./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/gcd02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5317dae 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/recursive/gcd02.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 5840bf8cb045a250261e3957017079dce43a53700f7c91e31c16b36d5b980e00 --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 02:55:43,210 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 02:55:43,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 02:55:43,229 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 02:55:43,229 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 02:55:43,230 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 02:55:43,231 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 02:55:43,232 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 02:55:43,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 02:55:43,234 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 02:55:43,234 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 02:55:43,235 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 02:55:43,235 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 02:55:43,236 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 02:55:43,237 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 02:55:43,237 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 02:55:43,238 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 02:55:43,239 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 02:55:43,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 02:55:43,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 02:55:43,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 02:55:43,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 02:55:43,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 02:55:43,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 02:55:43,246 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 02:55:43,246 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 02:55:43,247 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 02:55:43,247 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 02:55:43,248 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 02:55:43,248 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 02:55:43,249 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 02:55:43,249 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 02:55:43,250 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 02:55:43,250 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 02:55:43,251 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 02:55:43,251 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 02:55:43,252 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 02:55:43,252 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 02:55:43,252 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 02:55:43,253 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 02:55:43,253 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 02:55:43,254 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-16 02:55:43,267 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 02:55:43,271 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 02:55:43,272 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 02:55:43,273 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 02:55:43,273 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 02:55:43,274 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 02:55:43,275 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 02:55:43,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 02:55:43,275 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 02:55:43,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 02:55:43,276 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 02:55:43,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 02:55:43,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 02:55:43,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 02:55:43,276 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 02:55:43,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 02:55:43,277 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 02:55:43,277 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 02:55:43,277 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 02:55:43,277 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 02:55:43,277 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 02:55:43,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 02:55:43,277 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 02:55:43,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 02:55:43,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 02:55:43,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 02:55:43,278 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 02:55:43,278 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 02:55:43,278 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 02:55:43,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 02:55:43,278 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 02:55:43,279 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 02:55:43,279 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 02:55:43,279 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 02:55:43,279 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 02:55:43,279 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5840bf8cb045a250261e3957017079dce43a53700f7c91e31c16b36d5b980e00 [2023-02-16 02:55:43,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 02:55:43,482 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 02:55:43,484 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 02:55:43,485 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 02:55:43,485 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 02:55:43,486 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/gcd02.c [2023-02-16 02:55:44,707 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 02:55:44,951 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 02:55:44,952 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/gcd02.c [2023-02-16 02:55:44,957 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed1aa147e/c78110323b9b4ce1b5dde6137c890c14/FLAGcf89c7253 [2023-02-16 02:55:44,972 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed1aa147e/c78110323b9b4ce1b5dde6137c890c14 [2023-02-16 02:55:44,975 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 02:55:44,977 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 02:55:44,979 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 02:55:44,980 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 02:55:44,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 02:55:44,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 02:55:44" (1/1) ... [2023-02-16 02:55:44,986 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@214046af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:55:44, skipping insertion in model container [2023-02-16 02:55:44,986 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 02:55:44" (1/1) ... [2023-02-16 02:55:44,991 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 02:55:45,006 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 02:55:45,101 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/recursive/gcd02.c[623,636] [2023-02-16 02:55:45,119 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/recursive/gcd02.c[1283,1296] [2023-02-16 02:55:45,121 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 02:55:45,129 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 02:55:45,141 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/recursive/gcd02.c[623,636] [2023-02-16 02:55:45,150 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/recursive/gcd02.c[1283,1296] [2023-02-16 02:55:45,151 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 02:55:45,160 INFO L208 MainTranslator]: Completed translation [2023-02-16 02:55:45,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:55:45 WrapperNode [2023-02-16 02:55:45,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 02:55:45,162 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 02:55:45,162 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 02:55:45,162 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 02:55:45,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:55:45" (1/1) ... [2023-02-16 02:55:45,172 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:55:45" (1/1) ... [2023-02-16 02:55:45,183 INFO L138 Inliner]: procedures = 14, calls = 20, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 45 [2023-02-16 02:55:45,184 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 02:55:45,185 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 02:55:45,185 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 02:55:45,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 02:55:45,191 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:55:45" (1/1) ... [2023-02-16 02:55:45,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:55:45" (1/1) ... [2023-02-16 02:55:45,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:55:45" (1/1) ... [2023-02-16 02:55:45,193 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:55:45" (1/1) ... [2023-02-16 02:55:45,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:55:45" (1/1) ... [2023-02-16 02:55:45,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:55:45" (1/1) ... [2023-02-16 02:55:45,197 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:55:45" (1/1) ... [2023-02-16 02:55:45,197 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:55:45" (1/1) ... [2023-02-16 02:55:45,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 02:55:45,199 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 02:55:45,199 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 02:55:45,199 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 02:55:45,200 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:55:45" (1/1) ... [2023-02-16 02:55:45,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 02:55:45,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:55:45,235 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-16 02:55:45,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-16 02:55:45,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 02:55:45,265 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2023-02-16 02:55:45,265 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2023-02-16 02:55:45,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 02:55:45,266 INFO L130 BoogieDeclarations]: Found specification of procedure divides [2023-02-16 02:55:45,266 INFO L138 BoogieDeclarations]: Found implementation of procedure divides [2023-02-16 02:55:45,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 02:55:45,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 02:55:45,307 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 02:55:45,308 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 02:55:45,414 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 02:55:45,419 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 02:55:45,419 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-16 02:55:45,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:55:45 BoogieIcfgContainer [2023-02-16 02:55:45,421 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 02:55:45,423 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 02:55:45,423 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 02:55:45,425 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 02:55:45,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 02:55:44" (1/3) ... [2023-02-16 02:55:45,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22899c68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 02:55:45, skipping insertion in model container [2023-02-16 02:55:45,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:55:45" (2/3) ... [2023-02-16 02:55:45,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22899c68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 02:55:45, skipping insertion in model container [2023-02-16 02:55:45,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:55:45" (3/3) ... [2023-02-16 02:55:45,427 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd02.c [2023-02-16 02:55:45,438 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 02:55:45,438 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-02-16 02:55:45,504 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 02:55:45,530 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;@7a1f8c72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 02:55:45,530 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-02-16 02:55:45,534 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 26 states have internal predecessors, (35), 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) [2023-02-16 02:55:45,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-16 02:55:45,552 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:55:45,553 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:55:45,554 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:55:45,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:55:45,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1041004109, now seen corresponding path program 1 times [2023-02-16 02:55:45,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:55:45,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312098443] [2023-02-16 02:55:45,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:45,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:55:45,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:45,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 02:55:45,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:55:45,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312098443] [2023-02-16 02:55:45,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312098443] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 02:55:45,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 02:55:45,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-16 02:55:45,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476370430] [2023-02-16 02:55:45,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 02:55:45,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 02:55:45,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:55:45,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 02:55:45,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-16 02:55:45,873 INFO L87 Difference]: Start difference. First operand has 34 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 26 states have internal predecessors, (35), 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 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 02:55:45,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:55:45,994 INFO L93 Difference]: Finished difference Result 78 states and 103 transitions. [2023-02-16 02:55:45,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-16 02:55:46,004 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-16 02:55:46,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:55:46,009 INFO L225 Difference]: With dead ends: 78 [2023-02-16 02:55:46,009 INFO L226 Difference]: Without dead ends: 41 [2023-02-16 02:55:46,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-16 02:55:46,017 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 34 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:55:46,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 133 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:55:46,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-16 02:55:46,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-02-16 02:55:46,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 states have internal predecessors, (36), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-16 02:55:46,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2023-02-16 02:55:46,050 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 9 [2023-02-16 02:55:46,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:55:46,050 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2023-02-16 02:55:46,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 02:55:46,051 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2023-02-16 02:55:46,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-16 02:55:46,052 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:55:46,052 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:55:46,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 02:55:46,052 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:55:46,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:55:46,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1602001293, now seen corresponding path program 1 times [2023-02-16 02:55:46,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:55:46,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596319085] [2023-02-16 02:55:46,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:46,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:55:46,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:46,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 02:55:46,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:55:46,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596319085] [2023-02-16 02:55:46,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596319085] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 02:55:46,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 02:55:46,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-16 02:55:46,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407166515] [2023-02-16 02:55:46,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 02:55:46,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 02:55:46,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:55:46,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 02:55:46,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-16 02:55:46,160 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 02:55:46,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:55:46,223 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2023-02-16 02:55:46,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-16 02:55:46,224 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-16 02:55:46,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:55:46,226 INFO L225 Difference]: With dead ends: 59 [2023-02-16 02:55:46,226 INFO L226 Difference]: Without dead ends: 57 [2023-02-16 02:55:46,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-02-16 02:55:46,228 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 17 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 02:55:46,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 120 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 02:55:46,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-02-16 02:55:46,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2023-02-16 02:55:46,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-16 02:55:46,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2023-02-16 02:55:46,245 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 14 [2023-02-16 02:55:46,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:55:46,245 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2023-02-16 02:55:46,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 02:55:46,245 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2023-02-16 02:55:46,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-16 02:55:46,246 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:55:46,246 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:55:46,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-16 02:55:46,247 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:55:46,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:55:46,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1599171148, now seen corresponding path program 1 times [2023-02-16 02:55:46,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:55:46,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411616459] [2023-02-16 02:55:46,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:46,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:55:46,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:46,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 02:55:46,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:55:46,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411616459] [2023-02-16 02:55:46,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411616459] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 02:55:46,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 02:55:46,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-16 02:55:46,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558159146] [2023-02-16 02:55:46,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 02:55:46,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-16 02:55:46,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:55:46,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-16 02:55:46,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-02-16 02:55:46,395 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 02:55:46,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:55:46,505 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2023-02-16 02:55:46,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 02:55:46,506 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-16 02:55:46,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:55:46,510 INFO L225 Difference]: With dead ends: 63 [2023-02-16 02:55:46,510 INFO L226 Difference]: Without dead ends: 61 [2023-02-16 02:55:46,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-02-16 02:55:46,517 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 21 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 02:55:46,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 147 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 02:55:46,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-02-16 02:55:46,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2023-02-16 02:55:46,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-16 02:55:46,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2023-02-16 02:55:46,527 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 14 [2023-02-16 02:55:46,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:55:46,527 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2023-02-16 02:55:46,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 02:55:46,528 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2023-02-16 02:55:46,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-16 02:55:46,528 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:55:46,529 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:55:46,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-16 02:55:46,529 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:55:46,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:55:46,530 INFO L85 PathProgramCache]: Analyzing trace with hash -2110562560, now seen corresponding path program 1 times [2023-02-16 02:55:46,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:55:46,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606838001] [2023-02-16 02:55:46,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:46,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:55:46,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:46,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:55:46,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:46,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 02:55:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:46,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 02:55:46,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:55:46,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606838001] [2023-02-16 02:55:46,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606838001] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 02:55:46,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 02:55:46,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 02:55:46,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109711083] [2023-02-16 02:55:46,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 02:55:46,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 02:55:46,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:55:46,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 02:55:46,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 02:55:46,588 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-16 02:55:46,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:55:46,605 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2023-02-16 02:55:46,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 02:55:46,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-02-16 02:55:46,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:55:46,608 INFO L225 Difference]: With dead ends: 55 [2023-02-16 02:55:46,609 INFO L226 Difference]: Without dead ends: 51 [2023-02-16 02:55:46,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 02:55:46,612 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 02:55:46,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 95 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 02:55:46,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-16 02:55:46,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-02-16 02:55:46,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 37 states have internal predecessors, (44), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-02-16 02:55:46,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2023-02-16 02:55:46,620 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 20 [2023-02-16 02:55:46,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:55:46,620 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2023-02-16 02:55:46,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-16 02:55:46,621 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2023-02-16 02:55:46,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-16 02:55:46,621 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:55:46,621 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:55:46,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-16 02:55:46,622 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:55:46,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:55:46,622 INFO L85 PathProgramCache]: Analyzing trace with hash -291106652, now seen corresponding path program 1 times [2023-02-16 02:55:46,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:55:46,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112480128] [2023-02-16 02:55:46,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:46,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:55:46,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:46,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:55:46,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:46,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 02:55:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 02:55:46,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:55:46,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112480128] [2023-02-16 02:55:46,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112480128] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 02:55:46,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 02:55:46,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-16 02:55:46,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712535751] [2023-02-16 02:55:46,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 02:55:46,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-16 02:55:46,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:55:46,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-16 02:55:46,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-16 02:55:46,826 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 02:55:46,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:55:46,939 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2023-02-16 02:55:46,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 02:55:46,942 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-02-16 02:55:46,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:55:46,945 INFO L225 Difference]: With dead ends: 69 [2023-02-16 02:55:46,945 INFO L226 Difference]: Without dead ends: 65 [2023-02-16 02:55:46,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-16 02:55:46,946 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:55:46,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 100 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:55:46,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-16 02:55:46,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2023-02-16 02:55:46,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 39 states have (on average 1.205128205128205) internal successors, (47), 42 states have internal predecessors, (47), 10 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2023-02-16 02:55:46,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2023-02-16 02:55:46,962 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 21 [2023-02-16 02:55:46,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:55:46,963 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2023-02-16 02:55:46,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 02:55:46,963 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2023-02-16 02:55:46,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-16 02:55:46,967 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:55:46,967 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:55:46,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-16 02:55:46,967 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:55:46,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:55:46,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1709846180, now seen corresponding path program 1 times [2023-02-16 02:55:46,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:55:46,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346972223] [2023-02-16 02:55:46,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:46,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:55:46,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:47,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:55:47,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:47,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 02:55:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:47,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:47,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:47,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 02:55:47,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:55:47,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346972223] [2023-02-16 02:55:47,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346972223] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 02:55:47,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 02:55:47,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 02:55:47,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147918166] [2023-02-16 02:55:47,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 02:55:47,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 02:55:47,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:55:47,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 02:55:47,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 02:55:47,046 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-16 02:55:47,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:55:47,063 INFO L93 Difference]: Finished difference Result 64 states and 79 transitions. [2023-02-16 02:55:47,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 02:55:47,064 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2023-02-16 02:55:47,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:55:47,064 INFO L225 Difference]: With dead ends: 64 [2023-02-16 02:55:47,065 INFO L226 Difference]: Without dead ends: 55 [2023-02-16 02:55:47,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 02:55:47,067 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 02:55:47,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 126 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 02:55:47,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-16 02:55:47,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-02-16 02:55:47,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 10 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2023-02-16 02:55:47,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2023-02-16 02:55:47,087 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 27 [2023-02-16 02:55:47,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:55:47,087 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2023-02-16 02:55:47,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-16 02:55:47,087 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2023-02-16 02:55:47,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-16 02:55:47,089 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:55:47,089 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:55:47,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-16 02:55:47,089 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:55:47,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:55:47,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1148028586, now seen corresponding path program 1 times [2023-02-16 02:55:47,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:55:47,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849377380] [2023-02-16 02:55:47,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:47,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:55:47,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:47,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:55:47,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:47,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 02:55:47,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:47,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:47,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:47,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 02:55:47,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:55:47,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849377380] [2023-02-16 02:55:47,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849377380] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:55:47,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029536374] [2023-02-16 02:55:47,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:47,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:47,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:55:47,377 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:55:47,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 02:55:47,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:47,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-16 02:55:47,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:55:47,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 02:55:47,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:55:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 02:55:47,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029536374] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:55:47,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:55:47,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 15 [2023-02-16 02:55:47,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000767822] [2023-02-16 02:55:47,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:55:47,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-16 02:55:47,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:55:47,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-16 02:55:47,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-02-16 02:55:47,759 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 