./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.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/bitvector/soft_float_3a.c.cil.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 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3dbbec3 [2023-02-14 10:48:53,138 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 10:48:53,140 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 10:48:53,184 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 10:48:53,185 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 10:48:53,188 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 10:48:53,190 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 10:48:53,194 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 10:48:53,197 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 10:48:53,201 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 10:48:53,203 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 10:48:53,204 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 10:48:53,205 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 10:48:53,207 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 10:48:53,208 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 10:48:53,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 10:48:53,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 10:48:53,212 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 10:48:53,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 10:48:53,218 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 10:48:53,220 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 10:48:53,221 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 10:48:53,222 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 10:48:53,223 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 10:48:53,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 10:48:53,229 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 10:48:53,229 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 10:48:53,231 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 10:48:53,231 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 10:48:53,233 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 10:48:53,233 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 10:48:53,234 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 10:48:53,235 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 10:48:53,236 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 10:48:53,237 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 10:48:53,237 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 10:48:53,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 10:48:53,238 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 10:48:53,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 10:48:53,239 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 10:48:53,240 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 10:48:53,242 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 10:48:53,273 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 10:48:53,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 10:48:53,274 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 10:48:53,274 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 10:48:53,275 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 10:48:53,275 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 10:48:53,276 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 10:48:53,276 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 10:48:53,276 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 10:48:53,276 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 10:48:53,277 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 10:48:53,277 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 10:48:53,278 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 10:48:53,278 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 10:48:53,278 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 10:48:53,278 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 10:48:53,278 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 10:48:53,278 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 10:48:53,279 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 10:48:53,279 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 10:48:53,279 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 10:48:53,279 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 10:48:53,280 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 10:48:53,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 10:48:53,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 10:48:53,280 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 10:48:53,280 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 10:48:53,281 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 10:48:53,281 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 10:48:53,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 10:48:53,281 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 10:48:53,281 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 10:48:53,282 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 10:48:53,282 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 10:48:53,282 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 10:48:53,282 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 [2023-02-14 10:48:53,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 10:48:53,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 10:48:53,546 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 10:48:53,547 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 10:48:53,550 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 10:48:53,551 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2023-02-14 10:48:54,663 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 10:48:54,876 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 10:48:54,877 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2023-02-14 10:48:54,883 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c85d9f503/8d58ce8f208a4c6092fa2a4a457d7836/FLAG674bd2f16 [2023-02-14 10:48:54,899 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c85d9f503/8d58ce8f208a4c6092fa2a4a457d7836 [2023-02-14 10:48:54,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 10:48:54,904 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 10:48:54,907 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 10:48:54,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 10:48:54,911 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 10:48:54,912 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:48:54" (1/1) ... [2023-02-14 10:48:54,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f40d550 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:48:54, skipping insertion in model container [2023-02-14 10:48:54,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:48:54" (1/1) ... [2023-02-14 10:48:54,920 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 10:48:54,956 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 10:48:55,099 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/bitvector/soft_float_3a.c.cil.c[728,741] [2023-02-14 10:48:55,141 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 10:48:55,151 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 10:48:55,162 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/bitvector/soft_float_3a.c.cil.c[728,741] [2023-02-14 10:48:55,195 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 10:48:55,207 INFO L208 MainTranslator]: Completed translation [2023-02-14 10:48:55,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:48:55 WrapperNode [2023-02-14 10:48:55,207 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 10:48:55,208 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 10:48:55,209 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 10:48:55,209 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 10:48:55,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:48:55" (1/1) ... [2023-02-14 10:48:55,225 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:48:55" (1/1) ... [2023-02-14 10:48:55,261 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 166 [2023-02-14 10:48:55,261 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 10:48:55,262 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 10:48:55,262 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 10:48:55,262 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 10:48:55,271 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:48:55" (1/1) ... [2023-02-14 10:48:55,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:48:55" (1/1) ... [2023-02-14 10:48:55,273 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:48:55" (1/1) ... [2023-02-14 10:48:55,274 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:48:55" (1/1) ... [2023-02-14 10:48:55,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:48:55" (1/1) ... [2023-02-14 10:48:55,284 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:48:55" (1/1) ... [2023-02-14 10:48:55,286 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:48:55" (1/1) ... [2023-02-14 10:48:55,288 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:48:55" (1/1) ... [2023-02-14 10:48:55,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 10:48:55,291 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 10:48:55,291 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 10:48:55,291 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 10:48:55,292 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:48:55" (1/1) ... [2023-02-14 10:48:55,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 10:48:55,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:48:55,328 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 10:48:55,331 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 10:48:55,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 10:48:55,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 10:48:55,358 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-02-14 10:48:55,359 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-02-14 10:48:55,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 10:48:55,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 10:48:55,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-14 10:48:55,364 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-14 10:48:55,426 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 10:48:55,428 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 10:48:55,849 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 10:48:55,855 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 10:48:55,855 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-14 10:48:55,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:48:55 BoogieIcfgContainer [2023-02-14 10:48:55,856 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 10:48:55,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 10:48:55,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 10:48:55,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 10:48:55,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 10:48:54" (1/3) ... [2023-02-14 10:48:55,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1576d745 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:48:55, skipping insertion in model container [2023-02-14 10:48:55,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:48:55" (2/3) ... [2023-02-14 10:48:55,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1576d745 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:48:55, skipping insertion in model container [2023-02-14 10:48:55,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:48:55" (3/3) ... [2023-02-14 10:48:55,867 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_3a.c.cil.c [2023-02-14 10:48:55,897 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 10:48:55,898 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 10:48:55,941 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 10:48:55,947 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;@2b8fa01f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 10:48:55,947 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 10:48:55,951 INFO L276 IsEmpty]: Start isEmpty. Operand has 74 states, 65 states have (on average 1.6153846153846154) internal successors, (105), 67 states have internal predecessors, (105), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 10:48:55,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-14 10:48:55,961 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:48:55,962 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, 1, 1, 1, 1, 1] [2023-02-14 10:48:55,964 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:48:55,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:48:55,968 INFO L85 PathProgramCache]: Analyzing