745762711864) internal successors, (89), 59 states have internal predecessors, (89), 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) [2023-02-14 11:46:22,611 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 817 transitions. [2023-02-14 11:46:22,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 11:46:22,612 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:46:22,612 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:46:22,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2023-02-14 11:46:22,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2023-02-14 11:46:22,817 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:46:22,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:46:22,818 INFO L85 PathProgramCache]: Analyzing trace with hash 345068246, now seen corresponding path program 78 times [2023-02-14 11:46:22,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:46:22,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287265561] [2023-02-14 11:46:22,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:46:22,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:46:22,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:46:23,182 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:46:23,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:46:23,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287265561] [2023-02-14 11:46:23,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287265561] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:46:23,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292888178] [2023-02-14 11:46:23,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 11:46:23,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:46:23,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:46:23,185 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:46:23,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2023-02-14 11:46:23,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-14 11:46:23,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:46:23,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-14 11:46:23,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:46:23,942 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:46:23,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:46:24,586 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:46:24,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292888178] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:46:24,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:46:24,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 59 [2023-02-14 11:46:24,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057825334] [2023-02-14 11:46:24,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:46:24,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-02-14 11:46:24,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:46:24,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-02-14 11:46:24,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=3260, Unknown=0, NotChecked=0, Total=3422 [2023-02-14 11:46:24,587 INFO L87 Difference]: Start difference. First operand 743 states and 817 transitions. Second operand has 59 states, 59 states have (on average 1.5084745762711864) internal successors, (89), 59 states have internal predecessors, (89), 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) [2023-02-14 11:46:28,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:46:28,923 INFO L93 Difference]: Finished difference Result 1155 states and 1235 transitions. [2023-02-14 11:46:28,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-14 11:46:28,923 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.5084745762711864) internal successors, (89), 59 states have internal predecessors, (89), 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 43 [2023-02-14 11:46:28,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:46:28,925 INFO L225 Difference]: With dead ends: 1155 [2023-02-14 11:46:28,925 INFO L226 Difference]: Without dead ends: 1131 [2023-02-14 11:46:28,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 41 SyntacticMatches, 11 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=651, Invalid=7181, Unknown=0, NotChecked=0, Total=7832 [2023-02-14 11:46:28,926 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 2433 mSDsluCounter, 5803 mSDsCounter, 0 mSdLazyCounter, 2048 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2433 SdHoareTripleChecker+Valid, 5983 SdHoareTripleChecker+Invalid, 2121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 2048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-14 11:46:28,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2433 Valid, 5983 Invalid, 2121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 2048 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-14 11:46:28,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2023-02-14 11:46:29,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 749. [2023-02-14 11:46:29,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 1.1002673796791445) internal successors, (823), 748 states have internal predecessors, (823), 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) [2023-02-14 11:46:29,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 823 transitions. [2023-02-14 11:46:29,787 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 823 transitions. Word has length 43 [2023-02-14 11:46:29,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:46:29,787 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 823 transitions. [2023-02-14 11:46:29,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.5084745762711864) internal successors, (89), 59 states have internal predecessors, (89), 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) [2023-02-14 11:46:29,787 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 823 transitions. [2023-02-14 11:46:29,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 11:46:29,788 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:46:29,788 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:46:29,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2023-02-14 11:46:29,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2023-02-14 11:46:29,989 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:46:29,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:46:29,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1718266860, now seen corresponding path program 79 times [2023-02-14 11:46:29,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:46:29,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294320119] [2023-02-14 11:46:29,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:46:29,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:46:29,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:46:30,094 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-14 11:46:30,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:46:30,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294320119] [2023-02-14 11:46:30,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294320119] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:46:30,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732424627] [2023-02-14 11:46:30,094 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 11:46:30,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:46:30,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:46:30,095 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:46:30,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2023-02-14 11:46:30,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:46:30,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 11:46:30,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:46:30,230 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-14 11:46:30,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:46:30,303 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-14 11:46:30,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732424627] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:46:30,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:46:30,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-02-14 11:46:30,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895802878] [2023-02-14 11:46:30,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:46:30,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-14 