15 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 14 states have internal predecessors, (32), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-16 02:55:47,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:55:47,933 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2023-02-16 02:55:47,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-16 02:55:47,934 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 14 states have internal predecessors, (32), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 28 [2023-02-16 02:55:47,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:55:47,935 INFO L225 Difference]: With dead ends: 63 [2023-02-16 02:55:47,935 INFO L226 Difference]: Without dead ends: 55 [2023-02-16 02:55:47,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 48 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2023-02-16 02:55:47,936 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 19 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:55:47,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 152 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:55:47,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-16 02:55:47,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2023-02-16 02:55:47,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-16 02:55:47,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2023-02-16 02:55:47,940 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 28 [2023-02-16 02:55:47,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:55:47,941 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2023-02-16 02:55:47,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 14 states have internal predecessors, (32), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-16 02:55:47,941 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2023-02-16 02:55:47,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-16 02:55:47,942 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:55:47,942 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:55:47,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-16 02:55:48,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:48,162 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:55:48,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:55:48,163 INFO L85 PathProgramCache]: Analyzing trace with hash -729806600, now seen corresponding path program 1 times [2023-02-16 02:55:48,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:55:48,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014477170] [2023-02-16 02:55:48,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:48,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:55:48,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:48,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:55:48,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:48,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:55:48,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:48,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 02:55:48,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:48,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 02:55:48,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:55:48,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014477170] [2023-02-16 02:55:48,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014477170] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:55:48,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893767723] [2023-02-16 02:55:48,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:48,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:48,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:55:48,315 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:55:48,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 02:55:48,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:48,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-16 02:55:48,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:55:48,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 02:55:48,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:55:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 02:55:48,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893767723] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:55:48,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:55:48,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2023-02-16 02:55:48,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329717911] [2023-02-16 02:55:48,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:55:48,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-16 02:55:48,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:55:48,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-16 02:55:48,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2023-02-16 02:55:48,662 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-16 02:55:48,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:55:48,808 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2023-02-16 02:55:48,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-16 02:55:48,809 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 29 [2023-02-16 02:55:48,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:55:48,809 INFO L225 Difference]: With dead ends: 74 [2023-02-16 02:55:48,809 INFO L226 Difference]: Without dead ends: 70 [2023-02-16 02:55:48,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2023-02-16 02:55:48,810 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 29 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:55:48,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 202 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:55:48,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-02-16 02:55:48,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2023-02-16 02:55:48,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.146341463414634) internal successors, (47), 42 states have internal predecessors, (47), 10 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2023-02-16 02:55:48,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2023-02-16 02:55:48,816 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 29 [2023-02-16 02:55:48,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:55:48,816 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2023-02-16 02:55:48,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-16 02:55:48,816 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2023-02-16 02:55:48,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-16 02:55:48,817 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:55:48,817 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:55:48,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 02:55:49,022 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,SelfDestructingSolverStorable7 [2023-02-16 02:55:49,022 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:55:49,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:55:49,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1241581992, now seen corresponding path program 1 times [2023-02-16 02:55:49,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:55:49,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579737738] [2023-02-16 02:55:49,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:49,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:55:49,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:49,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:55:49,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:49,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:55:49,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:49,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 02:55:49,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:49,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-16 02:55:49,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:55:49,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579737738] [2023-02-16 02:55:49,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579737738] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 02:55:49,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 02:55:49,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-16 02:55:49,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36727511] [2023-02-16 02:55:49,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 02:55:49,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-16 02:55:49,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:55:49,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-16 02:55:49,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-02-16 02:55:49,151 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 02:55:49,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:55:49,222 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2023-02-16 02:55:49,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 02:55:49,223 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2023-02-16 02:55:49,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:55:49,224 INFO L225 Difference]: With dead ends: 80 [2023-02-16 02:55:49,224 INFO L226 Difference]: Without dead ends: 76 [2023-02-16 02:55:49,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-02-16 02:55:49,225 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 15 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:55:49,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 113 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:55:49,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-02-16 02:55:49,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2023-02-16 02:55:49,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 10 states have call successors, (10), 4 states have call predecessors, (10), 8 states have return successors, (19), 14 states have call predecessors, (19), 10 states have call successors, (19) [2023-02-16 02:55:49,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 79 transitions. [2023-02-16 02:55:49,241 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 79 transitions. Word has length 29 [2023-02-16 02:55:49,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:55:49,241 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 79 transitions. [2023-02-16 02:55:49,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 02:55:49,241 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 79 transitions. [2023-02-16 02:55:49,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-16 02:55:49,242 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:55:49,242 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:55:49,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-16 02:55:49,242 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:55:49,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:55:49,243 INFO L85 PathProgramCache]: Analyzing trace with hash 2029271682, now seen corresponding path program 1 times [2023-02-16 02:55:49,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:55:49,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606075173] [2023-02-16 02:55:49,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:49,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:55:49,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:49,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:55:49,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:49,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:55:49,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:49,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 02:55:49,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:49,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:49,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:49,451 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 02:55:49,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:55:49,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606075173] [2023-02-16 02:55:49,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606075173] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:55:49,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458147181] [2023-02-16 02:55:49,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:49,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:49,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:55:49,453 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:55:49,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 02:55:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:49,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-16 02:55:49,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:55:49,581 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 02:55:49,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:55:49,920 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 02:55:49,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458147181] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:55:49,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:55:49,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 20 [2023-02-16 02:55:49,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281996237] [2023-02-16 02:55:49,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:55:49,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-16 02:55:49,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:55:49,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-16 02:55:49,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2023-02-16 02:55:49,921 INFO L87 Difference]: Start difference. First operand 63 states and 79 transitions. Second operand has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-16 02:55:50,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:55:50,099 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2023-02-16 02:55:50,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-16 02:55:50,100 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) Word has length 36 [2023-02-16 02:55:50,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:55:50,100 INFO L225 Difference]: With dead ends: 89 [2023-02-16 02:55:50,100 INFO L226 Difference]: Without dead ends: 85 [2023-02-16 02:55:50,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 61 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2023-02-16 02:55:50,101 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 61 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:55:50,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 201 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:55:50,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-02-16 02:55:50,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2023-02-16 02:55:50,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 50 states have (on average 1.12) internal successors, (56), 51 states have internal predecessors, (56), 11 states have call successors, (11), 4 states have call predecessors, (11), 11 states have return successors, (27), 17 states have call predecessors, (27), 11 states have call successors, (27) [2023-02-16 02:55:50,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2023-02-16 02:55:50,107 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 36 [2023-02-16 02:55:50,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:55:50,108 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2023-02-16 02:55:50,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-16 02:55:50,108 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2023-02-16 02:55:50,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-16 02:55:50,108 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:55:50,108 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:55:50,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-16 02:55:50,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:50,314 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:55:50,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:55:50,314 INFO L85 PathProgramCache]: Analyzing trace with hash -122584798, now seen corresponding path program 1 times [2023-02-16 02:55:50,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:55:50,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017995173] [2023-02-16 02:55:50,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:50,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:55:50,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:50,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:55:50,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:50,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:55:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:50,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 02:55:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:50,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:50,510 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-16 02:55:50,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:55:50,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017995173] [2023-02-16 02:55:50,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017995173] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:55:50,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85226743] [2023-02-16 02:55:50,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:50,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:50,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:55:50,512 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:55:50,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 02:55:50,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:50,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-16 02:55:50,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:55:50,656 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-16 02:55:50,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:55:50,835 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-16 02:55:50,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85226743] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:55:50,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:55:50,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 16 [2023-02-16 02:55:50,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559361517] [2023-02-16 02:55:50,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:55:50,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-16 02:55:50,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:55:50,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-16 02:55:50,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-02-16 02:55:50,838 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand has 16 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-16 02:55:50,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:55:50,999 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2023-02-16 02:55:50,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-16 02:55:50,999 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 36 [2023-02-16 02:55:51,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:55:51,000 INFO L225 Difference]: With dead ends: 84 [2023-02-16 02:55:51,000 INFO L226 Difference]: Without dead ends: 75 [2023-02-16 02:55:51,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 65 SyntacticMatches, 10 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2023-02-16 02:55:51,001 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 18 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:55:51,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 145 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:55:51,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-02-16 02:55:51,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2023-02-16 02:55:51,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 51 states have internal predecessors, (55), 11 states have call successors, (11), 4 states have call predecessors, (11), 11 states have return successors, (26), 16 states have call predecessors, (26), 11 states have call successors, (26) [2023-02-16 02:55:51,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2023-02-16 02:55:51,007 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 36 [2023-02-16 02:55:51,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:55:51,007 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2023-02-16 02:55:51,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-16 02:55:51,007 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2023-02-16 02:55:51,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-16 02:55:51,008 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:55:51,008 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:55:51,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-16 02:55:51,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:51,213 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:55:51,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:55:51,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1326914756, now seen corresponding path program 1 times [2023-02-16 02:55:51,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:55:51,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265949187] [2023-02-16 02:55:51,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:51,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:55:51,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:51,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:55:51,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:51,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:55:51,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:51,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:55:51,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:51,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-16 02:55:51,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:51,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-16 02:55:51,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:55:51,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265949187] [2023-02-16 02:55:51,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265949187] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:55:51,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997046411] [2023-02-16 02:55:51,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:51,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:51,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:55:51,394 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:55:51,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 02:55:51,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:51,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-16 02:55:51,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:55:51,614 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-16 02:55:51,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:55:52,108 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-16 02:55:52,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997046411] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:55:52,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:55:52,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 34 [2023-02-16 02:55:52,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892229307] [2023-02-16 02:55:52,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:55:52,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-16 02:55:52,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:55:52,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-16 02:55:52,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1023, Unknown=0, NotChecked=0, Total=1122 [2023-02-16 02:55:52,110 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand has 34 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2023-02-16 02:55:52,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:55:52,637 INFO L93 Difference]: Finished difference Result 121 states and 159 transitions. [2023-02-16 02:55:52,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-16 02:55:52,638 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 37 [2023-02-16 02:55:52,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:55:52,639 INFO L225 Difference]: With dead ends: 121 [2023-02-16 02:55:52,639 INFO L226 Difference]: Without dead ends: 117 [2023-02-16 02:55:52,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=265, Invalid=1805, Unknown=0, NotChecked=0, Total=2070 [2023-02-16 02:55:52,640 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 71 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 02:55:52,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 390 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 02:55:52,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-02-16 02:55:52,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 80. [2023-02-16 02:55:52,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 57 states have internal predecessors, (60), 11 states have call successors, (11), 4 states have call predecessors, (11), 14 states have return successors, (34), 18 states have call predecessors, (34), 11 states have call successors, (34) [2023-02-16 02:55:52,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 105 transitions. [2023-02-16 02:55:52,647 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 105 transitions. Word has length 37 [2023-02-16 02:55:52,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:55:52,647 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 105 transitions. [2023-02-16 02:55:52,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2023-02-16 02:55:52,648 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 105 transitions. [2023-02-16 02:55:52,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-16 02:55:52,648 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:55:52,648 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:55:52,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-16 02:55:52,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-16 02:55:52,853 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:55:52,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:55:52,854 INFO L85 PathProgramCache]: Analyzing trace with hash -238590844, now seen corresponding path program 2 times [2023-02-16 02:55:52,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:55:52,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632262093] [2023-02-16 02:55:52,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:52,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:55:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:52,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:55:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:52,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:55:52,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:52,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:55:52,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:52,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-16 02:55:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:52,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 02:55:52,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:55:52,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632262093] [2023-02-16 02:55:52,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632262093] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:55:52,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411870601] [2023-02-16 02:55:52,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 02:55:52,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:52,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:55:52,994 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:55:53,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 02:55:53,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 02:55:53,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:55:53,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-16 02:55:53,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:55:53,128 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 02:55:53,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:55:53,447 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-16 02:55:53,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411870601] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:55:53,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:55:53,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 21 [2023-02-16 02:55:53,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207428074] [2023-02-16 02:55:53,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:55:53,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-16 02:55:53,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:55:53,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-16 02:55:53,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2023-02-16 02:55:53,449 INFO L87 Difference]: Start difference. First operand 80 states and 105 transitions. Second operand has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 9 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 6 states have call predecessors, (10), 9 states have call successors, (10) [2023-02-16 02:55:53,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:55:53,588 INFO L93 Difference]: Finished difference Result 90 states and 118 transitions. [2023-02-16 02:55:53,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-16 02:55:53,589 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 9 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 6 states have call predecessors, (10), 9 states have call successors, (10) Word has length 37 [2023-02-16 02:55:53,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:55:53,589 INFO L225 Difference]: With dead ends: 90 [2023-02-16 02:55:53,590 INFO L226 Difference]: Without dead ends: 86 [2023-02-16 02:55:53,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 8 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2023-02-16 02:55:53,590 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 33 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:55:53,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 178 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:55:53,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-02-16 02:55:53,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2023-02-16 02:55:53,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 10 states have call successors, (10), 4 states have call predecessors, (10), 9 states have return successors, (19), 13 states have call predecessors, (19), 10 states have call successors, (19) [2023-02-16 02:55:53,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2023-02-16 02:55:53,597 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 37 [2023-02-16 02:55:53,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:55:53,597 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2023-02-16 02:55:53,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 9 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 6 states have call predecessors, (10), 9 states have call successors, (10) [2023-02-16 02:55:53,597 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2023-02-16 02:55:53,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-16 02:55:53,597 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:55:53,597 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:55:53,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-16 02:55:53,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:53,806 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:55:53,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:55:53,806 INFO L85 PathProgramCache]: Analyzing trace with hash -124726374, now seen corresponding path program 2 times [2023-02-16 02:55:53,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:55:53,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239973850] [2023-02-16 02:55:53,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:53,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:55:53,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:53,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:55:53,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:53,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:55:53,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:54,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 02:55:54,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:54,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:54,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:54,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:54,164 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-16 02:55:54,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:55:54,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239973850] [2023-02-16 02:55:54,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239973850] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:55:54,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439988970] [2023-02-16 02:55:54,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 02:55:54,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:54,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:55:54,166 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:55:54,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 02:55:54,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 02:55:54,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:55:54,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-16 02:55:54,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:55:54,350 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-16 02:55:54,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:55:54,624 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 02:55:54,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439988970] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:55:54,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:55:54,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 15] total 24 [2023-02-16 02:55:54,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49092258] [2023-02-16 02:55:54,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:55:54,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-16 02:55:54,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:55:54,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-16 02:55:54,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2023-02-16 02:55:54,625 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand has 24 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2023-02-16 02:55:54,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:55:54,856 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2023-02-16 02:55:54,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-16 02:55:54,856 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) Word has length 43 [2023-02-16 02:55:54,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:55:54,857 INFO L225 Difference]: With dead ends: 76 [2023-02-16 02:55:54,857 INFO L226 Difference]: Without dead ends: 67 [2023-02-16 02:55:54,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 72 SyntacticMatches, 12 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2023-02-16 02:55:54,858 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 34 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:55:54,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 267 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:55:54,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-02-16 02:55:54,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2023-02-16 02:55:54,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 9 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (14), 10 states have call predecessors, (14), 9 states have call successors, (14) [2023-02-16 02:55:54,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2023-02-16 02:55:54,861 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 43 [2023-02-16 02:55:54,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:55:54,861 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2023-02-16 02:55:54,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2023-02-16 