trace with hash -674615112, now seen corresponding path program 1 times [2023-02-14 10:48:55,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:48:55,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400025878] [2023-02-14 10:48:55,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:48:55,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:48:56,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:56,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:48:56,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:56,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:48:56,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:56,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 10:48:56,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:56,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 10:48:56,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:56,271 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-14 10:48:56,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:48:56,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400025878] [2023-02-14 10:48:56,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400025878] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:48:56,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:48:56,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 10:48:56,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266688253] [2023-02-14 10:48:56,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:48:56,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 10:48:56,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:48:56,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 10:48:56,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 10:48:56,324 INFO L87 Difference]: Start difference. First operand has 74 states, 65 states have (on average 1.6153846153846154) internal successors, (105), 67 states have internal predecessors, (105), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 10:48:56,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:48:56,390 INFO L93 Difference]: Finished difference Result 150 states and 236 transitions. [2023-02-14 10:48:56,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 10:48:56,394 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2023-02-14 10:48:56,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:48:56,402 INFO L225 Difference]: With dead ends: 150 [2023-02-14 10:48:56,403 INFO L226 Difference]: Without dead ends: 68 [2023-02-14 10:48:56,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 10:48:56,410 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 4 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 210 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 10:48:56,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 210 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:48:56,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-02-14 10:48:56,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-02-14 10:48:56,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 61 states have internal predecessors, (91), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-14 10:48:56,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 100 transitions. [2023-02-14 10:48:56,458 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 100 transitions. Word has length 41 [2023-02-14 10:48:56,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:48:56,460 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 100 transitions. [2023-02-14 10:48:56,461 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 10:48:56,461 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 100 transitions. [2023-02-14 10:48:56,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 10:48:56,465 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:48:56,466 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, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:48:56,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 10:48:56,468 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:48:56,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:48:56,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1043963262, now seen corresponding path program 1 times [2023-02-14 10:48:56,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:48:56,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102086762] [2023-02-14 10:48:56,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:48:56,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:48:56,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:56,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:48:56,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:56,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:48:56,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:56,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 10:48:56,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:56,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 10:48:56,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:56,658 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-14 10:48:56,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:48:56,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102086762] [2023-02-14 10:48:56,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102086762] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:48:56,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:48:56,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 10:48:56,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212440413] [2023-02-14 10:48:56,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:48:56,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 10:48:56,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:48:56,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 10:48:56,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 10:48:56,663 INFO L87 Difference]: Start difference. First operand 68 states and 100 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 10:48:56,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:48:56,691 INFO L93 Difference]: Finished difference Result 78 states and 111 transitions. [2023-02-14 10:48:56,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 10:48:56,692 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2023-02-14 10:48:56,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:48:56,693 INFO L225 Difference]: With dead ends: 78 [2023-02-14 10:48:56,694 INFO L226 Difference]: Without dead ends: 68 [2023-02-14 10:48:56,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 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 10:48:56,695 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 1 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:48:56,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 292 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:48:56,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-02-14 10:48:56,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-02-14 10:48:56,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 61 states have (on average 1.4754098360655739) internal successors, (90), 61 states have internal predecessors, (90), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-14 10:48:56,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 99 transitions. [2023-02-14 10:48:56,703 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 99 transitions. Word has length 43 [2023-02-14 10:48:56,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:48:56,703 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 99 transitions. [2023-02-14 10:48:56,703 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 10:48:56,704 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 99 transitions. [2023-02-14 10:48:56,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 10:48:56,705 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:48:56,705 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, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:48:56,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 10:48:56,706 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:48:56,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:48:56,706 INFO L85 PathProgramCache]: Analyzing trace with hash 234616636, now seen corresponding path program 1 times [2023-02-14 10:48:56,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:48:56,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927265821] [2023-02-14 10:48:56,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:48:56,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:48:56,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:56,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:48:56,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:56,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:48:56,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:56,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 10:48:56,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:56,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 10:48:56,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:56,896 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 10:48:56,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:48:56,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927265821] [2023-02-14 10:48:56,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927265821] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:48:56,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351647481] [2023-02-14 10:48:56,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:48:56,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:48:56,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:48:56,901 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 10:48:56,927 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 10:48:56,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:56,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-14 10:48:57,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:48:57,101 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 10:48:57,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:48:57,263 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-14 10:48:57,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351647481] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 10:48:57,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:48:57,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 8] total 14 [2023-02-14 10:48:57,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150267849] [2023-02-14 10:48:57,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:48:57,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 10:48:57,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:48:57,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 10:48:57,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-02-14 10:48:57,270 INFO L87 Difference]: Start difference. First operand 68 states and 99 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 10:48:57,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:48:57,359 INFO L93 Difference]: Finished difference Result 139 states and 204 transitions. [2023-02-14 10:48:57,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 10:48:57,361 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2023-02-14 10:48:57,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:48:57,364 INFO L225 Difference]: With dead ends: 139 [2023-02-14 10:48:57,365 INFO L226 Difference]: Without dead ends: 100 [2023-02-14 10:48:57,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-02-14 10:48:57,366 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 41 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:48:57,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 454 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:48:57,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-14 10:48:57,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 74. [2023-02-14 10:48:57,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 66 states have (on average 1.4393939393939394) internal successors, (95), 66 states have internal predecessors, (95), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-14 10:48:57,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 108 transitions. [2023-02-14 10:48:57,376 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 108 transitions. Word has length 43 [2023-02-14 10:48:57,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:48:57,376 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 108 transitions. [2023-02-14 10:48:57,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 10:48:57,377 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 108 transitions. [2023-02-14 10:48:57,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 10:48:57,378 