11:46:30,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:46:30,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-14 11:46:30,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2023-02-14 11:46:30,304 INFO L87 Difference]: Start difference. First operand 749 states and 823 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 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) [2023-02-14 11:46:31,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:46:31,406 INFO L93 Difference]: Finished difference Result 919 states and 1007 transitions. [2023-02-14 11:46:31,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-14 11:46:31,406 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 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 43 [2023-02-14 11:46:31,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:46:31,408 INFO L225 Difference]: With dead ends: 919 [2023-02-14 11:46:31,408 INFO L226 Difference]: Without dead ends: 779 [2023-02-14 11:46:31,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 66 SyntacticMatches, 12 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=487, Invalid=919, Unknown=0, NotChecked=0, Total=1406 [2023-02-14 11:46:31,409 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 197 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:46:31,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 337 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:46:31,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2023-02-14 11:46:32,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 735. [2023-02-14 11:46:32,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 1.0967302452316077) internal successors, (805), 734 states have internal predecessors, (805), 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) [2023-02-14 11:46:32,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 805 transitions. [2023-02-14 11:46:32,255 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 805 transitions. Word has length 43 [2023-02-14 11:46:32,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:46:32,255 INFO L495 AbstractCegarLoop]: Abstraction has 735 states and 805 transitions. [2023-02-14 11:46:32,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 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) [2023-02-14 11:46:32,255 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 805 transitions. [2023-02-14 11:46:32,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 11:46:32,256 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:46:32,256 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:46:32,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2023-02-14 11:46:32,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2023-02-14 11:46:32,456 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:46:32,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:46:32,457 INFO L85 PathProgramCache]: Analyzing trace with hash -2059418347, now seen corresponding path program 80 times [2023-02-14 11:46:32,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:46:32,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120079159] [2023-02-14 11:46:32,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:46:32,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:46:32,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:46:32,558 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-14 11:46:32,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:46:32,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120079159] [2023-02-14 11:46:32,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120079159] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:46:32,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313119871] [2023-02-14 11:46:32,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 11:46:32,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:46:32,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:46:32,559 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:46:32,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2023-02-14 11:46:32,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:46:32,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:46:32,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 11:46:32,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:46:32,687 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-14 11:46:32,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:46:32,759 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-14 11:46:32,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313119871] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:46:32,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:46:32,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-02-14 11:46:32,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173003218] [2023-02-14 11:46:32,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:46:32,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-14 11:46:32,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:46:32,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-14 11:46:32,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2023-02-14 11:46:32,761 INFO L87 Difference]: Start difference. First operand 735 states and 805 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 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) [2023-02-14 11:46:33,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:46:33,900 INFO L93 Difference]: Finished difference Result 786 states and 851 transitions. [2023-02-14 11:46:33,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-14 11:46:33,900 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 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 43 [2023-02-14 11:46:33,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:46:33,901 INFO L225 Difference]: With dead ends: 786 [2023-02-14 11:46:33,901 INFO L226 Difference]: Without dead ends: 780 [2023-02-14 11:46:33,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 66 SyntacticMatches, 12 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=487, Invalid=919, Unknown=0, NotChecked=0, Total=1406 [2023-02-14 11:46:33,901 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 80 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:46:33,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 390 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:46:33,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2023-02-14 11:46:34,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 736. [2023-02-14 11:46:34,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 1.0965986394557823) internal successors, (806), 735 states have internal predecessors, (806), 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) [2023-02-14 11:46:34,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 806 transitions. [2023-02-14 11:46:34,766 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 806 transitions. Word has length 43 [2023-02-14 11:46:34,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:46:34,766 INFO L495 AbstractCegarLoop]: Abstraction has 736 states and 806 transitions. [2023-02-14 11:46:34,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 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) [2023-02-14 11:46:34,766 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 806 transitions. [2023-02-14 11:46:34,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-14 11:46:34,767 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:46:34,767 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:46:34,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2023-02-14 11:46:34,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:46:34,968 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:46:34,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:46:34,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1525148816, now seen corresponding path program 81 times [2023-02-14 11:46:34,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:46:34,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396736435] [2023-02-14 11:46:34,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:46:34,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:46:34,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:46:35,540 