02:55:54,861 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2023-02-16 02:55:54,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-16 02:55:54,861 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:55:54,861 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:55:54,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-16 02:55:55,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:55,068 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:55:55,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:55:55,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1996237866, now seen corresponding path program 3 times [2023-02-16 02:55:55,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:55:55,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948440707] [2023-02-16 02:55:55,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:55,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:55:55,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:55,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:55:55,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:55,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:55:55,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:55,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:55:55,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:55,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-16 02:55:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:55,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:55,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:55,342 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-16 02:55:55,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:55:55,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948440707] [2023-02-16 02:55:55,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948440707] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:55:55,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315998762] [2023-02-16 02:55:55,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 02:55:55,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:55,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:55:55,344 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:55:55,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-16 02:55:55,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-16 02:55:55,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:55:55,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-16 02:55:55,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:55:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-16 02:55:55,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:55:56,066 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 02:55:56,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315998762] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:55:56,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:55:56,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 17] total 35 [2023-02-16 02:55:56,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234363696] [2023-02-16 02:55:56,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:55:56,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-16 02:55:56,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:55:56,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-16 02:55:56,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2023-02-16 02:55:56,068 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 35 states, 33 states have (on average 2.272727272727273) internal successors, (75), 28 states have internal predecessors, (75), 14 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-16 02:55:56,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:55:56,298 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2023-02-16 02:55:56,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-16 02:55:56,298 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.272727272727273) internal successors, (75), 28 states have internal predecessors, (75), 14 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) Word has length 44 [2023-02-16 02:55:56,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:55:56,299 INFO L225 Difference]: With dead ends: 86 [2023-02-16 02:55:56,299 INFO L226 Difference]: Without dead ends: 82 [2023-02-16 02:55:56,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 69 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=214, Invalid=1678, Unknown=0, NotChecked=0, Total=1892 [2023-02-16 02:55:56,300 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 62 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:55:56,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 327 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:55:56,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-02-16 02:55:56,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 67. [2023-02-16 02:55:56,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 48 states have internal predecessors, (52), 10 states have call successors, (10), 4 states have call predecessors, (10), 10 states have return successors, (21), 14 states have call predecessors, (21), 10 states have call successors, (21) [2023-02-16 02:55:56,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2023-02-16 02:55:56,303 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 44 [2023-02-16 02:55:56,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:55:56,303 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2023-02-16 02:55:56,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.272727272727273) internal successors, (75), 28 states have internal predecessors, (75), 14 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-16 02:55:56,304 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2023-02-16 02:55:56,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-16 02:55:56,304 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:55:56,304 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:55:56,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-16 02:55:56,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-16 02:55:56,511 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:55:56,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:55:56,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1270773450, now seen corresponding path program 1 times [2023-02-16 02:55:56,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:55:56,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190371870] [2023-02-16 02:55:56,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:56,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:55:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:56,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:55:56,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:56,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:55:56,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:56,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:55:56,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:56,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-16 02:55:56,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:56,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:56,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:56,754 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-16 02:55:56,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:55:56,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190371870] [2023-02-16 02:55:56,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190371870] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:55:56,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2884450] [2023-02-16 02:55:56,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:56,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:56,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:55:56,778 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:55:56,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-16 02:55:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:56,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-16 02:55:56,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:55:57,015 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-16 02:55:57,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:55:57,418 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 02:55:57,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2884450] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:55:57,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:55:57,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 18] total 34 [2023-02-16 02:55:57,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830057968] [2023-02-16 02:55:57,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:55:57,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-16 02:55:57,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:55:57,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-16 02:55:57,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2023-02-16 02:55:57,420 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand has 34 states, 29 states have (on average 2.206896551724138) internal successors, (64), 27 states have internal predecessors, (64), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (13), 9 states have call predecessors, (13), 12 states have call successors, (13) [2023-02-16 02:55:57,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:55:57,776 INFO L93 Difference]: Finished difference Result 103 states and 134 transitions. [2023-02-16 02:55:57,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-16 02:55:57,776 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 2.206896551724138) internal successors, (64), 27 states have internal predecessors, (64), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (13), 9 states have call predecessors, (13), 12 states have call successors, (13) Word has length 44 [2023-02-16 02:55:57,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:55:57,777 INFO L225 Difference]: With dead ends: 103 [2023-02-16 02:55:57,777 INFO L226 Difference]: Without dead ends: 99 [2023-02-16 02:55:57,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 67 SyntacticMatches, 9 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=252, Invalid=1728, Unknown=0, NotChecked=0, Total=1980 [2023-02-16 02:55:57,778 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 43 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 02:55:57,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 430 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 02:55:57,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-02-16 02:55:57,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 70. [2023-02-16 02:55:57,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 10 states have call successors, (10), 4 states have call predecessors, (10), 11 states have return successors, (24), 15 states have call predecessors, (24), 10 states have call successors, (24) [2023-02-16 02:55:57,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2023-02-16 02:55:57,782 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 44 [2023-02-16 02:55:57,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:55:57,782 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2023-02-16 02:55:57,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 2.206896551724138) internal successors, (64), 27 states have internal predecessors, (64), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (13), 9 states have call predecessors, (13), 12 states have call successors, (13) [2023-02-16 02:55:57,783 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2023-02-16 02:55:57,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-16 02:55:57,783 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:55:57,783 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:55:57,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-16 02:55:57,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-16 02:55:57,984 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:55:57,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:55:57,984 INFO L85 PathProgramCache]: Analyzing trace with hash 132450678, now seen corresponding path program 2 times [2023-02-16 02:55:57,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:55:57,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445579773] [2023-02-16 02:55:57,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:57,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:55:57,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:58,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:55:58,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:58,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:55:58,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:58,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:55:58,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:58,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-16 02:55:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:58,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:58,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:58,189 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-16 02:55:58,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:55:58,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445579773] [2023-02-16 02:55:58,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445579773] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:55:58,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740591662] [2023-02-16 02:55:58,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 02:55:58,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:58,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:55:58,207 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:55:58,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-16 02:55:58,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 02:55:58,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:55:58,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-16 02:55:58,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:55:58,373 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-16 02:55:58,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:55:58,871 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 02:55:58,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740591662] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:55:58,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:55:58,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 21 [2023-02-16 02:55:58,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838244439] [2023-02-16 02:55:58,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:55:58,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-16 02:55:58,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:55:58,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-16 02:55:58,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2023-02-16 02:55:58,874 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand has 21 states, 20 states have (on average 2.75) internal successors, (55), 18 states have internal predecessors, (55), 8 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 8 states have call successors, (11) [2023-02-16 02:55:59,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:55:59,045 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2023-02-16 02:55:59,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-16 02:55:59,046 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.75) internal successors, (55), 18 states have internal predecessors, (55), 8 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 8 states have call successors, (11) Word has length 44 [2023-02-16 02:55:59,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:55:59,047 INFO L225 Difference]: With dead ends: 95 [2023-02-16 02:55:59,047 INFO L226 Difference]: Without dead ends: 91 [2023-02-16 02:55:59,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 78 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2023-02-16 02:55:59,048 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 56 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:55:59,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 212 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:55:59,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-16 02:55:59,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 75. [2023-02-16 02:55:59,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 10 states have call successors, (10), 4 states have call predecessors, (10), 12 states have return successors, (27), 18 states have call predecessors, (27), 10 states have call successors, (27) [2023-02-16 02:55:59,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 95 transitions. [2023-02-16 02:55:59,056 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 95 transitions. Word has length 44 [2023-02-16 02:55:59,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:55:59,056 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 95 transitions. [2023-02-16 02:55:59,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.75) internal successors, (55), 18 states have internal predecessors, (55), 8 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 8 states have call successors, (11) [2023-02-16 02:55:59,056 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 95 transitions. [2023-02-16 02:55:59,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-16 02:55:59,057 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:55:59,057 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 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] [2023-02-16 02:55:59,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-02-16 02:55:59,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-16 02:55:59,263 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:55:59,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:55:59,263 INFO L85 PathProgramCache]: Analyzing trace with hash 815065250, now seen corresponding path program 3 times [2023-02-16 02:55:59,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:55:59,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238008149] [2023-02-16 02:55:59,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:59,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:55:59,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:59,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:55:59,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:59,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:55:59,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:59,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:55:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:59,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:55:59,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:59,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 02:55:59,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:59,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:59,529 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-16 02:55:59,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:55:59,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238008149] [2023-02-16 02:55:59,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238008149] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:55:59,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222443076] [2023-02-16 02:55:59,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 02:55:59,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:59,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:55:59,545 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:55:59,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-16 02:55:59,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-16 02:55:59,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:55:59,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-16 02:55:59,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:55:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-16 02:55:59,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:56:01,223 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-16 02:56:01,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222443076] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:56:01,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:56:01,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 20] total 44 [2023-02-16 02:56:01,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222863269] [2023-02-16 02:56:01,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:56:01,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-16 02:56:01,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:56:01,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-16 02:56:01,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1750, Unknown=0, NotChecked=0, Total=1892 [2023-02-16 02:56:01,225 INFO L87 Difference]: Start difference. First operand 75 states and 95 transitions. Second operand has 44 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 32 states have internal predecessors, (89), 16 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (18), 14 states have call predecessors, (18), 16 states have call successors, (18) [2023-02-16 02:56:01,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:56:01,760 INFO L93 Difference]: Finished difference Result 123 states and 157 transitions. [2023-02-16 02:56:01,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-16 02:56:01,760 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 32 states have internal predecessors, (89), 16 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (18), 14 states have call predecessors, (18), 16 states have call successors, (18) Word has length 52 [2023-02-16 02:56:01,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:56:01,761 INFO L225 Difference]: With dead ends: 123 [2023-02-16 02:56:01,761 INFO L226 Difference]: Without dead ends: 119 [2023-02-16 02:56:01,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=329, Invalid=2977, Unknown=0, NotChecked=0, Total=3306 [2023-02-16 02:56:01,762 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 02:56:01,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 433 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 02:56:01,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-02-16 02:56:01,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 80. [2023-02-16 02:56:01,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 54 states have internal predecessors, (62), 10 states have call successors, (10), 4 states have call predecessors, (10), 13 states have return successors, (30), 21 states have call predecessors, (30), 10 states have call successors, (30) [2023-02-16 02:56:01,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 102 transitions. [2023-02-16 02:56:01,768 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 102 transitions. Word has length 52 [2023-02-16 02:56:01,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:56:01,768 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 102 transitions. [2023-02-16 02:56:01,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 32 states have internal predecessors, (89), 16 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (18), 14 states have call predecessors, (18), 16 states have call successors, (18) [2023-02-16 02:56:01,769 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 102 transitions. [2023-02-16 02:56:01,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-16 02:56:01,769 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:56:01,769 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 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] [2023-02-16 02:56:01,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-16 02:56:01,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-16 02:56:01,986 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:56:01,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:56:01,986 INFO L85 PathProgramCache]: Analyzing trace with hash 850048834, now seen corresponding path program 4 times [2023-02-16 02:56:01,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:56:01,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79775464] [2023-02-16 02:56:01,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:56:01,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:56:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:02,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:56:02,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:02,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:02,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:02,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:02,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:02,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 02:56:02,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:02,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:02,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:02,237 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-16 02:56:02,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:56:02,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79775464] [2023-02-16 02:56:02,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79775464] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:56:02,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312409332] [2023-02-16 02:56:02,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 02:56:02,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:56:02,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:56:02,253 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:56:02,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-16 02:56:02,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 02:56:02,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:56:02,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-16 02:56:02,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:56:02,557 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-16 02:56:02,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:56:03,409 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-16 02:56:03,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312409332] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:56:03,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:56:03,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 21] total 37 [2023-02-16 02:56:03,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822867758] [2023-02-16 02:56:03,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:56:03,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-16 02:56:03,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:56:03,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-16 02:56:03,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1204, Unknown=0, NotChecked=0, Total=1332 [2023-02-16 02:56:03,412 INFO L87 Difference]: Start difference. First operand 80 states and 102 transitions. Second operand has 37 states, 32 states have (on average 2.25) internal successors, (72), 28 states have internal predecessors, (72), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (16), 11 states have call predecessors, (16), 13 states have call successors, (16) [2023-02-16 02:56:03,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:56:03,976 INFO L93 Difference]: Finished difference Result 141 states and 187 transitions. [2023-02-16 02:56:03,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-16 02:56:03,979 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 32 states have (on average 2.25) internal successors, (72), 28 states have internal predecessors, (72), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (16), 11 states have call predecessors, (16), 13 states have call successors, (16) Word has length 52 [2023-02-16 02:56:03,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:56:03,980 INFO L225 Difference]: With dead ends: 141 [2023-02-16 02:56:03,980 INFO L226 Difference]: Without dead ends: 137 [2023-02-16 02:56:03,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 82 SyntacticMatches, 11 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=351, Invalid=2301, Unknown=0, NotChecked=0, Total=2652 [2023-02-16 02:56:03,981 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 40 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 02:56:03,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 477 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 02:56:03,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-02-16 02:56:03,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 80. [2023-02-16 02:56:03,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 54 states have internal predecessors, (62), 10 states have call successors, (10), 4 states have call predecessors, (10), 13 states have return successors, (30), 21 states have call predecessors, (30), 10 states have call successors, (30) [2023-02-16 02:56:03,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 102 transitions. [2023-02-16 02:56:03,989 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 102 transitions. Word has length 52 [2023-02-16 02:56:03,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:56:03,989 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 102 transitions. [2023-02-16 02:56:03,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 32 states have (on average 2.25) internal successors, (72), 28 states have internal predecessors, (72), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (16), 11 states have call predecessors, (16), 13 states have call successors, (16) [2023-02-16 02:56:03,990 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 102 transitions. [2023-02-16 02:56:03,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-16 02:56:03,990 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:56:03,990 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 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] [2023-02-16 02:56:04,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-16 02:56:04,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:56:04,195 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:56:04,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:56:04,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1543204190, now seen corresponding path program 5 times [2023-02-16 02:56:04,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:56:04,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268948407] [2023-02-16 02:56:04,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:56:04,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:56:04,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:04,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:56:04,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:04,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:04,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:04,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:04,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:04,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:04,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 02:56:04,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:04,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:04,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:04,545 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-16 02:56:04,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:56:04,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268948407] [2023-02-16 02:56:04,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268948407] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:56:04,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708632589] [2023-02-16 02:56:04,545 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 02:56:04,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:56:04,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:56:04,547 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:56:04,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-16 02:56:04,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-16 02:56:04,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:56:04,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-16 02:56:04,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:56:04,841 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-16 02:56:04,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:56:05,820 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-16 02:56:05,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708632589] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:56:05,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:56:05,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 22] total 41 [2023-02-16 02:56:05,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340561742] [2023-02-16 02:56:05,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:56:05,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-16 02:56:05,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:56:05,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-16 02:56:05,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1496, Unknown=0, NotChecked=0, Total=1640 [2023-02-16 02:56:05,822 INFO L87 Difference]: Start difference. First operand 80 states and 102 transitions. Second operand has 41 states, 33 states have (on average 2.272727272727273) internal successors, (75), 33 states have internal predecessors, (75), 15 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 10 states have call predecessors, (17), 15 states have call successors, (17) [2023-02-16 02:56:06,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:56:06,294 INFO L93 Difference]: Finished difference Result 151 states and 203 transitions. [2023-02-16 02:56:06,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-16 02:56:06,294 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 33 states have (on average 2.272727272727273) internal successors, (75), 33 states have internal predecessors, (75), 15 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 10 states have call predecessors, (17), 15 states have call successors, (17) Word has length 52 [2023-02-16 02:56:06,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:56:06,295 INFO L225 Difference]: With dead ends: 151 [2023-02-16 02:56:06,295 INFO L226 Difference]: Without dead ends: 147 [2023-02-16 02:56:06,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 80 SyntacticMatches, 11 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=323, Invalid=2329, Unknown=0, NotChecked=0, Total=2652 [2023-02-16 02:56:06,297 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 64 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 02:56:06,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 505 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 02:56:06,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-02-16 02:56:06,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 97. [2023-02-16 02:56:06,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 states have internal predecessors, (73), 10 states have call successors, (10), 4 states have call predecessors, (10), 19 states have return successors, (47), 26 states have call predecessors, (47), 10 states have call successors, (47) [2023-02-16 02:56:06,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 130 transitions. [2023-02-16 02:56:06,302 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 130 transitions. Word has length 52 [2023-02-16 02:56:06,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:56:06,303 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 130 transitions. [2023-02-16 02:56:06,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 33 states have (on average 2.272727272727273) internal successors, (75), 33 states have internal predecessors, (75), 15 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 10 states have call predecessors, (17), 15 states have call successors, (17) [2023-02-16 02:56:06,303 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 