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:48:57,378 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, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:48:57,389 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 10:48:57,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:48:57,589 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:48:57,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:48:57,589 INFO L85 PathProgramCache]: Analyzing trace with hash -352189378, now seen corresponding path program 1 times [2023-02-14 10:48:57,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:48:57,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758240298] [2023-02-14 10:48:57,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:48:57,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:48:57,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:57,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:48:57,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:57,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:48:57,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:57,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 10:48:57,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:57,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 10:48:57,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:57,668 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 10:48:57,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:48:57,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758240298] [2023-02-14 10:48:57,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758240298] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:48:57,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350966124] [2023-02-14 10:48:57,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:48:57,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:48:57,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:48:57,671 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 10:48:57,696 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 10:48:57,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:57,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 10:48:57,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:48:57,819 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 10:48:57,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:48:57,938 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-14 10:48:57,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350966124] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:48:57,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:48:57,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 6] total 14 [2023-02-14 10:48:57,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341344880] [2023-02-14 10:48:57,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:48:57,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 10:48:57,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:48:57,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 10:48:57,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-02-14 10:48:57,949 INFO L87 Difference]: Start difference. First operand 74 states and 108 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-14 10:48:58,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:48:58,230 INFO L93 Difference]: Finished difference Result 215 states and 325 transitions. [2023-02-14 10:48:58,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-14 10:48:58,232 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 43 [2023-02-14 10:48:58,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:48:58,236 INFO L225 Difference]: With dead ends: 215 [2023-02-14 10:48:58,240 INFO L226 Difference]: Without dead ends: 144 [2023-02-14 10:48:58,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2023-02-14 10:48:58,245 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 164 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 10:48:58,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 737 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 10:48:58,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-02-14 10:48:58,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 127. [2023-02-14 10:48:58,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 116 states have (on average 1.4310344827586208) internal successors, (166), 115 states have internal predecessors, (166), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (15), 8 states have call predecessors, (15), 5 states have call successors, (15) [2023-02-14 10:48:58,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 187 transitions. [2023-02-14 10:48:58,270 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 187 transitions. Word has length 43 [2023-02-14 10:48:58,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:48:58,272 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 187 transitions. [2023-02-14 10:48:58,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-14 10:48:58,276 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 187 transitions. [2023-02-14 10:48:58,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-14 10:48:58,279 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:48:58,279 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:48:58,287 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 10:48:58,485 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,SelfDestructingSolverStorable3 [2023-02-14 10:48:58,485 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:48:58,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:48:58,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1940694518, now seen corresponding path program 1 times [2023-02-14 10:48:58,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:48:58,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704306708] [2023-02-14 10:48:58,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:48:58,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:48:58,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:58,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:48:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:58,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:48:58,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:58,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-14 10:48:58,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:58,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-14 10:48:58,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:58,580 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 10:48:58,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:48:58,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704306708] [2023-02-14 10:48:58,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704306708] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:48:58,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624581508] [2023-02-14 10:48:58,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:48:58,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:48:58,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:48:58,582 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 10:48:58,585 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 10:48:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:58,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-14 10:48:58,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:48:58,663 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 10:48:58,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 10:48:58,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624581508] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:48:58,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 10:48:58,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-02-14 10:48:58,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652250331] [2023-02-14 10:48:58,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:48:58,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 10:48:58,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:48:58,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 10:48:58,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-14 10:48:58,666 INFO L87 Difference]: Start difference. First operand 127 states and 187 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 10:48:58,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:48:58,708 INFO L93 Difference]: Finished difference Result 256 states and 379 transitions. [2023-02-14 10:48:58,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 10:48:58,708 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2023-02-14 10:48:58,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:48:58,710 INFO L225 Difference]: With dead ends: 256 [2023-02-14 10:48:58,710 INFO L226 Difference]: Without dead ends: 136 [2023-02-14 10:48:58,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-14 10:48:58,711 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 20 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:48:58,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 252 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:48:58,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-14 10:48:58,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2023-02-14 10:48:58,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 120 states have (on average 1.425) internal successors, (171), 120 states have internal predecessors, (171), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2023-02-14 10:48:58,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 195 transitions. [2023-02-14 10:48:58,723 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 195 transitions. Word has length 48 [2023-02-14 10:48:58,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:48:58,723 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 195 transitions. [2023-02-14 10:48:58,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 10:48:58,724 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 195 transitions. [2023-02-14 10:48:58,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-14 10:48:58,725 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:48:58,725 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:48:58,737 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 10:48:58,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:48:58,933 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:48:58,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:48:58,934 INFO L85 PathProgramCache]: Analyzing trace with hash -740139086, now seen corresponding path program 1 times [2023-02-14 10:48:58,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:48:58,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598307729] [2023-02-14 10:48:58,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:48:58,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:48:58,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:58,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:48:58,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:58,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:48:58,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:59,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 10:48:59,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:59,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-14 10:48:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:59,012 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 10:48:59,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:48:59,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598307729] [2023-02-14 10:48:59,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598307729] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:48:59,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461208387] [2023-02-14 10:48:59,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:48:59,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:48:59,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:48:59,014 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 10:48:59,040 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 10:48:59,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:59,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-14 10:48:59,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:48:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 10:48:59,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:48:59,201 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 10:48:59,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461208387] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:48:59,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:48:59,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-02-14 10:48:59,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019311937] [2023-02-14 