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:46:35,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:46:35,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396736435] [2023-02-14 11:46:35,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396736435] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:46:35,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920527056] [2023-02-14 11:46:35,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 11:46:35,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:46:35,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:46:35,543 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:46:35,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2023-02-14 11:46:35,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-02-14 11:46:35,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:46:35,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-14 11:46:35,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:46:36,139 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:46:36,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:46:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 11:46:36,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920527056] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:46:36,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:46:36,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 53 [2023-02-14 11:46:36,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499416274] [2023-02-14 11:46:36,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:46:36,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-14 11:46:36,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:46:36,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-14 11:46:36,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2629, Unknown=0, NotChecked=0, Total=2756 [2023-02-14 11:46:36,376 INFO L87 Difference]: Start difference. First operand 736 states and 806 transitions. Second operand has 53 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 53 states have internal predecessors, (71), 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) [2023-02-14 11:46:40,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:46:40,491 INFO L93 Difference]: Finished difference Result 1317 states and 1400 transitions. [2023-02-14 11:46:40,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-14 11:46:40,492 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 53 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-02-14 11:46:40,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:46:40,493 INFO L225 Difference]: With dead ends: 1317 [2023-02-14 11:46:40,493 INFO L226 Difference]: Without dead ends: 1308 [2023-02-14 11:46:40,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 65 SyntacticMatches, 4 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1294 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=378, Invalid=6932, Unknown=0, NotChecked=0, Total=7310 [2023-02-14 11:46:40,494 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 374 mSDsluCounter, 6304 mSDsCounter, 0 mSdLazyCounter, 2802 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 6489 SdHoareTripleChecker+Invalid, 2803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-14 11:46:40,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 6489 Invalid, 2803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2802 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-14 11:46:40,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2023-02-14 11:46:41,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 745. [2023-02-14 11:46:41,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 1.096774193548387) internal successors, (816), 744 states have internal predecessors, (816), 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) [2023-02-14 11:46:41,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 816 transitions. [2023-02-14 11:46:41,330 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 816 transitions. Word has length 44 [2023-02-14 11:46:41,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:46:41,331 INFO L495 AbstractCegarLoop]: Abstraction has 745 states and 816 transitions. [2023-02-14 11:46:41,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 53 states have internal predecessors, (71), 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) [2023-02-14 11:46:41,331 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 816 transitions. [2023-02-14 11:46:41,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-14 11:46:41,332 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:46:41,332 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:46:41,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2023-02-14 11:46:41,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:46:41,538 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:46:41,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:46:41,538 INFO L85 PathProgramCache]: Analyzing trace with hash 39040176, now seen corresponding path program 82 times [2023-02-14 11:46:41,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:46:41,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469918142] [2023-02-14 11:46:41,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:46:41,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:46:41,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:46:42,069 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 11:46:42,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:46:42,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469918142] [2023-02-14 11:46:42,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469918142] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:46:42,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107803766] [2023-02-14 11:46:42,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 11:46:42,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:46:42,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:46:42,072 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:46:42,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2023-02-14 11:46:42,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 11:46:42,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:46:42,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-14 11:46:42,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:46:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 11:46:42,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:46:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 11:46:42,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107803766] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:46:42,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:46:42,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 51 [2023-02-14 11:46:42,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641086776] [2023-02-14 11:46:42,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:46:42,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-02-14 11:46:42,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:46:42,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-02-14 11:46:42,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2424, Unknown=0, NotChecked=0, Total=2550 [2023-02-14 11:46:42,875 INFO L87 Difference]: Start difference. First operand 745 states and 816 transitions. Second operand has 51 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 51 states have internal predecessors, (70), 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) [2023-02-14 11:46:46,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:46:46,596 INFO L93 Difference]: Finished difference Result 1118 states and 1188 transitions. [2023-02-14 11:46:46,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-14 11:46:46,597 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 51 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-02-14 11:46:46,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:46:46,598 INFO L225 Difference]: With dead ends: 1118 [2023-02-14 11:46:46,598 INFO L226 Difference]: Without dead ends: 1089 [2023-02-14 11:46:46,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=349, Invalid=6131, Unknown=0, NotChecked=0, Total=6480 [2023-02-14 11:46:46,599 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 286 mSDsluCounter, 5235 mSDsCounter, 0 mSdLazyCounter, 2561 