130 transitions. [2023-02-16 02:56:06,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-16 02:56:06,303 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:56:06,303 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 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] [2023-02-16 02:56:06,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-16 02:56:06,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-02-16 02:56:06,504 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:56:06,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:56:06,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1009898910, now seen corresponding path program 6 times [2023-02-16 02:56:06,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:56:06,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559371287] [2023-02-16 02:56:06,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:56:06,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:56:06,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:06,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:56:06,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:06,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:06,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:06,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:06,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:06,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:06,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:06,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 02:56:06,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:06,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:06,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:06,797 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-16 02:56:06,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:56:06,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559371287] [2023-02-16 02:56:06,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559371287] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:56:06,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088775412] [2023-02-16 02:56:06,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 02:56:06,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:56:06,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:56:06,799 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:56:06,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-16 02:56:06,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-16 02:56:06,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:56:06,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-16 02:56:06,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:56:07,202 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-16 02:56:07,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:56:08,543 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-16 02:56:08,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088775412] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:56:08,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:56:08,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 22] total 51 [2023-02-16 02:56:08,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777832922] [2023-02-16 02:56:08,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:56:08,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-02-16 02:56:08,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:56:08,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-02-16 02:56:08,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=2364, Unknown=0, NotChecked=0, Total=2550 [2023-02-16 02:56:08,558 INFO L87 Difference]: Start difference. First operand 97 states and 130 transitions. Second operand has 51 states, 45 states have (on average 2.022222222222222) internal successors, (91), 39 states have internal predecessors, (91), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (18), 14 states have call predecessors, (18), 17 states have call successors, (18) [2023-02-16 02:56:09,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:56:09,407 INFO L93 Difference]: Finished difference Result 209 states and 289 transitions. [2023-02-16 02:56:09,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-16 02:56:09,408 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 45 states have (on average 2.022222222222222) internal successors, (91), 39 states have internal predecessors, (91), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (18), 14 states have call predecessors, (18), 17 states have call successors, (18) Word has length 52 [2023-02-16 02:56:09,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:56:09,411 INFO L225 Difference]: With dead ends: 209 [2023-02-16 02:56:09,411 INFO L226 Difference]: Without dead ends: 205 [2023-02-16 02:56:09,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=492, Invalid=4200, Unknown=0, NotChecked=0, Total=4692 [2023-02-16 02:56:09,413 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 117 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 02:56:09,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 447 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 02:56:09,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-02-16 02:56:09,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 97. [2023-02-16 02:56:09,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 states have internal predecessors, (73), 10 states have call successors, (10), 4 states have call predecessors, (10), 19 states have return successors, (47), 26 states have call predecessors, (47), 10 states have call successors, (47) [2023-02-16 02:56:09,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 130 transitions. [2023-02-16 02:56:09,420 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 130 transitions. Word has length 52 [2023-02-16 02:56:09,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:56:09,420 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 130 transitions. [2023-02-16 02:56:09,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 45 states have (on average 2.022222222222222) internal successors, (91), 39 states have internal predecessors, (91), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (18), 14 states have call predecessors, (18), 17 states have call successors, (18) [2023-02-16 02:56:09,420 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 130 transitions. [2023-02-16 02:56:09,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-16 02:56:09,421 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:56:09,421 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:56:09,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-16 02:56:09,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:56:09,626 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:56:09,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:56:09,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1539510102, now seen corresponding path program 7 times [2023-02-16 02:56:09,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:56:09,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602944396] [2023-02-16 02:56:09,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:56:09,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:56:09,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:09,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:56:09,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:09,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:09,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:09,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:09,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:09,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:09,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:09,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:09,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:09,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-16 02:56:09,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:09,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:09,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:09,997 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-16 02:56:09,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:56:09,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602944396] [2023-02-16 02:56:09,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602944396] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:56:09,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583458983] [2023-02-16 02:56:09,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 02:56:09,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:56:09,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:56:10,013 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) [2023-02-16 02:56:10,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-16 02:56:10,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:10,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-16 02:56:10,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:56:10,356 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-16 02:56:10,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:56:11,693 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 7 proven. 47 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-16 02:56:11,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583458983] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:56:11,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:56:11,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 25] total 43 [2023-02-16 02:56:11,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013088079] [2023-02-16 02:56:11,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:56:11,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-16 02:56:11,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:56:11,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-16 02:56:11,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1652, Unknown=0, NotChecked=0, Total=1806 [2023-02-16 02:56:11,695 INFO L87 Difference]: Start difference. First operand 97 states and 130 transitions. Second operand has 43 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 16 states have call successors, (18), 1 states have call predecessors, (18), 8 states have return successors, (20), 11 states have call predecessors, (20), 16 states have call successors, (20) [2023-02-16 02:56:12,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:56:12,080 INFO L93 Difference]: Finished difference Result 183 states and 250 transitions. [2023-02-16 02:56:12,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-16 02:56:12,080 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 16 states have call successors, (18), 1 states have call predecessors, (18), 8 states have return successors, (20), 11 states have call predecessors, (20), 16 states have call successors, (20) Word has length 60 [2023-02-16 02:56:12,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:56:12,087 INFO L225 Difference]: With dead ends: 183 [2023-02-16 02:56:12,088 INFO L226 Difference]: Without dead ends: 179 [2023-02-16 02:56:12,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 96 SyntacticMatches, 13 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=427, Invalid=2879, Unknown=0, NotChecked=0, Total=3306 [2023-02-16 02:56:12,097 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 64 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 02:56:12,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 531 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 02:56:12,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-02-16 02:56:12,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 94. [2023-02-16 02:56:12,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 states have internal predecessors, (71), 10 states have call successors, (10), 4 states have call predecessors, (10), 18 states have return successors, (44), 25 states have call predecessors, (44), 10 states have call successors, (44) [2023-02-16 02:56:12,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 125 transitions. [2023-02-16 02:56:12,132 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 125 transitions. Word has length 60 [2023-02-16 02:56:12,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:56:12,133 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 125 transitions. [2023-02-16 02:56:12,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 16 states have call successors, (18), 1 states have call predecessors, (18), 8 states have return successors, (20), 11 states have call predecessors, (20), 16 states have call successors, (20) [2023-02-16 02:56:12,133 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 125 transitions. [2023-02-16 02:56:12,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-16 02:56:12,137 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:56:12,137 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:56:12,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-02-16 02:56:12,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:56:12,338 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:56:12,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:56:12,338 INFO L85 PathProgramCache]: Analyzing trace with hash 368513814, now seen corresponding path program 8 times [2023-02-16 02:56:12,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:56:12,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445437714] [2023-02-16 02:56:12,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:56:12,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:56:12,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:12,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:56:12,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:12,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:12,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:12,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:12,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:12,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:12,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:12,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-16 02:56:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:12,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:12,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-16 02:56:12,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:56:12,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445437714] [2023-02-16 02:56:12,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445437714] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:56:12,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833361792] [2023-02-16 02:56:12,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 02:56:12,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:56:12,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:56:12,702 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:56:12,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-16 02:56:12,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 02:56:12,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:56:12,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-16 02:56:12,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:56:13,325 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 19 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-16 02:56:13,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:56:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-16 02:56:15,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833361792] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:56:15,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:56:15,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 26] total 59 [2023-02-16 02:56:15,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873024302] [2023-02-16 02:56:15,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:56:15,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-02-16 02:56:15,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:56:15,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-02-16 02:56:15,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=3182, Unknown=0, NotChecked=0, Total=3422 [2023-02-16 02:56:15,234 INFO L87 Difference]: Start difference. First operand 94 states and 125 transitions. Second operand has 59 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 46 states have internal predecessors, (97), 19 states have call successors, (19), 1 states have call predecessors, (19), 14 states have return successors, (21), 15 states have call predecessors, (21), 19 states have call successors, (21) [2023-02-16 02:56:16,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:56:16,160 INFO L93 Difference]: Finished difference Result 188 states and 260 transitions. [2023-02-16 02:56:16,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-16 02:56:16,161 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 46 states have internal predecessors, (97), 19 states have call successors, (19), 1 states have call predecessors, (19), 14 states have return successors, (21), 15 states have call predecessors, (21), 19 states have call successors, (21) Word has length 60 [2023-02-16 02:56:16,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:56:16,162 INFO L225 Difference]: With dead ends: 188 [2023-02-16 02:56:16,162 INFO L226 Difference]: Without dead ends: 184 [2023-02-16 02:56:16,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 7 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=779, Invalid=5541, Unknown=0, NotChecked=0, Total=6320 [2023-02-16 02:56:16,164 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 106 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 1104 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 02:56:16,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 603 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1104 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 02:56:16,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-02-16 02:56:16,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 93. [2023-02-16 02:56:16,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 64 states have (on average 1.09375) internal successors, (70), 64 states have internal predecessors, (70), 10 states have call successors, (10), 4 states have call predecessors, (10), 18 states have return successors, (44), 24 states have call predecessors, (44), 10 states have call successors, (44) [2023-02-16 02:56:16,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2023-02-16 02:56:16,173 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 124 transitions. Word has length 60 [2023-02-16 02:56:16,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:56:16,173 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 124 transitions. [2023-02-16 02:56:16,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 46 states have internal predecessors, (97), 19 states have call successors, (19), 1 states have call predecessors, (19), 14 states have return successors, (21), 15 states have call predecessors, (21), 19 states have call successors, (21) [2023-02-16 02:56:16,174 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 124 transitions. [2023-02-16 02:56:16,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-16 02:56:16,174 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:56:16,174 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:56:16,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-16 02:56:16,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-02-16 02:56:16,380 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:56:16,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:56:16,381 INFO L85 PathProgramCache]: Analyzing trace with hash 861262790, now seen corresponding path program 4 times [2023-02-16 02:56:16,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:56:16,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891632181] [2023-02-16 02:56:16,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:56:16,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:56:16,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:16,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:56:16,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:16,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:16,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:16,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:16,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:16,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-16 02:56:16,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:16,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:16,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:16,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-16 02:56:16,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:56:16,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891632181] [2023-02-16 02:56:16,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891632181] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:56:16,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099833849] [2023-02-16 02:56:16,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 02:56:16,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:56:16,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:56:16,625 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:56:16,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-16 02:56:16,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 02:56:16,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:56:16,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-16 02:56:16,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:56:16,892 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-16 02:56:16,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:56:17,671 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-16 02:56:17,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099833849] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:56:17,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:56:17,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 18] total 27 [2023-02-16 02:56:17,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419842311] [2023-02-16 02:56:17,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:56:17,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-16 02:56:17,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:56:17,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-16 02:56:17,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2023-02-16 02:56:17,673 INFO L87 Difference]: Start difference. First operand 93 states and 124 transitions. Second operand has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 7 states have call predecessors, (14), 12 states have call successors, (14) [2023-02-16 02:56:17,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:56:17,939 INFO L93 Difference]: Finished difference Result 121 states and 162 transitions. [2023-02-16 02:56:17,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-16 02:56:17,940 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 7 states have call predecessors, (14), 12 states have call successors, (14) Word has length 51 [2023-02-16 02:56:17,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:56:17,941 INFO L225 Difference]: With dead ends: 121 [2023-02-16 02:56:17,941 INFO L226 Difference]: Without dead ends: 117 [2023-02-16 02:56:17,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 87 SyntacticMatches, 12 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2023-02-16 02:56:17,942 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 37 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 02:56:17,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 362 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 02:56:17,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-02-16 02:56:17,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 104. [2023-02-16 02:56:17,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 71 states have internal predecessors, (77), 11 states have call successors, (11), 4 states have call predecessors, (11), 21 states have return successors, (52), 28 states have call predecessors, (52), 11 states have call successors, (52) [2023-02-16 02:56:17,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 140 transitions. [2023-02-16 02:56:17,948 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 140 transitions. Word has length 51 [2023-02-16 02:56:17,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:56:17,948 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 140 transitions. [2023-02-16 02:56:17,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 7 states have call predecessors, (14), 12 states have call successors, (14) [2023-02-16 02:56:17,949 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 140 transitions. [2023-02-16 02:56:17,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-16 02:56:17,949 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:56:17,949 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 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] [2023-02-16 02:56:17,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-16 02:56:18,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:56:18,155 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:56:18,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:56:18,155 INFO L85 PathProgramCache]: Analyzing trace with hash -2103225754, now seen corresponding path program 9 times [2023-02-16 02:56:18,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:56:18,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468343528] [2023-02-16 02:56:18,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:56:18,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:56:18,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:18,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:56:18,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:18,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:18,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:18,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:18,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-16 02:56:18,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:18,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:18,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:18,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:18,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:18,395 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-16 02:56:18,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:56:18,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468343528] [2023-02-16 02:56:18,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468343528] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:56:18,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115163650] [2023-02-16 02:56:18,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 02:56:18,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:56:18,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:56:18,413 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:56:18,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-16 02:56:18,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-16 02:56:18,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:56:18,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-16 02:56:18,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:56:18,764 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-16 02:56:18,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:56:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-16 02:56:19,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115163650] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:56:19,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:56:19,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 18] total 27 [2023-02-16 02:56:19,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417683491] [2023-02-16 02:56:19,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:56:19,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-16 02:56:19,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:56:19,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-16 02:56:19,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2023-02-16 02:56:19,494 INFO L87 Difference]: Start difference. First operand 104 states and 140 transitions. Second operand has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 7 states have call predecessors, (14), 12 states have call successors, (14) [2023-02-16 02:56:19,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:56:19,706 INFO L93 Difference]: Finished difference Result 123 states and 162 transitions. [2023-02-16 02:56:19,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-16 02:56:19,706 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 7 states have call predecessors, (14), 12 states have call successors, (14) Word has length 51 [2023-02-16 02:56:19,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:56:19,708 INFO L225 Difference]: With dead ends: 123 [2023-02-16 02:56:19,708 INFO L226 Difference]: Without dead ends: 119 [2023-02-16 02:56:19,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 86 SyntacticMatches, 13 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2023-02-16 02:56:19,709 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 27 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 02:56:19,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 360 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 02:56:19,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-02-16 02:56:19,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 104. [2023-02-16 02:56:19,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 71 states have internal predecessors, (77), 11 states have call successors, (11), 4 states have call predecessors, (11), 21 states have return successors, (52), 28 states have call predecessors, (52), 11 states have call successors, (52) [2023-02-16 02:56:19,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 140 transitions. [2023-02-16 02:56:19,720 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 140 transitions. Word has length 51 [2023-02-16 02:56:19,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:56:19,721 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 140 transitions. [2023-02-16 02:56:19,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 7 states have call predecessors, (14), 12 states have call successors, (14) [2023-02-16 02:56:19,721 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 140 transitions. [2023-02-16 02:56:19,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-16 02:56:19,722 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:56:19,722 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 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] [2023-02-16 02:56:19,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-16 02:56:19,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:56:19,927 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:56:19,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:56:19,928 INFO L85 PathProgramCache]: Analyzing trace with hash -262469082, now seen corresponding path program 10 times [2023-02-16 02:56:19,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:56:19,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384654131] [2023-02-16 02:56:19,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:56:19,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:56:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:19,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:56:20,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:20,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:20,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:20,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:20,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-16 02:56:20,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:20,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:20,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:20,181 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-16 02:56:20,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:56:20,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384654131] [2023-02-16 02:56:20,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384654131] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:56:20,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495781639] [2023-02-16 02:56:20,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 02:56:20,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:56:20,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:56:20,183 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:56:20,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-16 02:56:20,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 02:56:20,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:56:20,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-16 02:56:20,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:56:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-16 02:56:20,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:56:21,110 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-16 02:56:21,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495781639] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:56:21,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:56:21,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 34 [2023-02-16 02:56:21,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183986587] [2023-02-16 02:56:21,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:56:21,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-16 02:56:21,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:56:21,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-16 02:56:21,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2023-02-16 02:56:21,112 INFO L87 Difference]: Start difference. First operand 104 states and 140 transitions. Second operand has 34 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (16), 9 states have call predecessors, (16), 12 states have call successors, (16) [2023-02-16 02:56:21,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:56:21,442 INFO L93 Difference]: Finished difference Result 120 states and 161 transitions. [2023-02-16 02:56:21,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-16 02:56:21,442 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (16), 9 states have call predecessors, (16), 12 states have call successors, (16) Word has length 51 [2023-02-16 02:56:21,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:56:21,443 INFO L225 Difference]: With dead ends: 120 [2023-02-16 02:56:21,443 INFO L226 Difference]: Without dead ends: 111 [2023-02-16 02:56:21,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 82 SyntacticMatches, 12 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2023-02-16 02:56:21,444 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 73 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 02:56:21,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 284 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 02:56:21,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-02-16 02:56:21,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2023-02-16 02:56:21,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 74 states have (on average 1.0810810810810811) internal successors, (80), 73 states have internal predecessors, (80), 11 states have call successors, (11), 4 states have call predecessors, (11), 22 states have return successors, (54), 30 states have call predecessors, (54), 11 states have call successors, (54) [2023-02-16 02:56:21,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 145 transitions. [2023-02-16 02:56:21,450 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 145 transitions. Word has length 51 [2023-02-16 02:56:21,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:56:21,450 