10:48:59,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:48:59,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 10:48:59,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:48:59,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 10:48:59,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-14 10:48:59,204 INFO L87 Difference]: Start difference. First operand 132 states and 195 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-14 10:48:59,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:48:59,356 INFO L93 Difference]: Finished difference Result 330 states and 506 transitions. [2023-02-14 10:48:59,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 10:48:59,358 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2023-02-14 10:48:59,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:48:59,362 INFO L225 Difference]: With dead ends: 330 [2023-02-14 10:48:59,363 INFO L226 Difference]: Without dead ends: 205 [2023-02-14 10:48:59,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2023-02-14 10:48:59,365 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 170 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:48:59,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 447 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:48:59,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-02-14 10:48:59,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 146. [2023-02-14 10:48:59,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 134 states have (on average 1.455223880597015) internal successors, (195), 134 states have internal predecessors, (195), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2023-02-14 10:48:59,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 219 transitions. [2023-02-14 10:48:59,398 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 219 transitions. Word has length 51 [2023-02-14 10:48:59,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:48:59,398 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 219 transitions. [2023-02-14 10:48:59,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-14 10:48:59,399 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 219 transitions. [2023-02-14 10:48:59,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-14 10:48:59,401 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:48:59,401 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:48:59,446 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 10:48:59,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:48:59,609 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:48:59,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:48:59,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1188656450, now seen corresponding path program 1 times [2023-02-14 10:48:59,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:48:59,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900045124] [2023-02-14 10:48:59,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:48:59,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:48:59,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:59,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:48:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:59,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:48:59,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:59,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-14 10:48:59,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:59,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-14 10:48:59,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:59,729 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 10:48:59,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:48:59,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900045124] [2023-02-14 10:48:59,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900045124] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:48:59,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901635506] [2023-02-14 10:48:59,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:48:59,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:48:59,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:48:59,732 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 10:48:59,761 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 10:48:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:59,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-14 10:48:59,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:48:59,844 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 10:48:59,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:48:59,909 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-14 10:48:59,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901635506] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 10:48:59,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:48:59,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 7] total 13 [2023-02-14 10:48:59,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865363471] [2023-02-14 10:48:59,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:48:59,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 10:48:59,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:48:59,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 10:48:59,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-02-14 10:48:59,912 INFO L87 Difference]: Start difference. First operand 146 states and 219 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 10:48:59,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:48:59,958 INFO L93 Difference]: Finished difference Result 169 states and 243 transitions. [2023-02-14 10:48:59,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 10:48:59,958 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 53 [2023-02-14 10:48:59,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:48:59,960 INFO L225 Difference]: With dead ends: 169 [2023-02-14 10:48:59,960 INFO L226 Difference]: Without dead ends: 163 [2023-02-14 10:48:59,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-02-14 10:48:59,961 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 22 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:48:59,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 373 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:48:59,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-02-14 10:48:59,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2023-02-14 10:48:59,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 149 states have (on average 1.4161073825503356) internal successors, (211), 149 states have internal predecessors, (211), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2023-02-14 10:48:59,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 235 transitions. [2023-02-14 10:48:59,976 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 235 transitions. Word has length 53 [2023-02-14 10:48:59,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:48:59,976 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 235 transitions. [2023-02-14 10:48:59,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 10:48:59,976 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 235 transitions. [2023-02-14 10:48:59,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-14 10:48:59,977 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:48:59,977 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:48:59,985 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 10:49:00,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:49:00,183 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:49:00,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:49:00,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1245914752, now seen corresponding path program 1 times [2023-02-14 10:49:00,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:49:00,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202830057] [2023-02-14 10:49:00,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:49:00,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:49:00,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:49:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:49:00,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-14 10:49:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-14 10:49:00,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,259 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-14 10:49:00,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:49:00,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202830057] [2023-02-14 10:49:00,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202830057] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:49:00,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:49:00,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 10:49:00,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618713470] [2023-02-14 10:49:00,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:49:00,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 10:49:00,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:49:00,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 10:49:00,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-14 10:49:00,261 INFO L87 Difference]: Start difference. First operand 161 states and 235 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 10:49:00,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:49:00,287 INFO L93 Difference]: Finished difference Result 167 states and 240 transitions. [2023-02-14 10:49:00,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 10:49:00,288 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 53 [2023-02-14 10:49:00,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:49:00,298 INFO L225 Difference]: With dead ends: 167 [2023-02-14 10:49:00,298 INFO L226 Difference]: Without dead ends: 150 [2023-02-14 10:49:00,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-14 10:49:00,299 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 2 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:49:00,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 475 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:49:00,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-02-14 10:49:00,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2023-02-14 10:49:00,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 138 states have (on average 1.4202898550724639) internal successors, (196), 139 states have internal predecessors, (196), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-02-14 10:49:00,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 217 transitions. [2023-02-14 10:49:00,306 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 217 transitions. Word has length 53 [2023-02-14 10:49:00,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:49:00,307 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 217 transitions. [2023-02-14 10:49:00,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-14 10:49:00,307 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 217 transitions. [2023-02-14 10:49:00,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-14 10:49:00,308 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:49:00,308 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:49:00,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-14 10:49:00,308 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:49:00,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:49:00,309 INFO L85 PathProgramCache]: Analyzing trace with hash 660451629, now seen corresponding path program 1 times [2023-02-14 10:49:00,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:49:00,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988443867] [2023-02-14 10:49:00,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:49:00,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:49:00,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:49:00,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:49:00,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-14 10:49:00,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-14 10:49:00,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,403 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 10:49:00,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:49:00,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988443867] [2023-02-14 10:49:00,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988443867] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:49:00,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153594717] [2023-02-14 10:49:00,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:49:00,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:49:00,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:49:00,405 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 10:49:00,429 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 