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 5392 SdHoareTripleChecker+Invalid, 2562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-14 11:46:46,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 5392 Invalid, 2562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2561 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-14 11:46:46,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2023-02-14 11:46:47,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 736. [2023-02-14 11:46:47,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 1.0965986394557823) internal successors, (806), 735 states have internal predecessors, (806), 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) [2023-02-14 11:46:47,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 806 transitions. [2023-02-14 11:46:47,436 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 806 transitions. Word has length 44 [2023-02-14 11:46:47,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:46:47,437 INFO L495 AbstractCegarLoop]: Abstraction has 736 states and 806 transitions. [2023-02-14 11:46:47,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 51 states have internal predecessors, (70), 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) [2023-02-14 11:46:47,437 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 806 transitions. [2023-02-14 11:46:47,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-14 11:46:47,438 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:46:47,438 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:46:47,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2023-02-14 11:46:47,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:46:47,638 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:46:47,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:46:47,639 INFO L85 PathProgramCache]: Analyzing trace with hash 888591216, now seen corresponding path program 83 times [2023-02-14 11:46:47,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:46:47,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916933769] [2023-02-14 11:46:47,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:46:47,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:46:47,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:46:48,107 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 11:46:48,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:46:48,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916933769] [2023-02-14 11:46:48,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916933769] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:46:48,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600283476] [2023-02-14 11:46:48,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 11:46:48,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:46:48,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:46:48,109 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:46:48,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2023-02-14 11:46:48,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-14 11:46:48,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:46:48,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-14 11:46:48,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:46:48,693 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 11:46:48,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:46:48,903 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 11:46:48,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600283476] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:46:48,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:46:48,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 49 [2023-02-14 11:46:48,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413094341] [2023-02-14 11:46:48,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:46:48,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-14 11:46:48,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:46:48,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-14 11:46:48,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2227, Unknown=0, NotChecked=0, Total=2352 [2023-02-14 11:46:48,904 INFO L87 Difference]: Start difference. First operand 736 states and 806 transitions. Second operand has 49 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 states have internal predecessors, (68), 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) [2023-02-14 11:46:51,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:46:51,912 INFO L93 Difference]: Finished difference Result 977 states and 1046 transitions. [2023-02-14 11:46:51,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-14 11:46:51,912 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-02-14 11:46:51,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:46:51,913 INFO L225 Difference]: With dead ends: 977 [2023-02-14 11:46:51,913 INFO L226 Difference]: Without dead ends: 947 [2023-02-14 11:46:51,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=343, Invalid=5509, Unknown=0, NotChecked=0, Total=5852 [2023-02-14 11:46:51,914 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 236 mSDsluCounter, 3630 mSDsCounter, 0 mSdLazyCounter, 1890 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 3753 SdHoareTripleChecker+Invalid, 1891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-14 11:46:51,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 3753 Invalid, 1891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1890 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-14 11:46:51,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2023-02-14 11:46:52,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 725. [2023-02-14 11:46:52,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 724 states have (on average 1.0966850828729282) internal successors, (794), 724 states have internal predecessors, (794), 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) [2023-02-14 11:46:52,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 794 transitions. [2023-02-14 11:46:52,726 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 794 transitions. Word has length 44 [2023-02-14 11:46:52,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:46:52,726 INFO L495 AbstractCegarLoop]: Abstraction has 725 states and 794 transitions. [2023-02-14 11:46:52,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 states have internal predecessors, (68), 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) [2023-02-14 11:46:52,727 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 794 transitions. [2023-02-14 11:46:52,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-14 11:46:52,727 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:46:52,727 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:46:52,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2023-02-14 11:46:52,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:46:52,928 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:46:52,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:46:52,928 INFO L85 PathProgramCache]: Analyzing trace with hash -359009104, now seen corresponding path program 84 times [2023-02-14 11:46:52,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:46:52,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005314058] [2023-02-14 11:46:52,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:46:52,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:46:52,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:46:53,375 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-14 11:46:53,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:46:53,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005314058] [2023-02-14 11:46:53,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005314058] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:46:53,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634811802] [2023-02-14 11:46:53,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 11:46:53,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:46:53,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:46:53,377 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:46:53,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2023-02-14 11:46:53,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-14 