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 145 transitions. [2023-02-16 02:56:21,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (16), 9 states have call predecessors, (16), 12 states have call successors, (16) [2023-02-16 02:56:21,450 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 145 transitions. [2023-02-16 02:56:21,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-16 02:56:21,451 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:56:21,451 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:56:21,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-02-16 02:56:21,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:56:21,656 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:56:21,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:56:21,656 INFO L85 PathProgramCache]: Analyzing trace with hash 334535194, now seen corresponding path program 5 times [2023-02-16 02:56:21,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:56:21,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311088118] [2023-02-16 02:56:21,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:56:21,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:56:21,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:21,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:56:21,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:21,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:21,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:21,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:21,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:21,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:21,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 02:56:21,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:21,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:21,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:21,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:21,979 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-16 02:56:21,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:56:21,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311088118] [2023-02-16 02:56:21,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311088118] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:56:21,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697821831] [2023-02-16 02:56:21,980 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 02:56:21,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:56:21,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:56:21,997 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:56:22,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-16 02:56:22,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-16 02:56:22,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:56:22,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-16 02:56:22,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:56:22,464 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-16 02:56:22,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:56:24,189 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 02:56:24,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697821831] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:56:24,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:56:24,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 22] total 45 [2023-02-16 02:56:24,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943158217] [2023-02-16 02:56:24,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:56:24,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-16 02:56:24,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:56:24,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-16 02:56:24,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1823, Unknown=0, NotChecked=0, Total=1980 [2023-02-16 02:56:24,193 INFO L87 Difference]: Start difference. First operand 108 states and 145 transitions. Second operand has 45 states, 42 states have (on average 2.142857142857143) internal successors, (90), 34 states have internal predecessors, (90), 17 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (21), 14 states have call predecessors, (21), 17 states have call successors, (21) [2023-02-16 02:56:24,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:56:24,773 INFO L93 Difference]: Finished difference Result 144 states and 190 transitions. [2023-02-16 02:56:24,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-16 02:56:24,774 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 2.142857142857143) internal successors, (90), 34 states have internal predecessors, (90), 17 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (21), 14 states have call predecessors, (21), 17 states have call successors, (21) Word has length 59 [2023-02-16 02:56:24,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:56:24,775 INFO L225 Difference]: With dead ends: 144 [2023-02-16 02:56:24,775 INFO L226 Difference]: Without dead ends: 140 [2023-02-16 02:56:24,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 94 SyntacticMatches, 8 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=315, Invalid=2655, Unknown=0, NotChecked=0, Total=2970 [2023-02-16 02:56:24,776 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 76 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 02:56:24,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 562 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 02:56:24,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-02-16 02:56:24,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 108. [2023-02-16 02:56:24,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 74 states have (on average 1.0810810810810811) internal successors, (80), 73 states have internal predecessors, (80), 11 states have call successors, (11), 4 states have call predecessors, (11), 22 states have return successors, (54), 30 states have call predecessors, (54), 11 states have call successors, (54) [2023-02-16 02:56:24,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 145 transitions. [2023-02-16 02:56:24,781 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 145 transitions. Word has length 59 [2023-02-16 02:56:24,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:56:24,781 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 145 transitions. [2023-02-16 02:56:24,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 2.142857142857143) internal successors, (90), 34 states have internal predecessors, (90), 17 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (21), 14 states have call predecessors, (21), 17 states have call successors, (21) [2023-02-16 02:56:24,782 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 145 transitions. [2023-02-16 02:56:24,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-16 02:56:24,782 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:56:24,782 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:56:24,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-16 02:56:24,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-16 02:56:24,987 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:56:24,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:56:24,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1972765050, now seen corresponding path program 11 times [2023-02-16 02:56:24,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:56:24,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103729788] [2023-02-16 02:56:24,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:56:24,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:56:24,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:25,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:56:25,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:25,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:25,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:25,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:25,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:25,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:25,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 02:56:25,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:25,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:25,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:25,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:25,261 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-16 02:56:25,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:56:25,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103729788] [2023-02-16 02:56:25,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103729788] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:56:25,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608937986] [2023-02-16 02:56:25,262 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 02:56:25,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:56:25,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:56:25,287 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:56:25,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-16 02:56:25,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-16 02:56:25,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:56:25,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-16 02:56:25,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:56:25,595 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-16 02:56:25,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:56:26,690 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-16 02:56:26,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608937986] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:56:26,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:56:26,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 19] total 28 [2023-02-16 02:56:26,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56019895] [2023-02-16 02:56:26,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:56:26,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-16 02:56:26,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:56:26,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-16 02:56:26,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2023-02-16 02:56:26,692 INFO L87 Difference]: Start difference. First operand 108 states and 145 transitions. Second operand has 28 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 23 states have internal predecessors, (72), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 8 states have call predecessors, (17), 12 states have call successors, (17) [2023-02-16 02:56:26,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:56:26,979 INFO L93 Difference]: Finished difference Result 141 states and 188 transitions. [2023-02-16 02:56:26,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-16 02:56:26,980 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 23 states have internal predecessors, (72), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 8 states have call predecessors, (17), 12 states have call successors, (17) Word has length 59 [2023-02-16 02:56:26,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:56:26,981 INFO L225 Difference]: With dead ends: 141 [2023-02-16 02:56:26,981 INFO L226 Difference]: Without dead ends: 137 [2023-02-16 02:56:26,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 103 SyntacticMatches, 15 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2023-02-16 02:56:26,981 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 60 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 02:56:26,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 378 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 02:56:26,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-02-16 02:56:26,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 116. [2023-02-16 02:56:26,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 80 states have (on average 1.075) internal successors, (86), 77 states have internal predecessors, (86), 11 states have call successors, (11), 4 states have call predecessors, (11), 24 states have return successors, (60), 34 states have call predecessors, (60), 11 states have call successors, (60) [2023-02-16 02:56:26,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 157 transitions. [2023-02-16 02:56:26,987 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 157 transitions. Word has length 59 [2023-02-16 02:56:26,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:56:26,987 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 157 transitions. [2023-02-16 02:56:26,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 23 states have internal predecessors, (72), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 8 states have call predecessors, (17), 12 states have call successors, (17) [2023-02-16 02:56:26,988 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 157 transitions. [2023-02-16 02:56:26,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-16 02:56:26,988 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:56:26,988 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:56:26,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-16 02:56:27,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-16 02:56:27,193 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:56:27,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:56:27,194 INFO L85 PathProgramCache]: Analyzing trace with hash 12091098, now seen corresponding path program 12 times [2023-02-16 02:56:27,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:56:27,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708406178] [2023-02-16 02:56:27,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:56:27,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:56:27,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:27,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:56:27,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:27,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:27,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:27,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:27,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:27,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:27,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 02:56:27,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:27,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:27,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:27,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:27,444 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-16 02:56:27,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:56:27,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708406178] [2023-02-16 02:56:27,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708406178] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:56:27,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593315331] [2023-02-16 02:56:27,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 02:56:27,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:56:27,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:56:27,447 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:56:27,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-16 02:56:27,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-16 02:56:27,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:56:27,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-16 02:56:27,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:56:27,764 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-16 02:56:27,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:56:28,806 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-16 02:56:28,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593315331] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:56:28,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:56:28,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 19] total 28 [2023-02-16 02:56:28,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971369967] [2023-02-16 02:56:28,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:56:28,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-16 02:56:28,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:56:28,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-16 02:56:28,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2023-02-16 02:56:28,809 INFO L87 Difference]: Start difference. First operand 116 states and 157 transitions. Second operand has 28 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 23 states have internal predecessors, (72), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 8 states have call predecessors, (17), 12 states have call successors, (17) [2023-02-16 02:56:29,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:56:29,098 INFO L93 Difference]: Finished difference Result 149 states and 200 transitions. [2023-02-16 02:56:29,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-16 02:56:29,099 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 23 states have internal predecessors, (72), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 8 states have call predecessors, (17), 12 states have call successors, (17) Word has length 59 [2023-02-16 02:56:29,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:56:29,100 INFO L225 Difference]: With dead ends: 149 [2023-02-16 02:56:29,100 INFO L226 Difference]: Without dead ends: 145 [2023-02-16 02:56:29,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 102 SyntacticMatches, 16 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2023-02-16 02:56:29,101 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 40 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 02:56:29,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 402 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 02:56:29,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-02-16 02:56:29,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 119. [2023-02-16 02:56:29,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 79 states have internal predecessors, (88), 11 states have call successors, (11), 4 states have call predecessors, (11), 25 states have return successors, (63), 35 states have call predecessors, (63), 11 states have call successors, (63) [2023-02-16 02:56:29,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 162 transitions. [2023-02-16 02:56:29,107 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 162 transitions. Word has length 59 [2023-02-16 02:56:29,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:56:29,107 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 162 transitions. [2023-02-16 02:56:29,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 23 states have internal predecessors, (72), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 8 states have call predecessors, (17), 12 states have call successors, (17) [2023-02-16 02:56:29,107 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 162 transitions. [2023-02-16 02:56:29,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-16 02:56:29,108 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:56:29,108 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:56:29,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-16 02:56:29,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-16 02:56:29,313 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:56:29,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:56:29,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1626138758, now seen corresponding path program 13 times [2023-02-16 02:56:29,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:56:29,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787679170] [2023-02-16 02:56:29,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:56:29,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:56:29,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:29,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:56:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:29,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:29,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:29,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:29,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:29,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:29,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:29,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 02:56:29,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:29,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:29,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:29,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:29,589 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-16 02:56:29,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:56:29,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787679170] [2023-02-16 02:56:29,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787679170] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:56:29,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217481279] [2023-02-16 02:56:29,590 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 02:56:29,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:56:29,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:56:29,606 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:56:29,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-16 02:56:29,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:29,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-16 02:56:29,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:56:29,954 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-16 02:56:29,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:56:30,868 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 02:56:30,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217481279] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:56:30,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:56:30,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 23] total 42 [2023-02-16 02:56:30,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300488814] [2023-02-16 02:56:30,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:56:30,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-16 02:56:30,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:56:30,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-16 02:56:30,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1564, Unknown=0, NotChecked=0, Total=1722 [2023-02-16 02:56:30,872 INFO L87 Difference]: Start difference. First operand 119 states and 162 transitions. Second operand has 42 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 33 states have internal predecessors, (80), 16 states have call successors, (16), 1 states have call predecessors, (16), 10 states have return successors, (20), 12 states have call predecessors, (20), 16 states have call successors, (20) [2023-02-16 02:56:31,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:56:31,509 INFO L93 Difference]: Finished difference Result 186 states and 258 transitions. [2023-02-16 02:56:31,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-16 02:56:31,510 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 33 states have internal predecessors, (80), 16 states have call successors, (16), 1 states have call predecessors, (16), 10 states have return successors, (20), 12 states have call predecessors, (20), 16 states have call successors, (20) Word has length 59 [2023-02-16 02:56:31,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:56:31,511 INFO L225 Difference]: With dead ends: 186 [2023-02-16 02:56:31,511 INFO L226 Difference]: Without dead ends: 182 [2023-02-16 02:56:31,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 95 SyntacticMatches, 12 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=2352, Unknown=0, NotChecked=0, Total=2652 [2023-02-16 02:56:31,512 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 48 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 02:56:31,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 657 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 02:56:31,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-02-16 02:56:31,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 131. [2023-02-16 02:56:31,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 90 states have (on average 1.0666666666666667) internal successors, (96), 87 states have internal predecessors, (96), 11 states have call successors, (11), 4 states have call predecessors, (11), 29 states have return successors, (75), 39 states have call predecessors, (75), 11 states have call successors, (75) [2023-02-16 02:56:31,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 182 transitions. [2023-02-16 02:56:31,520 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 182 transitions. Word has length 59 [2023-02-16 02:56:31,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:56:31,520 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 182 transitions. [2023-02-16 02:56:31,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 33 states have internal predecessors, (80), 16 states have call successors, (16), 1 states have call predecessors, (16), 10 states have return successors, (20), 12 states have call predecessors, (20), 16 states have call successors, (20) [2023-02-16 02:56:31,520 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 182 transitions. [2023-02-16 02:56:31,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-16 02:56:31,521 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:56:31,521 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:56:31,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-16 02:56:31,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:56:31,722 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:56:31,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:56:31,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1786558534, now seen corresponding path program 14 times [2023-02-16 02:56:31,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:56:31,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336595731] [2023-02-16 02:56:31,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:56:31,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:56:31,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:31,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:56:31,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:31,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:31,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:31,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:31,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:31,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 02:56:31,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:32,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:32,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:32,092 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-16 02:56:32,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:56:32,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336595731] [2023-02-16 02:56:32,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336595731] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:56:32,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310400191] [2023-02-16 02:56:32,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 02:56:32,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:56:32,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:56:32,096 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:56:32,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-16 02:56:32,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 02:56:32,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:56:32,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-16 02:56:32,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:56:32,646 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 13 proven. 20 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-16 02:56:32,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:56:34,031 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 02:56:34,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310400191] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:56:34,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:56:34,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 24] total 50 [2023-02-16 02:56:34,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815870272] [2023-02-16 02:56:34,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:56:34,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-16 02:56:34,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:56:34,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-16 02:56:34,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2265, Unknown=0, NotChecked=0, Total=2450 [2023-02-16 02:56:34,033 INFO L87 Difference]: Start difference. First operand 131 states and 182 transitions. Second operand has 50 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 39 states have internal predecessors, (90), 17 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (21), 14 states have call predecessors, (21), 17 states have call successors, (21) [2023-02-16 02:56:34,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:56:34,732 INFO L93 Difference]: Finished difference Result 174 states and 240 transitions. [2023-02-16 02:56:34,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-16 02:56:34,732 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 39 states have internal predecessors, (90), 17 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (21), 14 states have call predecessors, (21), 17 states have call successors, (21) Word has length 59 [2023-02-16 02:56:34,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:56:34,733 INFO L225 Difference]: With dead ends: 174 [2023-02-16 02:56:34,733 INFO L226 Difference]: Without dead ends: 170 [2023-02-16 02:56:34,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=417, Invalid=3489, Unknown=0, NotChecked=0, Total=3906 [2023-02-16 02:56:34,734 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 65 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 02:56:34,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 738 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 02:56:34,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-02-16 02:56:34,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 128. [2023-02-16 02:56:34,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 88 states have (on average 1.0681818181818181) internal successors, (94), 85 states have internal predecessors, (94), 11 states have call successors, (11), 4 states have call predecessors, (11), 28 states have return successors, (72), 38 states have call predecessors, (72), 11 states have call successors, (72) [2023-02-16 02:56:34,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 177 transitions. [2023-02-16 02:56:34,741 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 177 transitions. Word has length 59 [2023-02-16 02:56:34,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:56:34,742 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 177 transitions. [2023-02-16 02:56:34,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 39 states have internal predecessors, (90), 17 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (21), 14 states have call predecessors, (21), 17 states have call successors, (21) [2023-02-16 02:56:34,742 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 177 transitions. [2023-02-16 02:56:34,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-16 02:56:34,742 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:56:34,743 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:56:34,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-16 02:56:34,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:56:34,943 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:56:34,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:56:34,944 INFO L85 PathProgramCache]: Analyzing trace with hash 547734810, now seen corresponding path program 15 times [2023-02-16 02:56:34,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:56:34,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662345076] [2023-02-16 02:56:34,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:56:34,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:56:34,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:34,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:56:34,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:35,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:35,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:35,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:35,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:35,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:35,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 02:56:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:35,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:35,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:35,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:35,217 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-16 02:56:35,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:56:35,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662345076] [2023-02-16 02:56:35,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662345076] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:56:35,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598909985] [2023-02-16 02:56:35,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 02:56:35,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:56:35,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:56:35,223 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:56:35,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-16 02:56:35,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-16 02:56:35,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:56:35,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-16 02:56:35,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:56:35,665 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-16 02:56:35,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:56:36,920 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 02:56:36,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598909985] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:56:36,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:56:36,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 22] total 46 [2023-02-16 02:56:36,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874903116] [2023-02-16 02:56:36,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:56:36,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-16 02:56:36,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:56:36,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-16 02:56:36,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1926, Unknown=0, NotChecked=0, Total=2070 [2023-02-16 02:56:36,922 INFO L87 Difference]: Start difference. First operand 128 states and 177 transitions. Second operand has 46 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 35 states have internal predecessors, (93), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (20), 14 states have call predecessors, (20), 17 states have call successors, (20) [2023-02-16 02:56:37,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:56:37,556 INFO L93 Difference]: Finished difference Result 177 states and 244 transitions. [2023-02-16 02:56:37,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-16 02:56:37,556 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 35 states have internal predecessors, (93), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (20), 14 states have call predecessors, (20), 17 states have call successors, (20) Word has length 59 [2023-02-16 02:56:37,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:56:37,560 INFO L225 Difference]: With dead ends: 177 [2023-02-16 02:56:37,560 INFO L226 Difference]: Without dead ends: 173 [2023-02-16 