10:49:00,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-14 10:49:00,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:49:00,502 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 10:49:00,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 10:49:00,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153594717] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:49:00,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 10:49:00,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-02-14 10:49:00,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668079125] [2023-02-14 10:49:00,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:49:00,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 10:49:00,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:49:00,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 10:49:00,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-14 10:49:00,505 INFO L87 Difference]: Start difference. First operand 150 states and 217 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 10:49:00,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:49:00,595 INFO L93 Difference]: Finished difference Result 321 states and 469 transitions. [2023-02-14 10:49:00,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 10:49:00,596 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2023-02-14 10:49:00,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:49:00,597 INFO L225 Difference]: With dead ends: 321 [2023-02-14 10:49:00,597 INFO L226 Difference]: Without dead ends: 178 [2023-02-14 10:49:00,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-14 10:49:00,600 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 29 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:49:00,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 322 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:49:00,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-02-14 10:49:00,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 150. [2023-02-14 10:49:00,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 138 states have (on average 1.4202898550724639) internal successors, (196), 139 states have internal predecessors, (196), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-02-14 10:49:00,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 217 transitions. [2023-02-14 10:49:00,611 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 217 transitions. Word has length 55 [2023-02-14 10:49:00,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:49:00,613 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 217 transitions. [2023-02-14 10:49:00,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 10:49:00,613 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 217 transitions. [2023-02-14 10:49:00,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-14 10:49:00,614 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:49:00,614 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:49:00,625 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 10:49:00,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:49:00,821 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:49:00,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:49:00,821 INFO L85 PathProgramCache]: Analyzing trace with hash 340970481, now seen corresponding path program 1 times [2023-02-14 10:49:00,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:49:00,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820681654] [2023-02-14 10:49:00,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:49:00,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:49:00,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:49:00,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:49:00,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 10:49:00,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-14 10:49:00,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,984 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 10:49:00,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:49:00,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820681654] [2023-02-14 10:49:00,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820681654] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:49:00,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145154447] [2023-02-14 10:49:00,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:49:00,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:49:00,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:49:00,993 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 10:49:00,996 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 10:49:01,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:01,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-14 10:49:01,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:49:01,113 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 10:49:01,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:49:01,210 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 10:49:01,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145154447] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:49:01,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:49:01,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-02-14 10:49:01,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628218866] [2023-02-14 10:49:01,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:49:01,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-14 10:49:01,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:49:01,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-14 10:49:01,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2023-02-14 10:49:01,215 INFO L87 Difference]: Start difference. First operand 150 states and 217 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-14 10:49:01,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:49:01,649 INFO L93 Difference]: Finished difference Result 343 states and 506 transitions. [2023-02-14 10:49:01,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 10:49:01,653 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 58 [2023-02-14 10:49:01,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:49:01,655 INFO L225 Difference]: With dead ends: 343 [2023-02-14 10:49:01,655 INFO L226 Difference]: Without dead ends: 200 [2023-02-14 10:49:01,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=186, Unknown=0, NotChecked=0, Total=306 [2023-02-14 10:49:01,656 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 148 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 10:49:01,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 500 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 10:49:01,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-02-14 10:49:01,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 149. [2023-02-14 10:49:01,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 137 states have (on average 1.416058394160584) internal successors, (194), 138 states have internal predecessors, (194), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-02-14 10:49:01,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 215 transitions. [2023-02-14 10:49:01,665 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 215 transitions. Word has length 58 [2023-02-14 10:49:01,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:49:01,666 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 215 transitions. [2023-02-14 10:49:01,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-14 10:49:01,666 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 215 transitions. [2023-02-14 10:49:01,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-14 10:49:01,667 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:49:01,667 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:49:01,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-14 10:49:01,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:49:01,872 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:49:01,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:49:01,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1788145183, now seen corresponding path program 1 times [2023-02-14 10:49:01,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:49:01,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637976238] [2023-02-14 10:49:01,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:49:01,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:49:01,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:01,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:49:01,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:01,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:49:01,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:01,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-14 10:49:01,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:01,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-14 10:49:01,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:01,984 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 10:49:01,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:49:01,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637976238] [2023-02-14 10:49:01,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637976238] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:49:01,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735155716] [2023-02-14 10:49:01,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:49:01,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:49:01,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:49:01,989 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 10:49:02,014 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 10:49:02,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:02,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-14 10:49:02,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:49:02,135 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 10:49:02,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:49:02,306 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 10:49:02,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735155716] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:49:02,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:49:02,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-02-14 10:49:02,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965597217] [2023-02-14 10:49:02,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:49:02,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-14 10:49:02,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:49:02,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-14 10:49:02,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2023-02-14 10:49:02,309 INFO L87 Difference]: Start difference. First operand 149 states and 215 transitions. Second operand has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-14 10:49:02,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:49:02,562 INFO L93 Difference]: Finished difference Result 448 states and 678 transitions. [2023-02-14 10:49:02,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-14 10:49:02,563 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2023-02-14 10:49:02,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:49:02,565 INFO L225 Difference]: With dead ends: 448 [2023-02-14 10:49:02,565 INFO L226 Difference]: Without dead ends: 306 [2023-02-14 10:49:02,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=294, Invalid=462, Unknown=0, NotChecked=0, Total=756 [2023-02-14 10:49:02,567 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 545 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:49:02,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 596 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:49:02,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2023-02-14 10:49:02,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 168. [2023-02-14 10:49:02,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 156 states have (on average 1.4487179487179487) internal successors, (226), 157 states have internal predecessors, (226), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-02-14 10:49:02,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 247 transitions. [2023-02-14 10:49:02,580 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 247 transitions. Word has length 62 [2023-02-14 10:49:02,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:49:02,581 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 247 transitions. [2023-02-14 10:49:02,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-14 10:49:02,581 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 247 transitions. [2023-02-14 10:49:02,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-14 10:49:02,582 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:49:02,582 