11:46:53,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:46:53,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-14 11:46:53,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:46:53,944 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-14 11:46:53,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:46:54,146 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-14 11:46:54,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634811802] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:46:54,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:46:54,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 47 [2023-02-14 11:46:54,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231748697] [2023-02-14 11:46:54,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:46:54,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-14 11:46:54,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:46:54,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-14 11:46:54,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=2038, Unknown=0, NotChecked=0, Total=2162 [2023-02-14 11:46:54,147 INFO L87 Difference]: Start difference. First operand 725 states and 794 transitions. Second operand has 47 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 47 states have internal predecessors, (66), 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) [2023-02-14 11:46:56,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:46:56,639 INFO L93 Difference]: Finished difference Result 869 states and 937 transitions. [2023-02-14 11:46:56,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-14 11:46:56,640 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 47 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-02-14 11:46:56,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:46:56,641 INFO L225 Difference]: With dead ends: 869 [2023-02-14 11:46:56,641 INFO L226 Difference]: Without dead ends: 838 [2023-02-14 11:46:56,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=337, Invalid=4919, Unknown=0, NotChecked=0, Total=5256 [2023-02-14 11:46:56,642 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 192 mSDsluCounter, 2588 mSDsCounter, 0 mSdLazyCounter, 1540 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 2677 SdHoareTripleChecker+Invalid, 1541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 11:46:56,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 2677 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1540 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 11:46:56,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2023-02-14 11:46:57,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 712. [2023-02-14 11:46:57,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 1.0970464135021096) internal successors, (780), 711 states have internal predecessors, (780), 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) [2023-02-14 11:46:57,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 780 transitions. [2023-02-14 11:46:57,432 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 780 transitions. Word has length 44 [2023-02-14 11:46:57,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:46:57,432 INFO L495 AbstractCegarLoop]: Abstraction has 712 states and 780 transitions. [2023-02-14 11:46:57,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 47 states have internal predecessors, (66), 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) [2023-02-14 11:46:57,432 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 780 transitions. [2023-02-14 11:46:57,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-14 11:46:57,433 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:46:57,433 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:46:57,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2023-02-14 11:46:57,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:46:57,634 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:46:57,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:46:57,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1685351568, now seen corresponding path program 85 times [2023-02-14 11:46:57,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:46:57,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483533852] [2023-02-14 11:46:57,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:46:57,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:46:57,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:46:58,029 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-14 11:46:58,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:46:58,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483533852] [2023-02-14 11:46:58,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483533852] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:46:58,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230252582] [2023-02-14 11:46:58,029 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 11:46:58,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:46:58,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:46:58,030 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:46:58,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2023-02-14 11:46:58,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:46:58,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 54 conjunts are in the unsatisfiable core [2023-02-14 11:46:58,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:46:58,571 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-14 11:46:58,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:46:58,763 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-14 11:46:58,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230252582] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:46:58,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:46:58,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 45 [2023-02-14 11:46:58,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579108118] [2023-02-14 11:46:58,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:46:58,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-14 11:46:58,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:46:58,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-14 11:46:58,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1857, Unknown=0, NotChecked=0, Total=1980 [2023-02-14 11:46:58,765 INFO L87 Difference]: Start difference. First operand 712 states and 780 transitions. Second operand has 45 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 45 states have internal predecessors, (64), 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) [2023-02-14 11:47:00,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:47:00,609 INFO L93 Difference]: Finished difference Result 780 states and 847 transitions. [2023-02-14 11:47:00,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-14 11:47:00,609 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 45 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-02-14 11:47:00,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:47:00,610 INFO L225 Difference]: With dead ends: 780 [2023-02-14 11:47:00,610 INFO L226 Difference]: Without dead ends: 748 [2023-02-14 11:47:00,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=331, Invalid=4361, Unknown=0, NotChecked=0, Total=4692 [2023-02-14 11:47:00,611 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 147 mSDsluCounter, 1320 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 1375 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 11:47:00,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 1375 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 11:47:00,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2023-02-14 11:47:01,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 697. [2023-02-14 11:47:01,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 1.0977011494252873) internal successors, (764), 696 states have internal predecessors, (764), 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) [2023-02-14 11:47:01,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 764 transitions. [2023-02-14 11:47:01,391 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 764 transitions. Word has length 44 [2023-02-14 11:47:01,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:47:01,391 INFO L495 AbstractCegarLoop]: Abstraction has 697 states and 764 transitions. [2023-02-14 