02:56:37,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 93 SyntacticMatches, 8 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=321, Invalid=3219, Unknown=0, NotChecked=0, Total=3540 [2023-02-16 02:56:37,562 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 49 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 1287 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 02:56:37,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 650 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1287 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 02:56:37,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-02-16 02:56:37,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 128. [2023-02-16 02:56:37,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 88 states have (on average 1.0681818181818181) internal successors, (94), 85 states have internal predecessors, (94), 11 states have call successors, (11), 4 states have call predecessors, (11), 28 states have return successors, (72), 38 states have call predecessors, (72), 11 states have call successors, (72) [2023-02-16 02:56:37,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 177 transitions. [2023-02-16 02:56:37,591 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 177 transitions. Word has length 59 [2023-02-16 02:56:37,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:56:37,591 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 177 transitions. [2023-02-16 02:56:37,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 35 states have internal predecessors, (93), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (20), 14 states have call predecessors, (20), 17 states have call successors, (20) [2023-02-16 02:56:37,592 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 177 transitions. [2023-02-16 02:56:37,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-16 02:56:37,594 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:56:37,594 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:56:37,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-16 02:56:37,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-02-16 02:56:37,800 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:56:37,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:56:37,800 INFO L85 PathProgramCache]: Analyzing trace with hash 789094822, now seen corresponding path program 16 times [2023-02-16 02:56:37,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:56:37,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024609138] [2023-02-16 02:56:37,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:56:37,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:56:37,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:37,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:56:37,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:37,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:37,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:37,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:37,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:37,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:37,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:38,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:38,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-16 02:56:38,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:38,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:38,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:38,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:38,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:38,131 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 27 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-16 02:56:38,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:56:38,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024609138] [2023-02-16 02:56:38,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024609138] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:56:38,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924841414] [2023-02-16 02:56:38,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 02:56:38,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:56:38,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:56:38,150 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:56:38,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-16 02:56:38,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 02:56:38,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:56:38,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-16 02:56:38,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:56:38,711 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-16 02:56:38,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:56:40,587 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 63 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-16 02:56:40,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924841414] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:56:40,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:56:40,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 25] total 53 [2023-02-16 02:56:40,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008711604] [2023-02-16 02:56:40,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:56:40,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-16 02:56:40,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:56:40,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-16 02:56:40,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=2588, Unknown=0, NotChecked=0, Total=2756 [2023-02-16 02:56:40,591 INFO L87 Difference]: Start difference. First operand 128 states and 177 transitions. Second operand has 53 states, 48 states have (on average 2.125) internal successors, (102), 38 states have internal predecessors, (102), 19 states have call successors, (21), 1 states have call predecessors, (21), 16 states have return successors, (24), 18 states have call predecessors, (24), 19 states have call successors, (24) [2023-02-16 02:56:41,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:56:41,330 INFO L93 Difference]: Finished difference Result 185 states and 250 transitions. [2023-02-16 02:56:41,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-16 02:56:41,331 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 48 states have (on average 2.125) internal successors, (102), 38 states have internal predecessors, (102), 19 states have call successors, (21), 1 states have call predecessors, (21), 16 states have return successors, (24), 18 states have call predecessors, (24), 19 states have call successors, (24) Word has length 67 [2023-02-16 02:56:41,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:56:41,332 INFO L225 Difference]: With dead ends: 185 [2023-02-16 02:56:41,332 INFO L226 Difference]: Without dead ends: 181 [2023-02-16 02:56:41,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 109 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=423, Invalid=4407, Unknown=0, NotChecked=0, Total=4830 [2023-02-16 02:56:41,333 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 57 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 1387 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 1419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 02:56:41,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 850 Invalid, 1419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1387 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 02:56:41,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-02-16 02:56:41,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 136. [2023-02-16 02:56:41,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 94 states have (on average 1.0638297872340425) internal successors, (100), 89 states have internal predecessors, (100), 11 states have call successors, (11), 4 states have call predecessors, (11), 30 states have return successors, (78), 42 states have call predecessors, (78), 11 states have call successors, (78) [2023-02-16 02:56:41,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 189 transitions. [2023-02-16 02:56:41,340 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 189 transitions. Word has length 67 [2023-02-16 02:56:41,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:56:41,341 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 189 transitions. [2023-02-16 02:56:41,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 48 states have (on average 2.125) internal successors, (102), 38 states have internal predecessors, (102), 19 states have call successors, (21), 1 states have call predecessors, (21), 16 states have return successors, (24), 18 states have call predecessors, (24), 19 states have call successors, (24) [2023-02-16 02:56:41,341 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 189 transitions. [2023-02-16 02:56:41,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-16 02:56:41,341 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:56:41,342 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:56:41,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-16 02:56:41,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-02-16 02:56:41,547 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:56:41,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:56:41,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1906616390, now seen corresponding path program 17 times [2023-02-16 02:56:41,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:56:41,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451110832] [2023-02-16 02:56:41,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:56:41,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:56:41,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:41,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:56:41,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:41,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:41,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:41,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:41,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:41,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:41,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:41,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-16 02:56:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:41,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:41,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:41,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:41,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:41,924 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-16 02:56:41,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:56:41,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451110832] [2023-02-16 02:56:41,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451110832] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:56:41,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247443039] [2023-02-16 02:56:41,925 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 02:56:41,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:56:41,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:56:41,926 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:56:41,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-16 02:56:42,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-16 02:56:42,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:56:42,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-16 02:56:42,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:56:42,417 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-16 02:56:42,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:56:44,141 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-16 02:56:44,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247443039] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:56:44,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:56:44,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 26] total 44 [2023-02-16 02:56:44,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411947438] [2023-02-16 02:56:44,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:56:44,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-16 02:56:44,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:56:44,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-16 02:56:44,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1720, Unknown=0, NotChecked=0, Total=1892 [2023-02-16 02:56:44,143 INFO L87 Difference]: Start difference. First operand 136 states and 189 transitions. Second operand has 44 states, 38 states have (on average 2.289473684210526) internal successors, (87), 34 states have internal predecessors, (87), 17 states have call successors, (19), 1 states have call predecessors, (19), 10 states have return successors, (23), 13 states have call predecessors, (23), 17 states have call successors, (23) [2023-02-16 02:56:44,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:56:44,697 INFO L93 Difference]: Finished difference Result 208 states and 292 transitions. [2023-02-16 02:56:44,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-16 02:56:44,698 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 38 states have (on average 2.289473684210526) internal successors, (87), 34 states have internal predecessors, (87), 17 states have call successors, (19), 1 states have call predecessors, (19), 10 states have return successors, (23), 13 states have call predecessors, (23), 17 states have call successors, (23) Word has length 67 [2023-02-16 02:56:44,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:56:44,699 INFO L225 Difference]: With dead ends: 208 [2023-02-16 02:56:44,699 INFO L226 Difference]: Without dead ends: 204 [2023-02-16 02:56:44,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 111 SyntacticMatches, 14 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=364, Invalid=2716, Unknown=0, NotChecked=0, Total=3080 [2023-02-16 02:56:44,700 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 34 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 02:56:44,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 515 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 02:56:44,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-02-16 02:56:44,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 136. [2023-02-16 02:56:44,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 94 states have (on average 1.0638297872340425) internal successors, (100), 88 states have internal predecessors, (100), 12 states have call successors, (12), 4 states have call predecessors, (12), 29 states have return successors, (75), 43 states have call predecessors, (75), 12 states have call successors, (75) [2023-02-16 02:56:44,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 187 transitions. [2023-02-16 02:56:44,708 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 187 transitions. Word has length 67 [2023-02-16 02:56:44,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:56:44,708 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 187 transitions. [2023-02-16 02:56:44,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 38 states have (on average 2.289473684210526) internal successors, (87), 34 states have internal predecessors, (87), 17 states have call successors, (19), 1 states have call predecessors, (19), 10 states have return successors, (23), 13 states have call predecessors, (23), 17 states have call successors, (23) [2023-02-16 02:56:44,708 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 187 transitions. [2023-02-16 02:56:44,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-16 02:56:44,709 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:56:44,709 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:56:44,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-02-16 02:56:44,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:56:44,914 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:56:44,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:56:44,915 INFO L85 PathProgramCache]: Analyzing trace with hash 559475846, now seen corresponding path program 18 times [2023-02-16 02:56:44,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:56:44,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989999465] [2023-02-16 02:56:44,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:56:44,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:56:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:44,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:56:44,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:45,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:45,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:45,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:45,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:45,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:45,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:45,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:45,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:45,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-16 02:56:45,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:45,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:45,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:45,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:45,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:45,286 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-16 02:56:45,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:56:45,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989999465] [2023-02-16 02:56:45,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989999465] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:56:45,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258162866] [2023-02-16 02:56:45,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 02:56:45,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:56:45,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:56:45,288 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:56:45,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-16 02:56:45,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-16 02:56:45,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:56:45,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-16 02:56:45,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:56:45,758 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-16 02:56:45,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:56:46,866 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 6 proven. 58 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-16 02:56:46,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258162866] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:56:46,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:56:46,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 27] total 49 [2023-02-16 02:56:46,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197673617] [2023-02-16 02:56:46,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:56:46,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-16 02:56:46,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:56:46,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-16 02:56:46,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2182, Unknown=0, NotChecked=0, Total=2352 [2023-02-16 02:56:46,868 INFO L87 Difference]: Start difference. First operand 136 states and 187 transitions. Second operand has 49 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 38 states have internal predecessors, (92), 18 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (22), 14 states have call predecessors, (22), 18 states have call successors, (22) [2023-02-16 02:56:47,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:56:47,353 INFO L93 Difference]: Finished difference Result 232 states and 330 transitions. [2023-02-16 02:56:47,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-16 02:56:47,354 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 38 states have internal predecessors, (92), 18 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (22), 14 states have call predecessors, (22), 18 states have call successors, (22) Word has length 67 [2023-02-16 02:56:47,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:56:47,355 INFO L225 Difference]: With dead ends: 232 [2023-02-16 02:56:47,355 INFO L226 Difference]: Without dead ends: 228 [2023-02-16 02:56:47,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 103 SyntacticMatches, 17 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=415, Invalid=3491, Unknown=0, NotChecked=0, Total=3906 [2023-02-16 02:56:47,356 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 53 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 1218 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 02:56:47,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 768 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1218 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 02:56:47,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-02-16 02:56:47,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 143. [2023-02-16 02:56:47,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 99 states have (on average 1.0606060606060606) internal successors, (105), 92 states have internal predecessors, (105), 12 states have call successors, (12), 4 states have call predecessors, (12), 31 states have return successors, (81), 46 states have call predecessors, (81), 12 states have call successors, (81) [2023-02-16 02:56:47,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 198 transitions. [2023-02-16 02:56:47,365 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 198 transitions. Word has length 67 [2023-02-16 02:56:47,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:56:47,366 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 198 transitions. [2023-02-16 02:56:47,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 38 states have internal predecessors, (92), 18 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (22), 14 states have call predecessors, (22), 18 states have call successors, (22) [2023-02-16 02:56:47,366 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 198 transitions. [2023-02-16 02:56:47,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-16 02:56:47,369 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:56:47,369 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:56:47,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-16 02:56:47,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:56:47,570 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:56:47,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:56:47,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1155297274, now seen corresponding path program 19 times [2023-02-16 02:56:47,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:56:47,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62690712] [2023-02-16 02:56:47,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:56:47,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:56:47,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:47,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:56:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:47,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:47,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:47,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:47,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:47,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:47,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:47,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:47,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-16 02:56:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:47,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:47,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:47,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:47,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:47,983 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-16 02:56:47,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:56:47,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62690712] [2023-02-16 02:56:47,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62690712] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:56:47,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503729312] [2023-02-16 02:56:47,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 02:56:47,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:56:47,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:56:47,989 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:56:47,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-16 02:56:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:48,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-16 02:56:48,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:56:48,444 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-16 02:56:48,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:56:50,053 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 60 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-16 02:56:50,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503729312] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:56:50,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:56:50,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 27] total 53 [2023-02-16 02:56:50,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000560943] [2023-02-16 02:56:50,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:56:50,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-16 02:56:50,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:56:50,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-16 02:56:50,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2554, Unknown=0, NotChecked=0, Total=2756 [2023-02-16 02:56:50,064 INFO L87 Difference]: Start difference. First operand 143 states and 198 transitions. Second operand has 53 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 40 states have internal predecessors, (98), 18 states have call successors, (20), 1 states have call predecessors, (20), 13 states have return successors, (24), 16 states have call predecessors, (24), 18 states have call successors, (24) [2023-02-16 02:56:50,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:56:50,672 INFO L93 Difference]: Finished difference Result 223 states and 318 transitions. [2023-02-16 02:56:50,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-16 02:56:50,680 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 40 states have internal predecessors, (98), 18 states have call successors, (20), 1 states have call predecessors, (20), 13 states have return successors, (24), 16 states have call predecessors, (24), 18 states have call successors, (24) Word has length 67 [2023-02-16 02:56:50,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:56:50,692 INFO L225 Difference]: With dead ends: 223 [2023-02-16 02:56:50,692 INFO L226 Difference]: Without dead ends: 219 [2023-02-16 02:56:50,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 105 SyntacticMatches, 10 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=508, Invalid=4048, Unknown=0, NotChecked=0, Total=4556 [2023-02-16 02:56:50,693 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 83 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 02:56:50,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 641 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 968 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 02:56:50,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-02-16 02:56:50,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 128. [2023-02-16 02:56:50,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 88 states have (on average 1.0681818181818181) internal successors, (94), 84 states have internal predecessors, (94), 12 states have call successors, (12), 4 states have call predecessors, (12), 27 states have return successors, (69), 39 states have call predecessors, (69), 12 states have call successors, (69) [2023-02-16 02:56:50,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 175 transitions. [2023-02-16 02:56:50,702 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 175 transitions. Word has length 67 [2023-02-16 02:56:50,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:56:50,702 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 175 transitions. [2023-02-16 02:56:50,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 40 states have internal predecessors, (98), 18 states have call successors, (20), 1 states have call predecessors, (20), 13 states have return successors, (24), 16 states have call predecessors, (24), 18 states have call successors, (24) [2023-02-16 02:56:50,703 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 175 transitions. [2023-02-16 02:56:50,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-16 02:56:50,703 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:56:50,703 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:56:50,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-02-16 02:56:50,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:56:50,909 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:56:50,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:56:50,909 INFO L85 PathProgramCache]: Analyzing trace with hash -37775706, now seen corresponding path program 20 times [2023-02-16 02:56:50,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:56:50,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391266910] [2023-02-16 02:56:50,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:56:50,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:56:50,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:50,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:56:50,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:51,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:51,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:51,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:51,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:51,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:51,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:51,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:51,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-16 02:56:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:51,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:51,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:51,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-16 02:56:51,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:56:51,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391266910] [2023-02-16 02:56:51,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391266910] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:56:51,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117300205] [2023-02-16 02:56:51,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 02:56:51,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:56:51,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:56:51,248 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:56:51,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-16 02:56:51,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 02:56:51,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:56:51,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-16 02:56:51,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:56:51,718 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-16 02:56:51,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:56:52,893 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-16 02:56:52,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117300205] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:56:52,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:56:52,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 26] total 42 [2023-02-16 02:56:52,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437004364] [2023-02-16 02:56:52,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:56:52,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-16 02:56:52,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:56:52,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-16 02:56:52,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1562, Unknown=0, NotChecked=0, Total=1722 [2023-02-16 02:56:52,895 INFO L87 Difference]: Start difference. First operand 128 states and 175 transitions. Second operand has 42 states, 37 states have (on average 2.324324324324324) internal successors, (86), 33 states have internal predecessors, (86), 17 states have call successors, (18), 1 states have call predecessors, (18), 10 states have return successors, (21), 12 states have call predecessors, (21), 17 states have call successors, (21) [2023-02-16 02:56:53,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:56:53,325 INFO L93 Difference]: Finished difference Result 172 states and 239 transitions. [2023-02-16 02:56:53,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-16 02:56:53,325 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 2.324324324324324) internal successors, (86), 33 states have internal predecessors, (86), 17 states have call successors, (18), 1 states have call predecessors, (18), 10 states have return successors, (21), 12 states have call predecessors, (21), 17 states have call successors, (21) Word has length 67 [2023-02-16 02:56:53,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:56:53,326 INFO L225 Difference]: With dead ends: 172 [2023-02-16 02:56:53,326 INFO L226 Difference]: Without dead ends: 168 [2023-02-16 02:56:53,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 108 SyntacticMatches, 19 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=368, Invalid=2602, Unknown=0, NotChecked=0, Total=2970 [2023-02-16 02:56:53,327 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 50 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 02:56:53,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 663 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 02:56:53,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-02-16 02:56:53,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 115. [2023-02-16 02:56:53,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 77 states have internal predecessors, (85), 11 states have call successors, (11), 4 states have call predecessors, (11), 24 states have return successors, (60), 33 states have call predecessors, (60), 11 states have call successors, (60) [2023-02-16 02:56:53,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 156 transitions. [2023-02-16 02:56:53,333 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 156 transitions. Word has length 67 [2023-02-16 02:56:53,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:56:53,333 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 156 transitions. [2023-02-16 02:56:53,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 2.324324324324324) internal successors, (86), 33 states have internal predecessors, (86), 17 states have call successors, (18), 1 states have call predecessors, (18), 10 states have return successors, (21), 12 states have call predecessors, (21), 17 states have call successors, (21) [2023-02-16 02:56:53,334 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 156 transitions. [2023-02-16 02:56:53,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-16 02:56:53,334 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:56:53,334 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:56:53,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-02-16 02:56:53,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-02-16 02:56:53,542 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:56:53,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:56:53,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1331044026, now seen corresponding path program 21 times [2023-02-16 02:56:53,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:56:53,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898527341] [2023-02-16 02:56:53,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:56:53,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:56:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:53,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:56:53,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:53,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:53,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:53,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:53,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:53,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:53,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:53,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:53,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:53,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:53,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:53,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-16 02:56:53,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:53,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:53,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:53,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:53,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:54,000 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 14 proven. 