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:49:02,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 10:49:02,790 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,SelfDestructingSolverStorable10 [2023-02-14 10:49:02,791 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:49:02,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:49:02,791 INFO L85 PathProgramCache]: Analyzing trace with hash -71739151, now seen corresponding path program 2 times [2023-02-14 10:49:02,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:49:02,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276011578] [2023-02-14 10:49:02,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:49:02,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:49:02,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:02,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:49:02,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:02,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:49:02,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:03,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-02-14 10:49:03,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:03,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-02-14 10:49:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:03,011 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 10:49:03,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:49:03,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276011578] [2023-02-14 10:49:03,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276011578] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:49:03,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123226394] [2023-02-14 10:49:03,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 10:49:03,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:49:03,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:49:03,014 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 10:49:03,041 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 10:49:03,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 10:49:03,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:49:03,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-14 10:49:03,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:49:03,214 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 10:49:03,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:49:03,546 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 10:49:03,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123226394] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:49:03,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:49:03,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2023-02-14 10:49:03,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466322456] [2023-02-14 10:49:03,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:49:03,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-14 10:49:03,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:49:03,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-14 10:49:03,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=409, Unknown=0, NotChecked=0, Total=600 [2023-02-14 10:49:03,548 INFO L87 Difference]: Start difference. First operand 168 states and 247 transitions. Second operand has 25 states, 25 states have (on average 4.44) internal successors, (111), 25 states have internal predecessors, (111), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-14 10:49:16,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:49:16,378 INFO L93 Difference]: Finished difference Result 421 states and 630 transitions. [2023-02-14 10:49:16,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-14 10:49:16,378 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.44) internal successors, (111), 25 states have internal predecessors, (111), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2023-02-14 10:49:16,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:49:16,380 INFO L225 Difference]: With dead ends: 421 [2023-02-14 10:49:16,380 INFO L226 Difference]: Without dead ends: 260 [2023-02-14 10:49:16,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=501, Invalid=902, Unknown=3, NotChecked=0, Total=1406 [2023-02-14 10:49:16,382 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 283 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 10:49:16,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 1046 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 10:49:16,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-02-14 10:49:16,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 173. [2023-02-14 10:49:16,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 161 states have (on average 1.453416149068323) internal successors, (234), 162 states have internal predecessors, (234), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-02-14 10:49:16,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 255 transitions. [2023-02-14 10:49:16,394 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 255 transitions. Word has length 70 [2023-02-14 10:49:16,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:49:16,395 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 255 transitions. [2023-02-14 10:49:16,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.44) internal successors, (111), 25 states have internal predecessors, (111), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-14 10:49:16,395 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 255 transitions. [2023-02-14 10:49:16,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-02-14 10:49:16,396 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:49:16,396 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:49:16,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 10:49:16,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:49:16,601 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:49:16,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:49:16,602 INFO L85 PathProgramCache]: Analyzing trace with hash 270194017, now seen corresponding path program 2 times [2023-02-14 10:49:16,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:49:16,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105614419] [2023-02-14 10:49:16,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:49:16,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:49:16,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:16,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:49:16,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:16,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:49:16,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:16,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-02-14 10:49:16,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:16,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-02-14 10:49:16,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:16,882 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 10:49:16,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:49:16,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105614419] [2023-02-14 10:49:16,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105614419] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:49:16,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352325376] [2023-02-14 10:49:16,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 10:49:16,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:49:16,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:49:16,884 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 10:49:16,887 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 10:49:16,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 10:49:16,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:49:16,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-14 10:49:16,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:49:17,125 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 10:49:17,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:49:17,518 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 10:49:17,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352325376] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:49:17,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:49:17,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 38 [2023-02-14 10:49:17,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417110639] [2023-02-14 10:49:17,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:49:17,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-14 10:49:17,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:49:17,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-14 10:49:17,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=916, Unknown=0, NotChecked=0, Total=1406 [2023-02-14 10:49:17,521 INFO L87 Difference]: Start difference. First operand 173 states and 255 transitions. Second operand has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-14 10:49:18,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:49:18,047 INFO L93 Difference]: Finished difference Result 658 states and 1022 transitions. [2023-02-14 10:49:18,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-14 10:49:18,048 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 80 [2023-02-14 10:49:18,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:49:18,050 INFO L225 Difference]: With dead ends: 658 [2023-02-14 10:49:18,050 INFO L226 Difference]: Without dead ends: 492 [2023-02-14 10:49:18,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1020, Invalid=1632, Unknown=0, NotChecked=0, Total=2652 [2023-02-14 10:49:18,052 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 831 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 10:49:18,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 845 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 10:49:18,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2023-02-14 10:49:18,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 204. [2023-02-14 10:49:18,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 192 states have (on average 1.4895833333333333) internal successors, (286), 193 states have internal predecessors, (286), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-02-14 10:49:18,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 307 transitions. [2023-02-14 10:49:18,072 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 307 transitions. Word has length 80 [2023-02-14 10:49:18,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:49:18,072 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 307 transitions. [2023-02-14 10:49:18,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-14 10:49:18,073 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 307 transitions. [2023-02-14 10:49:18,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-02-14 10:49:18,074 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:49:18,074 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:49:18,081 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 10:49:18,279 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,SelfDestructingSolverStorable12 [2023-02-14 10:49:18,279 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:49:18,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:49:18,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1417933553, now seen corresponding path program 3 times [2023-02-14 10:49:18,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:49:18,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920144874] [2023-02-14 10:49:18,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:49:18,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:49:18,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:18,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:49:18,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:18,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:49:18,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:18,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-02-14 10:49:18,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:18,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2023-02-14 10:49:18,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:18,854 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 4 proven. 282 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 10:49:18,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:49:18,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920144874] [2023-02-14 10:49:18,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920144874] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:49:18,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655420046] [2023-02-14 10:49:18,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 10:49:18,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:49:18,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:49:18,857 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 10:49:18,884 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 10:49:20,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2023-02-14 10:49:20,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:49:20,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 61 conjunts are in the unsatisfiable core [2023-02-14 10:49:20,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:49:21,013 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 10 proven. 