11:47:01,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 45 states have internal predecessors, (64), 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) [2023-02-14 11:47:01,391 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 764 transitions. [2023-02-14 11:47:01,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-14 11:47:01,392 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:47:01,392 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:47:01,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2023-02-14 11:47:01,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2023-02-14 11:47:01,593 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:47:01,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:47:01,593 INFO L85 PathProgramCache]: Analyzing trace with hash -2111163216, now seen corresponding path program 86 times [2023-02-14 11:47:01,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:47:01,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785072537] [2023-02-14 11:47:01,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:47:01,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:47:01,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:47:01,939 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-14 11:47:01,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:47:01,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785072537] [2023-02-14 11:47:01,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785072537] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:47:01,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143262241] [2023-02-14 11:47:01,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 11:47:01,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:47:01,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:47:01,941 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:47:01,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2023-02-14 11:47:01,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:47:01,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:47:01,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-14 11:47:01,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:47:02,464 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-14 11:47:02,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:47:02,646 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-14 11:47:02,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143262241] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:47:02,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:47:02,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 43 [2023-02-14 11:47:02,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42769451] [2023-02-14 11:47:02,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:47:02,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-14 11:47:02,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:47:02,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-14 11:47:02,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2023-02-14 11:47:02,648 INFO L87 Difference]: Start difference. First operand 697 states and 764 transitions. Second operand has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 43 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:47:04,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:47:04,228 INFO L93 Difference]: Finished difference Result 746 states and 815 transitions. [2023-02-14 11:47:04,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-14 11:47:04,228 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 43 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-02-14 11:47:04,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:47:04,229 INFO L225 Difference]: With dead ends: 746 [2023-02-14 11:47:04,229 INFO L226 Difference]: Without dead ends: 740 [2023-02-14 11:47:04,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=325, Invalid=3835, Unknown=0, NotChecked=0, Total=4160 [2023-02-14 11:47:04,230 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 126 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 11:47:04,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 637 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 11:47:04,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2023-02-14 11:47:05,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 711. [2023-02-14 11:47:05,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 710 states have (on average 1.0985915492957747) internal successors, (780), 710 states have internal predecessors, (780), 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) [2023-02-14 11:47:05,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 780 transitions. [2023-02-14 11:47:05,042 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 780 transitions. Word has length 44 [2023-02-14 11:47:05,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:47:05,042 INFO L495 AbstractCegarLoop]: Abstraction has 711 states and 780 transitions. [2023-02-14 11:47:05,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.441860465116279) internal successors, (62), 43 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 11:47:05,042 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 780 transitions. [2023-02-14 11:47:05,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-14 11:47:05,043 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:47:05,043 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:47:05,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2023-02-14 11:47:05,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2023-02-14 11:47:05,244 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:47:05,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:47:05,244 INFO L85 PathProgramCache]: Analyzing trace with hash 627664406, now seen corresponding path program 87 times [2023-02-14 11:47:05,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:47:05,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036236891] [2023-02-14 11:47:05,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:47:05,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:47:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:47:05,642 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:47:05,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:47:05,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036236891] [2023-02-14 11:47:05,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036236891] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:47:05,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599699635] [2023-02-14 11:47:05,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 11:47:05,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:47:05,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:47:05,644 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:47:05,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2023-02-14 11:47:05,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-02-14 11:47:05,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:47:05,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-14 11:47:05,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:47:06,507 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:47:06,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:47:07,248 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 11:47:07,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599699635] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:47:07,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:47:07,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 64 [2023-02-14 11:47:07,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925758472] [2023-02-14 11:47:07,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:47:07,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-14 11:47:07,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:47:07,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-14 11:47:07,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=3855, Unknown=0, NotChecked=0, Total=4032 [2023-02-14 11:47:07,250 INFO L87 Difference]: Start difference. First operand 711 states and 780 transitions. Second operand has 64 states, 64 states have (on average 1.46875) internal successors, (94), 64 states have internal predecessors, (94), 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)