59 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-16 02:56:54,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:56:54,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898527341] [2023-02-16 02:56:54,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898527341] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:56:54,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670704942] [2023-02-16 02:56:54,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 02:56:54,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:56:54,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:56:54,001 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:56:54,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-16 02:56:54,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-16 02:56:54,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:56:54,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-16 02:56:54,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:56:54,676 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 31 proven. 35 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-16 02:56:54,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:56:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 13 proven. 69 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-16 02:56:57,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670704942] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:56:57,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:56:57,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20, 24] total 52 [2023-02-16 02:56:57,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883338549] [2023-02-16 02:56:57,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:56:57,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-16 02:56:57,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:56:57,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-16 02:56:57,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2477, Unknown=0, NotChecked=0, Total=2652 [2023-02-16 02:56:57,236 INFO L87 Difference]: Start difference. First operand 115 states and 156 transitions. Second operand has 52 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 38 states have internal predecessors, (102), 19 states have call successors, (22), 1 states have call predecessors, (22), 13 states have return successors, (27), 17 states have call predecessors, (27), 19 states have call successors, (27) [2023-02-16 02:56:58,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:56:58,698 INFO L93 Difference]: Finished difference Result 284 states and 399 transitions. [2023-02-16 02:56:58,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-16 02:56:58,699 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 38 states have internal predecessors, (102), 19 states have call successors, (22), 1 states have call predecessors, (22), 13 states have return successors, (27), 17 states have call predecessors, (27), 19 states have call successors, (27) Word has length 75 [2023-02-16 02:56:58,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:56:58,700 INFO L225 Difference]: With dead ends: 284 [2023-02-16 02:56:58,700 INFO L226 Difference]: Without dead ends: 280 [2023-02-16 02:56:58,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 121 SyntacticMatches, 16 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=821, Invalid=5499, Unknown=0, NotChecked=0, Total=6320 [2023-02-16 02:56:58,701 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 49 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 1922 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 1961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-16 02:56:58,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 856 Invalid, 1961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1922 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-16 02:56:58,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2023-02-16 02:56:58,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 100. [2023-02-16 02:56:58,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 states have internal predecessors, (75), 10 states have call successors, (10), 4 states have call predecessors, (10), 20 states have return successors, (47), 27 states have call predecessors, (47), 10 states have call successors, (47) [2023-02-16 02:56:58,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 132 transitions. [2023-02-16 02:56:58,708 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 132 transitions. Word has length 75 [2023-02-16 02:56:58,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:56:58,708 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 132 transitions. [2023-02-16 02:56:58,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 38 states have internal predecessors, (102), 19 states have call successors, (22), 1 states have call predecessors, (22), 13 states have return successors, (27), 17 states have call predecessors, (27), 19 states have call successors, (27) [2023-02-16 02:56:58,709 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 132 transitions. [2023-02-16 02:56:58,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-16 02:56:58,709 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:56:58,709 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:56:58,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-02-16 02:56:58,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-02-16 02:56:58,910 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:56:58,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:56:58,910 INFO L85 PathProgramCache]: Analyzing trace with hash 225391458, now seen corresponding path program 22 times [2023-02-16 02:56:58,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:56:58,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762008976] [2023-02-16 02:56:58,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:56:58,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:56:58,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:58,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:56:58,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:59,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:59,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:59,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:59,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:59,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:59,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:59,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:59,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:59,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:56:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:59,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-16 02:56:59,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:59,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:56:59,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:56:59,315 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-02-16 02:56:59,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:56:59,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762008976] [2023-02-16 02:56:59,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762008976] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:56:59,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605658048] [2023-02-16 02:56:59,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 02:56:59,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:56:59,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:56:59,317 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:56:59,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-16 02:56:59,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 02:56:59,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:56:59,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-16 02:56:59,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:57:00,109 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-16 02:57:00,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:57:01,971 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 15 proven. 67 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-16 02:57:01,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605658048] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:57:01,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:57:01,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 29] total 62 [2023-02-16 02:57:01,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709747560] [2023-02-16 02:57:01,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:57:01,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-02-16 02:57:01,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:57:01,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-02-16 02:57:01,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=3527, Unknown=0, NotChecked=0, Total=3782 [2023-02-16 02:57:01,981 INFO L87 Difference]: Start difference. First operand 100 states and 132 transitions. Second operand has 62 states, 52 states have (on average 2.019230769230769) internal successors, (105), 47 states have internal predecessors, (105), 20 states have call successors, (22), 1 states have call predecessors, (22), 14 states have return successors, (24), 17 states have call predecessors, (24), 20 states have call successors, (24) [2023-02-16 02:57:02,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:57:02,859 INFO L93 Difference]: Finished difference Result 201 states and 277 transitions. [2023-02-16 02:57:02,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-16 02:57:02,860 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 52 states have (on average 2.019230769230769) internal successors, (105), 47 states have internal predecessors, (105), 20 states have call successors, (22), 1 states have call predecessors, (22), 14 states have return successors, (24), 17 states have call predecessors, (24), 20 states have call successors, (24) Word has length 68 [2023-02-16 02:57:02,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:57:02,861 INFO L225 Difference]: With dead ends: 201 [2023-02-16 02:57:02,861 INFO L226 Difference]: Without dead ends: 197 [2023-02-16 02:57:02,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 102 SyntacticMatches, 9 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1692 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=845, Invalid=5961, Unknown=0, NotChecked=0, Total=6806 [2023-02-16 02:57:02,867 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 87 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 1409 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 1487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 02:57:02,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 721 Invalid, 1487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1409 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 02:57:02,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-02-16 02:57:02,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 63. [2023-02-16 02:57:02,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 45 states have internal predecessors, (50), 9 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (16), 13 states have call predecessors, (16), 9 states have call successors, (16) [2023-02-16 02:57:02,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2023-02-16 02:57:02,873 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 68 [2023-02-16 02:57:02,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:57:02,873 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2023-02-16 02:57:02,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 52 states have (on average 2.019230769230769) internal successors, (105), 47 states have internal predecessors, (105), 20 states have call successors, (22), 1 states have call predecessors, (22), 14 states have return successors, (24), 17 states have call predecessors, (24), 20 states have call successors, (24) [2023-02-16 02:57:02,874 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2023-02-16 02:57:02,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-16 02:57:02,874 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:57:02,874 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:57:02,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-02-16 02:57:03,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-02-16 02:57:03,091 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:57:03,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:57:03,091 INFO L85 PathProgramCache]: Analyzing trace with hash -835098444, now seen corresponding path program 6 times [2023-02-16 02:57:03,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:57:03,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983215492] [2023-02-16 02:57:03,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:57:03,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:57:03,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:03,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:57:03,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:03,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:57:03,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:03,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:57:03,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:03,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-16 02:57:03,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:03,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:57:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:03,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:57:03,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:03,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:57:03,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:03,348 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-16 02:57:03,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:57:03,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983215492] [2023-02-16 02:57:03,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983215492] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:57:03,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039266577] [2023-02-16 02:57:03,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 02:57:03,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:57:03,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:57:03,350 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:57:03,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-16 02:57:03,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-16 02:57:03,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:57:03,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-16 02:57:03,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:57:03,903 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-16 02:57:03,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:57:04,605 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 02:57:04,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039266577] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:57:04,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:57:04,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 21] total 40 [2023-02-16 02:57:04,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532314336] [2023-02-16 02:57:04,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:57:04,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-16 02:57:04,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:57:04,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-16 02:57:04,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1429, Unknown=0, NotChecked=0, Total=1560 [2023-02-16 02:57:04,611 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 40 states, 35 states have (on average 2.342857142857143) internal successors, (82), 33 states have internal predecessors, (82), 16 states have call successors, (16), 1 states have call predecessors, (16), 11 states have return successors, (19), 11 states have call predecessors, (19), 16 states have call successors, (19) [2023-02-16 02:57:04,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:57:04,894 INFO L93 Difference]: Finished difference Result 85 states and 105 transitions. [2023-02-16 02:57:04,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-16 02:57:04,895 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 2.342857142857143) internal successors, (82), 33 states have internal predecessors, (82), 16 states have call successors, (16), 1 states have call predecessors, (16), 11 states have return successors, (19), 11 states have call predecessors, (19), 16 states have call successors, (19) Word has length 58 [2023-02-16 02:57:04,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:57:04,917 INFO L225 Difference]: With dead ends: 85 [2023-02-16 02:57:04,917 INFO L226 Difference]: Without dead ends: 76 [2023-02-16 02:57:04,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 93 SyntacticMatches, 12 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=271, Invalid=2179, Unknown=0, NotChecked=0, Total=2450 [2023-02-16 02:57:04,918 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 32 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:57:04,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 398 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:57:04,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-02-16 02:57:04,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 66. [2023-02-16 02:57:04,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 47 states have internal predecessors, (52), 9 states have call successors, (9), 4 states have call predecessors, (9), 10 states have return successors, (18), 14 states have call predecessors, (18), 9 states have call successors, (18) [2023-02-16 02:57:04,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2023-02-16 02:57:04,922 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 58 [2023-02-16 02:57:04,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:57:04,923 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2023-02-16 02:57:04,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 2.342857142857143) internal successors, (82), 33 states have internal predecessors, (82), 16 states have call successors, (16), 1 states have call predecessors, (16), 11 states have return successors, (19), 11 states have call predecessors, (19), 16 states have call successors, (19) [2023-02-16 02:57:04,923 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2023-02-16 02:57:04,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-16 02:57:04,926 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:57:04,926 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2023-02-16 02:57:04,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-02-16 02:57:05,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-02-16 02:57:05,127 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:57:05,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:57:05,127 INFO L85 PathProgramCache]: Analyzing trace with hash -551668204, now seen corresponding path program 23 times [2023-02-16 02:57:05,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:57:05,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300248713] [2023-02-16 02:57:05,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:57:05,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:57:05,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:05,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:57:05,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:05,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:57:05,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:05,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:57:05,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:05,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-16 02:57:05,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:05,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:57:05,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:05,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:57:05,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:05,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:57:05,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:05,496 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-16 02:57:05,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:57:05,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300248713] [2023-02-16 02:57:05,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300248713] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:57:05,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552126292] [2023-02-16 02:57:05,497 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 02:57:05,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:57:05,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:57:05,508 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:57:05,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-02-16 02:57:05,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-16 02:57:05,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:57:05,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-16 02:57:05,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:57:06,049 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-16 02:57:06,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:57:06,919 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 02:57:06,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552126292] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:57:06,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:57:06,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 21] total 40 [2023-02-16 02:57:06,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709168693] [2023-02-16 02:57:06,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:57:06,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-16 02:57:06,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:57:06,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-16 02:57:06,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1429, Unknown=0, NotChecked=0, Total=1560 [2023-02-16 02:57:06,921 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 40 states, 35 states have (on average 2.342857142857143) internal successors, (82), 33 states have internal predecessors, (82), 16 states have call successors, (16), 1 states have call predecessors, (16), 11 states have return successors, (19), 11 states have call predecessors, (19), 16 states have call successors, (19) [2023-02-16 02:57:07,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:57:07,216 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2023-02-16 02:57:07,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-16 02:57:07,217 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 2.342857142857143) internal successors, (82), 33 states have internal predecessors, (82), 16 states have call successors, (16), 1 states have call predecessors, (16), 11 states have return successors, (19), 11 states have call predecessors, (19), 16 states have call successors, (19) Word has length 58 [2023-02-16 02:57:07,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:57:07,217 INFO L225 Difference]: With dead ends: 89 [2023-02-16 02:57:07,217 INFO L226 Difference]: Without dead ends: 80 [2023-02-16 02:57:07,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 92 SyntacticMatches, 13 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=271, Invalid=2179, Unknown=0, NotChecked=0, Total=2450 [2023-02-16 02:57:07,218 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 41 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 02:57:07,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 425 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 02:57:07,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-16 02:57:07,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2023-02-16 02:57:07,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 48 states have (on average 1.125) internal successors, (54), 49 states have internal predecessors, (54), 9 states have call successors, (9), 4 states have call predecessors, (9), 11 states have return successors, (20), 15 states have call predecessors, (20), 9 states have call successors, (20) [2023-02-16 02:57:07,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2023-02-16 02:57:07,222 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 58 [2023-02-16 02:57:07,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:57:07,222 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2023-02-16 02:57:07,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 2.342857142857143) internal successors, (82), 33 states have internal predecessors, (82), 16 states have call successors, (16), 1 states have call predecessors, (16), 11 states have return successors, (19), 11 states have call predecessors, (19), 16 states have call successors, (19) [2023-02-16 02:57:07,222 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2023-02-16 02:57:07,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-16 02:57:07,223 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:57:07,223 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:57:07,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-02-16 02:57:07,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:57:07,429 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:57:07,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:57:07,429 INFO L85 PathProgramCache]: Analyzing trace with hash 590358656, now seen corresponding path program 24 times [2023-02-16 02:57:07,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:57:07,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189112933] [2023-02-16 02:57:07,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:57:07,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:57:07,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:07,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:57:07,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:07,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:57:07,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:07,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:57:07,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:07,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:57:07,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:07,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 02:57:07,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:07,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:57:07,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:07,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:57:07,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:07,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:57:07,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:07,818 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-16 02:57:07,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:57:07,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189112933] [2023-02-16 02:57:07,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189112933] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:57:07,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3328764] [2023-02-16 02:57:07,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 02:57:07,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:57:07,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:57:07,819 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:57:07,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-02-16 02:57:08,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-16 02:57:08,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:57:08,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-16 02:57:08,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:57:08,482 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-16 02:57:08,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:57:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-16 02:57:09,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3328764] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:57:09,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:57:09,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 22] total 42 [2023-02-16 02:57:09,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574400371] [2023-02-16 02:57:09,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:57:09,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-16 02:57:09,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:57:09,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-16 02:57:09,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1586, Unknown=0, NotChecked=0, Total=1722 [2023-02-16 02:57:09,830 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand has 42 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 33 states have internal predecessors, (87), 16 states have call successors, (19), 1 states have call predecessors, (19), 11 states have return successors, (22), 13 states have call predecessors, (22), 16 states have call successors, (22) [2023-02-16 02:57:10,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:57:10,292 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2023-02-16 02:57:10,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-16 02:57:10,293 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 33 states have internal predecessors, (87), 16 states have call successors, (19), 1 states have call predecessors, (19), 11 states have return successors, (22), 13 states have call predecessors, (22), 16 states have call successors, (22) Word has length 66 [2023-02-16 02:57:10,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:57:10,293 INFO L225 Difference]: With dead ends: 90 [2023-02-16 02:57:10,293 INFO L226 Difference]: Without dead ends: 81 [2023-02-16 02:57:10,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 108 SyntacticMatches, 15 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=287, Invalid=2469, Unknown=0, NotChecked=0, Total=2756 [2023-02-16 02:57:10,294 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 50 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 02:57:10,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 495 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 02:57:10,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-02-16 02:57:10,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2023-02-16 02:57:10,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 51 states have internal predecessors, (55), 9 states have call successors, (9), 4 states have call predecessors, (9), 12 states have return successors, (22), 15 states have call predecessors, (22), 9 states have call successors, (22) [2023-02-16 02:57:10,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2023-02-16 02:57:10,298 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 66 [2023-02-16 02:57:10,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:57:10,298 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2023-02-16 02:57:10,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 33 states have internal predecessors, (87), 16 states have call successors, (19), 1 states have call predecessors, (19), 11 states have return successors, (22), 13 states have call predecessors, (22), 16 states have call successors, (22) [2023-02-16 02:57:10,298 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2023-02-16 02:57:10,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-16 02:57:10,299 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:57:10,299 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:57:10,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-02-16 02:57:10,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-02-16 02:57:10,505 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:57:10,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:57:10,506 INFO L85 PathProgramCache]: Analyzing trace with hash 720804832, now seen corresponding path program 7 times [2023-02-16 02:57:10,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:57:10,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281921438] [2023-02-16 02:57:10,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:57:10,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:57:10,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:10,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:57:10,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:10,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:57:10,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:10,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:57:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:10,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:57:10,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:10,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 02:57:10,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:10,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:57:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:10,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:57:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:10,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:57:10,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:10,778 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-02-16 02:57:10,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:57:10,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281921438] [2023-02-16 02:57:10,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281921438] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:57:10,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929835518] [2023-02-16 02:57:10,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 02:57:10,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:57:10,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:57:10,780 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:57:10,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-02-16 02:57:11,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:11,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-16 02:57:11,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:57:11,334 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-02-16 02:57:11,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:57:12,591 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-16 02:57:12,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929835518] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:57:12,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:57:12,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 23] total 34 [2023-02-16 