282 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 10:49:21,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:49:23,126 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 10 proven. 282 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 10:49:23,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655420046] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:49:23,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:49:23,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 28, 29] total 71 [2023-02-14 10:49:23,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903266758] [2023-02-14 10:49:23,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:49:23,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-02-14 10:49:23,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:49:23,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-02-14 10:49:23,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=4496, Unknown=0, NotChecked=0, Total=4970 [2023-02-14 10:49:23,130 INFO L87 Difference]: Start difference. First operand 204 states and 307 transitions. Second operand has 71 states, 71 states have (on average 2.859154929577465) internal successors, (203), 67 states have internal predecessors, (203), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-14 10:49:33,875 WARN L233 SmtUtils]: Spent 5.84s on a formula simplification that was a NOOP. DAG size: 107 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 10:49:43,099 WARN L233 SmtUtils]: Spent 6.08s on a formula simplification that was a NOOP. DAG size: 111 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 10:49:56,704 WARN L233 SmtUtils]: Spent 8.11s on a formula simplification that was a NOOP. DAG size: 115 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 10:50:52,619 WARN L233 SmtUtils]: Spent 5.39s on a formula simplification that was a NOOP. DAG size: 100 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 10:51:17,292 WARN L233 SmtUtils]: Spent 5.87s on a formula simplification that was a NOOP. DAG size: 111 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 10:51:28,588 WARN L233 SmtUtils]: Spent 6.78s on a formula simplification that was a NOOP. DAG size: 107 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 10:52:32,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:52:32,889 INFO L93 Difference]: Finished difference Result 1331 states and 2487 transitions. [2023-02-14 10:52:32,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 294 states. [2023-02-14 10:52:32,893 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.859154929577465) internal successors, (203), 67 states have internal predecessors, (203), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) Word has length 94 [2023-02-14 10:52:32,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:52:32,901 INFO L225 Difference]: With dead ends: 1331 [2023-02-14 10:52:32,901 INFO L226 Difference]: Without dead ends: 1127 [2023-02-14 10:52:32,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 356 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49663 ImplicationChecksByTransitivity, 178.2s TimeCoverageRelationStatistics Valid=20293, Invalid=107513, Unknown=0, NotChecked=0, Total=127806 [2023-02-14 10:52:32,922 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 6863 mSDsluCounter, 7964 mSDsCounter, 0 mSdLazyCounter, 12168 mSolverCounterSat, 561 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6962 SdHoareTripleChecker+Valid, 8200 SdHoareTripleChecker+Invalid, 12729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 561 IncrementalHoareTripleChecker+Valid, 12168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:52:32,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6962 Valid, 8200 Invalid, 12729 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [561 Valid, 12168 Invalid, 0 Unknown, 0 Unchecked, 13.0s Time] [2023-02-14 10:52:32,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2023-02-14 10:52:33,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 239. [2023-02-14 10:52:33,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 224 states have (on average 1.5044642857142858) internal successors, (337), 226 states have internal predecessors, (337), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 9 states have call predecessors, (28), 7 states have call successors, (28) [2023-02-14 10:52:33,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 373 transitions. [2023-02-14 10:52:33,089 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 373 transitions. Word has length 94 [2023-02-14 10:52:33,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:52:33,090 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 373 transitions. [2023-02-14 10:52:33,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.859154929577465) internal successors, (203), 67 states have internal predecessors, (203), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-14 10:52:33,090 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 373 transitions. [2023-02-14 10:52:33,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-02-14 10:52:33,091 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:52:33,091 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:52:33,100 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 10:52:33,298 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,SelfDestructingSolverStorable13 [2023-02-14 10:52:33,298 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:52:33,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:52:33,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1636741129, now seen corresponding path program 1 times [2023-02-14 10:52:33,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:52:33,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545642516] [2023-02-14 10:52:33,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:52:33,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:52:33,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:52:33,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:52:33,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:52:33,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:52:33,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:52:33,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-02-14 10:52:33,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:52:33,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-02-14 10:52:33,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:52:33,810 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 4 proven. 324 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 10:52:33,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:52:33,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545642516] [2023-02-14 10:52:33,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545642516] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:52:33,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026937222] [2023-02-14 10:52:33,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:52:33,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:52:33,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:52:33,813 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 10:52:33,815 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 10:52:33,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:52:33,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-14 10:52:33,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:52:33,925 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2023-02-14 10:52:33,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 10:52:33,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026937222] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:52:33,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 10:52:33,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [19] total 21 [2023-02-14 10:52:33,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928821760] [2023-02-14 10:52:33,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:52:33,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 10:52:33,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:52:33,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 10:52:33,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-02-14 10:52:33,928 INFO L87 Difference]: Start difference. First operand 239 states and 373 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 10:52:33,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:52:33,975 INFO L93 Difference]: Finished difference Result 491 states and 790 transitions. [2023-02-14 10:52:33,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 10:52:33,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 98 [2023-02-14 10:52:33,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:52:33,978 INFO L225 Difference]: With dead ends: 491 [2023-02-14 10:52:33,978 INFO L226 Difference]: Without dead ends: 259 [2023-02-14 10:52:33,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-02-14 10:52:33,981 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 4 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:52:33,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 277 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:52:33,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-02-14 10:52:34,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 245. [2023-02-14 10:52:34,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 230 states have (on average 1.491304347826087) internal successors, (343), 232 states have internal predecessors, (343), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 9 states have call predecessors, (28), 7 states have call successors, (28) [2023-02-14 10:52:34,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 379 transitions. [2023-02-14 10:52:34,012 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 379 transitions. Word has length 98 [2023-02-14 10:52:34,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:52:34,012 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 379 transitions. [2023-02-14 10:52:34,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 10:52:34,013 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 379 transitions. [2023-02-14 10:52:34,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-02-14 10:52:34,016 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:52:34,016 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:52:34,027 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 10:52:34,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-14 10:52:34,222 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:52:34,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:52:34,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1245904171, now seen corresponding path program 1 times [2023-02-14 10:52:34,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:52:34,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237236542] [2023-02-14 10:52:34,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:52:34,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:52:34,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:52:34,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:52:34,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:52:34,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:52:34,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:52:34,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-02-14 10:52:34,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:52:34,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-02-14 10:52:34,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:52:34,881 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 4 proven. 324 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 10:52:34,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:52:34,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237236542] [2023-02-14 10:52:34,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237236542] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:52:34,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687185274] [2023-02-14 10:52:34,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:52:34,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:52:34,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:52:34,884 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 10:52:34,887 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 10:52:35,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:52:35,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-14 10:52:35,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:52:35,461 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 25 proven. 315 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 10:52:35,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:52:36,155 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 4 proven. 324 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 10:52:36,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687185274] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:52:36,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:52:36,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 52 [2023-02-14 10:52:36,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318002357] [2023-02-14 10:52:36,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:52:36,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-14 10:52:36,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:52:36,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-14 10:52:36,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2023-02-14 10:52:36,158 INFO L87 Difference]: Start difference. First operand 245 states and 379 transitions. Second operand has 52 states, 52 states have (on average 3.769230769230769) internal successors, (196), 52 states have internal predecessors, (196), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-14 10:52:59,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:52:59,319 INFO L93 Difference]: Finished difference Result 657 states and 1044 transitions. [2023-02-14 10:52:59,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-14 10:52:59,319 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.769230769230769) internal successors, (196), 52 states have internal predecessors, (196), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 99 [2023-02-14 10:52:59,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:52:59,322 INFO L225 Difference]: With dead ends: 657 [2023-02-14 10:52:59,322 INFO L226 Difference]: Without dead ends: 419 [2023-02-14 10:52:59,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1526 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=1692, Invalid=4006, Unknown=2, NotChecked=0, Total=5700 [2023-02-14 10:52:59,325 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 745 mSDsluCounter, 2408 mSDsCounter, 0 mSdLazyCounter, 3491 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 2569 SdHoareTripleChecker+Invalid, 3545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 3491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:52:59,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [745 Valid, 2569 Invalid, 3545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 3491 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-02-14 10:52:59,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2023-02-14 10:52:59,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 240. [2023-02-14 10:52:59,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 225 states have (on average 1.4844444444444445) internal successors, (334), 227 states have internal predecessors, (334), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 9 states have call predecessors, (28), 7 states have call successors, (28) [2023-02-14 10:52:59,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 370 transitions. [2023-02-14 10:52:59,371 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 370 transitions. Word has length 99 [2023-02-14 10:52:59,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:52:59,371 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 370 transitions. [2023-02-14 10:52:59,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.769230769230769) internal successors, (196), 52 states have internal predecessors, (196), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-14 10:52:59,372 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 370 transitions. [2023-02-14 10:52:59,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-02-14 10:52:59,373 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:52:59,373 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:52:59,381 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 10:52:59,578 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,SelfDestructingSolverStorable15 [2023-02-14 10:52:59,579 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:52:59,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:52:59,579 INFO L85 PathProgramCache]: Analyzing trace with hash 870628449, now seen corresponding path program 3 times [2023-02-14 10:52:59,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:52:59,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650797660] [2023-02-14 10:52:59,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:52:59,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:52:59,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:52:59,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:52:59,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:52:59,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:52:59,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:53:00,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-02-14 10:53:00,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:53:00,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2023-02-14 10:53:00,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:53:00,310 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 10:53:00,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:53:00,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650797660] [2023-02-14 10:53:00,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650797660] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:53:00,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655062076] [2023-02-14 10:53:00,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 10:53:00,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:53:00,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:53:00,312 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 10:53:00,315 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 10:53:00,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2023-02-14 10:53:00,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:53:00,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-14 10:53:00,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:53:01,085 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 25 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 10:53:01,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:53:02,268 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 10:53:02,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655062076] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:53:02,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:53:02,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 74 [2023-02-14 10:53:02,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329603431] [2023-02-14 10:53:02,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:53:02,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-02-14 10:53:02,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:53:02,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-02-14 10:53:02,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1846, Invalid=3556, Unknown=0, NotChecked=0, Total=5402 [2023-02-14 10:53:02,272 INFO L87 Difference]: Start difference. First operand 240 states and 370 transitions. Second operand has 74 states, 74 states have (on average 3.445945945945946) internal successors, (255), 74 states have internal predecessors, (255), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-14 10:53:04,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:53:04,103 INFO L93 Difference]: Finished difference Result 1225 states and 2089 transitions. [2023-02-14 10:53:04,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-02-14 10:53:04,109 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.445945945945946) internal successors, (255), 74 states have internal predecessors, (255), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 116 [2023-02-14 10:53:04,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:53:04,119 INFO L225 Difference]: With dead ends: 1225 [2023-02-14 10:53:04,119 INFO L226 Difference]: Without dead ends: 992 [2023-02-14 10:53:04,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2881 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3768, Invalid=6132, Unknown=0, NotChecked=0, Total=9900 [2023-02-14 10:53:04,123 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 3105 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3105 SdHoareTripleChecker+Valid, 1224 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 10:53:04,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3105 Valid, 1224 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 10:53:04,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2023-02-14 10:53:04,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 294. [2023-02-14 10:53:04,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 279 states have (on average 1.5197132616487454) internal successors, (424), 281 states have internal predecessors, (424), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 9 states have call predecessors, (28), 7 states have call successors, (28) [2023-02-14 10:53:04,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 460 transitions. [2023-02-14 10:53:04,206 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 460 transitions. Word has length 116 [2023-02-14 10:53:04,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:53:04,206 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 460 transitions. [2023-02-14 10:53:04,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.445945945945946) internal successors, (255), 74 states have internal predecessors, (255), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-14 10:53:04,207 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 460 transitions. [2023-02-14 10:53:04,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-02-14 10:53:04,208 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:53:04,208 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:53:04,219 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 10:53:04,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:53:04,414 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:53:04,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:53:04,415 INFO L85 PathProgramCache]: Analyzing trace with hash -169172583, now seen corresponding path program 2 times [2023-02-14 10:53:04,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:53:04,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059667848] [2023-02-14 10:53:04,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:53:04,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:53:04,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:53:05,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:53:05,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:53:05,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:53:05,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:53:06,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-02-14 10:53:06,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:53:06,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2023-02-14 10:53:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:53:06,957 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 10 proven. 837 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 10:53:06,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:53:06,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059667848] [2023-02-14 10:53:06,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059667848] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:53:06,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921501314] [2023-02-14 10:53:06,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 10:53:06,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:53:06,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:53:06,959 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 10:53:06,962 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 10:53:07,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 10:53:07,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:53:07,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 130 conjunts are in the unsatisfiable core [2023-02-14 10:53:07,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:53:08,956 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 10 proven. 837 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 10:53:08,956 INFO L328 TraceCheckSpWp]: Computing backward predicates...