02:57:12,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80115554] [2023-02-16 02:57:12,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:57:12,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-16 02:57:12,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:57:12,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-16 02:57:12,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1024, Unknown=0, NotChecked=0, Total=1122 [2023-02-16 02:57:12,596 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand has 34 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 28 states have internal predecessors, (81), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (20), 10 states have call predecessors, (20), 14 states have call successors, (20) [2023-02-16 02:57:12,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:57:12,874 INFO L93 Difference]: Finished difference Result 101 states and 125 transitions. [2023-02-16 02:57:12,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-16 02:57:12,875 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 28 states have internal predecessors, (81), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (20), 10 states have call predecessors, (20), 14 states have call successors, (20) Word has length 66 [2023-02-16 02:57:12,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:57:12,875 INFO L225 Difference]: With dead ends: 101 [2023-02-16 02:57:12,875 INFO L226 Difference]: Without dead ends: 97 [2023-02-16 02:57:12,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 113 SyntacticMatches, 16 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=216, Invalid=1764, Unknown=0, NotChecked=0, Total=1980 [2023-02-16 02:57:12,880 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 97 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 02:57:12,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 525 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 02:57:12,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-02-16 02:57:12,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 82. [2023-02-16 02:57:12,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 58 states have internal predecessors, (62), 10 states have call successors, (10), 4 states have call predecessors, (10), 15 states have return successors, (29), 19 states have call predecessors, (29), 10 states have call successors, (29) [2023-02-16 02:57:12,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2023-02-16 02:57:12,889 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 66 [2023-02-16 02:57:12,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:57:12,890 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2023-02-16 02:57:12,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 28 states have internal predecessors, (81), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (20), 10 states have call predecessors, (20), 14 states have call successors, (20) [2023-02-16 02:57:12,891 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2023-02-16 02:57:12,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-16 02:57:12,891 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:57:12,891 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:57:12,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-02-16 02:57:13,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:57:13,101 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:57:13,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:57:13,102 INFO L85 PathProgramCache]: Analyzing trace with hash 485380736, now seen corresponding path program 25 times [2023-02-16 02:57:13,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:57:13,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912828874] [2023-02-16 02:57:13,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:57:13,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:57:13,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:13,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:57:13,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:13,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:57:13,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:13,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:57:13,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:13,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:57:13,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:13,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 02:57:13,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:13,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:57:13,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:13,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:57:13,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:13,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:57:13,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:13,445 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-16 02:57:13,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:57:13,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912828874] [2023-02-16 02:57:13,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912828874] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:57:13,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674019741] [2023-02-16 02:57:13,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 02:57:13,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:57:13,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:57:13,447 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:57:13,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-02-16 02:57:13,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:13,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-16 02:57:13,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:57:14,258 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-16 02:57:14,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:57:30,871 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification. DAG size of input: 92 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 02:57:45,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674019741] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:57:45,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:57:45,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2023-02-16 02:57:45,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627408785] [2023-02-16 02:57:45,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:57:45,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-16 02:57:45,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:57:45,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-16 02:57:45,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2260, Unknown=8, NotChecked=0, Total=2450 [2023-02-16 02:57:45,230 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand has 35 states, 30 states have (on average 2.033333333333333) internal successors, (61), 27 states have internal predecessors, (61), 11 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (16), 12 states have call predecessors, (16), 11 states have call successors, (16) [2023-02-16 02:57:45,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:57:45,792 INFO L93 Difference]: Finished difference Result 130 states and 167 transitions. [2023-02-16 02:57:45,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-16 02:57:45,793 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 30 states have (on average 2.033333333333333) internal successors, (61), 27 states have internal predecessors, (61), 11 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (16), 12 states have call predecessors, (16), 11 states have call successors, (16) Word has length 66 [2023-02-16 02:57:45,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:57:45,794 INFO L225 Difference]: With dead ends: 130 [2023-02-16 02:57:45,794 INFO L226 Difference]: Without dead ends: 126 [2023-02-16 02:57:45,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 86 SyntacticMatches, 9 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 30.4s TimeCoverageRelationStatistics Valid=339, Invalid=3313, Unknown=8, NotChecked=0, Total=3660 [2023-02-16 02:57:45,795 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 34 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 02:57:45,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 513 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 02:57:45,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-02-16 02:57:45,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 95. [2023-02-16 02:57:45,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 66 states have internal predecessors, (71), 10 states have call successors, (10), 4 states have call predecessors, (10), 19 states have return successors, (40), 24 states have call predecessors, (40), 10 states have call successors, (40) [2023-02-16 02:57:45,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 121 transitions. [2023-02-16 02:57:45,800 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 121 transitions. Word has length 66 [2023-02-16 02:57:45,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:57:45,801 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 121 transitions. [2023-02-16 02:57:45,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 30 states have (on average 2.033333333333333) internal successors, (61), 27 states have internal predecessors, (61), 11 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (16), 12 states have call predecessors, (16), 11 states have call successors, (16) [2023-02-16 02:57:45,801 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 121 transitions. [2023-02-16 02:57:45,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-16 02:57:45,803 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:57:45,803 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:57:45,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-02-16 02:57:46,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:57:46,011 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:57:46,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:57:46,011 INFO L85 PathProgramCache]: Analyzing trace with hash 354934560, now seen corresponding path program 26 times [2023-02-16 02:57:46,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:57:46,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753055117] [2023-02-16 02:57:46,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:57:46,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:57:46,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:46,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:57:46,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:46,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:57:46,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:46,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:57:46,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:46,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:57:46,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:46,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 02:57:46,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:46,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:57:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:46,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:57:46,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:46,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:57:46,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:46,403 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-16 02:57:46,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:57:46,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753055117] [2023-02-16 02:57:46,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753055117] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:57:46,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527955843] [2023-02-16 02:57:46,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 02:57:46,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:57:46,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:57:46,405 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:57:46,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-02-16 02:57:46,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 02:57:46,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:57:46,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 73 conjunts are in the unsatisfiable core [2023-02-16 02:57:46,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:57:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 11 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-16 02:57:47,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:57:48,040 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-16 02:57:48,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527955843] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:57:48,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:57:48,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 21] total 33 [2023-02-16 02:57:48,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765426797] [2023-02-16 02:57:48,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:57:48,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-16 02:57:48,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:57:48,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-16 02:57:48,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2023-02-16 02:57:48,041 INFO L87 Difference]: Start difference. First operand 95 states and 121 transitions. Second operand has 33 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 28 states have internal predecessors, (74), 11 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (20), 12 states have call predecessors, (20), 11 states have call successors, (20) [2023-02-16 02:57:48,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:57:48,483 INFO L93 Difference]: Finished difference Result 117 states and 151 transitions. [2023-02-16 02:57:48,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-16 02:57:48,483 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 28 states have internal predecessors, (74), 11 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (20), 12 states have call predecessors, (20), 11 states have call successors, (20) Word has length 66 [2023-02-16 02:57:48,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:57:48,484 INFO L225 Difference]: With dead ends: 117 [2023-02-16 02:57:48,484 INFO L226 Difference]: Without dead ends: 108 [2023-02-16 02:57:48,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 111 SyntacticMatches, 21 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=240, Invalid=1740, Unknown=0, NotChecked=0, Total=1980 [2023-02-16 02:57:48,489 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 02:57:48,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 449 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 02:57:48,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-02-16 02:57:48,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 96. [2023-02-16 02:57:48,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 66 states have internal predecessors, (72), 10 states have call successors, (10), 4 states have call predecessors, (10), 19 states have return successors, (40), 25 states have call predecessors, (40), 10 states have call successors, (40) [2023-02-16 02:57:48,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 122 transitions. [2023-02-16 02:57:48,507 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 122 transitions. Word has length 66 [2023-02-16 02:57:48,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:57:48,507 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 122 transitions. [2023-02-16 02:57:48,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 28 states have internal predecessors, (74), 11 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (20), 12 states have call predecessors, (20), 11 states have call successors, (20) [2023-02-16 02:57:48,508 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 122 transitions. [2023-02-16 02:57:48,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-16 02:57:48,509 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:57:48,509 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:57:48,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-02-16 02:57:48,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-02-16 02:57:48,716 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:57:48,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:57:48,716 INFO L85 PathProgramCache]: Analyzing trace with hash 959666752, now seen corresponding path program 27 times [2023-02-16 02:57:48,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:57:48,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108846723] [2023-02-16 02:57:48,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:57:48,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:57:48,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:48,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:57:48,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:48,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:57:48,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:48,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:57:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:48,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:57:48,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:48,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 02:57:48,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:48,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:57:48,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:48,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:57:48,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:49,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:57:49,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:49,043 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-16 02:57:49,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:57:49,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108846723] [2023-02-16 02:57:49,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108846723] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:57:49,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483131076] [2023-02-16 02:57:49,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 02:57:49,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:57:49,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:57:49,045 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:57:49,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-02-16 02:57:49,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-16 02:57:49,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:57:49,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-16 02:57:49,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:57:49,842 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-16 02:57:49,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:57:51,912 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-16 02:57:51,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483131076] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:57:51,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:57:51,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 24] total 48 [2023-02-16 02:57:51,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506103547] [2023-02-16 02:57:51,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:57:51,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-16 02:57:51,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:57:51,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-16 02:57:51,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2107, Unknown=0, NotChecked=0, Total=2256 [2023-02-16 02:57:51,914 INFO L87 Difference]: Start difference. First operand 96 states and 122 transitions. Second operand has 48 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 37 states have internal predecessors, (98), 17 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (23), 15 states have call predecessors, (23), 17 states have call successors, (23) [2023-02-16 02:57:52,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:57:52,475 INFO L93 Difference]: Finished difference Result 136 states and 178 transitions. [2023-02-16 02:57:52,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-16 02:57:52,476 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 37 states have internal predecessors, (98), 17 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (23), 15 states have call predecessors, (23), 17 states have call successors, (23) Word has length 66 [2023-02-16 02:57:52,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:57:52,476 INFO L225 Difference]: With dead ends: 136 [2023-02-16 02:57:52,476 INFO L226 Difference]: Without dead ends: 132 [2023-02-16 02:57:52,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 107 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=280, Invalid=3142, Unknown=0, NotChecked=0, Total=3422 [2023-02-16 02:57:52,477 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 79 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 02:57:52,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 607 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 02:57:52,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-02-16 02:57:52,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 101. [2023-02-16 02:57:52,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 70 states have (on average 1.0857142857142856) internal successors, (76), 68 states have internal predecessors, (76), 10 states have call successors, (10), 4 states have call predecessors, (10), 20 states have return successors, (42), 28 states have call predecessors, (42), 10 states have call successors, (42) [2023-02-16 02:57:52,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 128 transitions. [2023-02-16 02:57:52,484 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 128 transitions. Word has length 66 [2023-02-16 02:57:52,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:57:52,484 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 128 transitions. [2023-02-16 02:57:52,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 37 states have internal predecessors, (98), 17 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (23), 15 states have call predecessors, (23), 17 states have call successors, (23) [2023-02-16 02:57:52,484 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 128 transitions. [2023-02-16 02:57:52,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-16 02:57:52,485 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:57:52,485 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:57:52,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-02-16 02:57:52,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-02-16 02:57:52,691 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:57:52,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:57:52,692 INFO L85 PathProgramCache]: Analyzing trace with hash 724242656, now seen corresponding path program 28 times [2023-02-16 02:57:52,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:57:52,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632244821] [2023-02-16 02:57:52,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:57:52,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:57:52,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:52,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:57:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:52,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:57:52,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:52,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:57:52,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:52,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:57:52,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:52,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 02:57:52,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:52,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:57:52,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:52,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:57:52,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:52,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:57:52,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:52,977 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-02-16 02:57:52,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:57:52,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632244821] [2023-02-16 02:57:52,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632244821] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:57:52,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91339060] [2023-02-16 02:57:52,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 02:57:52,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:57:52,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:57:52,979 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:57:52,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-02-16 02:57:53,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 02:57:53,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:57:53,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-16 02:57:53,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:57:53,566 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-02-16 02:57:53,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:57:54,764 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-16 02:57:54,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91339060] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:57:54,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:57:54,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 23] total 34 [2023-02-16 02:57:54,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343333604] [2023-02-16 02:57:54,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:57:54,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-16 02:57:54,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:57:54,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-16 02:57:54,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1024, Unknown=0, NotChecked=0, Total=1122 [2023-02-16 02:57:54,766 INFO L87 Difference]: Start difference. First operand 101 states and 128 transitions. Second operand has 34 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 28 states have internal predecessors, (81), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (20), 10 states have call predecessors, (20), 14 states have call successors, (20) [2023-02-16 02:57:55,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:57:55,230 INFO L93 Difference]: Finished difference Result 129 states and 164 transitions. [2023-02-16 02:57:55,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-16 02:57:55,230 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 28 states have internal predecessors, (81), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (20), 10 states have call predecessors, (20), 14 states have call successors, (20) Word has length 66 [2023-02-16 02:57:55,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:57:55,231 INFO L225 Difference]: With dead ends: 129 [2023-02-16 02:57:55,231 INFO L226 Difference]: Without dead ends: 125 [2023-02-16 02:57:55,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 111 SyntacticMatches, 18 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=216, Invalid=1764, Unknown=0, NotChecked=0, Total=1980 [2023-02-16 02:57:55,232 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 54 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 02:57:55,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 570 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 02:57:55,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-02-16 02:57:55,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 105. [2023-02-16 02:57:55,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 73 states have (on average 1.082191780821918) internal successors, (79), 70 states have internal predecessors, (79), 10 states have call successors, (10), 4 states have call predecessors, (10), 21 states have return successors, (44), 30 states have call predecessors, (44), 10 states have call successors, (44) [2023-02-16 02:57:55,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 133 transitions. [2023-02-16 02:57:55,237 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 133 transitions. Word has length 66 [2023-02-16 02:57:55,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:57:55,237 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 133 transitions. [2023-02-16 02:57:55,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 28 states have internal predecessors, (81), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (20), 10 states have call predecessors, (20), 14 states have call successors, (20) [2023-02-16 02:57:55,238 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 133 transitions. [2023-02-16 02:57:55,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-16 02:57:55,238 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:57:55,238 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:57:55,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-02-16 02:57:55,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-02-16 02:57:55,445 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:57:55,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:57:55,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1572883820, now seen corresponding path program 29 times [2023-02-16 02:57:55,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:57:55,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319071896] [2023-02-16 02:57:55,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:57:55,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:57:55,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:55,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:57:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:55,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:57:55,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:55,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:57:55,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:55,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:57:55,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:55,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:57:55,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:55,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-16 02:57:55,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:55,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:57:55,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:55,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:57:55,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:55,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:57:55,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:55,887 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 19 proven. 40 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-16 02:57:55,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:57:55,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319071896] [2023-02-16 02:57:55,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319071896] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:57:55,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915858399] [2023-02-16 02:57:55,888 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 02:57:55,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:57:55,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:57:55,889 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:57:55,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-02-16 02:57:56,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-16 02:57:56,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:57:56,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-16 02:57:56,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:57:56,668 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 41 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-16 02:57:56,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:57:58,645 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 8 proven. 74 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-16 02:57:58,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915858399] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:57:58,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:57:58,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 29] total 55 [2023-02-16 02:57:58,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185404269] [2023-02-16 02:57:58,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:57:58,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-02-16 02:57:58,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:57:58,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-02-16 02:57:58,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=2759, Unknown=0, NotChecked=0, Total=2970 [2023-02-16 02:57:58,648 INFO L87 Difference]: Start difference. First operand 105 states and 133 transitions. Second operand has 55 states, 49 states have (on average 2.061224489795918) internal successors, (101), 43 states have internal predecessors, (101), 19 states have call successors, (19), 1 states have call predecessors, (19), 15 states have return successors, (27), 16 states have call predecessors, (27), 19 states have call successors, (27) [2023-02-16 02:57:59,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:57:59,382 INFO L93 Difference]: Finished difference Result 163 states and 216 transitions. [2023-02-16 02:57:59,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-16 02:57:59,383 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 49 states have (on average 2.061224489795918) internal successors, (101), 43 states have internal predecessors, (101), 19 states have call successors, (19), 1 states have call predecessors, (19), 15 states have return successors, (27), 16 states have call predecessors, (27), 19 states have call successors, (27) Word has length 74 [2023-02-16 02:57:59,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:57:59,383 INFO L225 Difference]: With dead ends: 163 [2023-02-16 02:57:59,384 INFO L226 Difference]: Without dead ends: 159 [2023-02-16 02:57:59,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 118 SyntacticMatches, 12 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=489, Invalid=4341, Unknown=0, NotChecked=0, Total=4830 [2023-02-16 02:57:59,385 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 83 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 02:57:59,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 779 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1088 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 02:57:59,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-02-16 02:57:59,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2023-02-16 02:57:59,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 78 states have internal predecessors, (88), 10 states have call successors, (10), 4 states have call predecessors, (10), 25 states have return successors, (56), 35 states have call predecessors, (56), 10 states have call successors, (56) [2023-02-16 02:57:59,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 154 transitions. [2023-02-16 02:57:59,393 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 154 transitions. Word has length 74 [2023-02-16 02:57:59,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:57:59,394 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 154 transitions. [2023-02-16 02:57:59,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 49 states have (on average 2.061224489795918) internal successors, (101), 43 states have internal predecessors, (101), 19 states have call successors, (19), 1 states have call predecessors, (19), 15 states have return successors, (27), 16 states have call predecessors, (27), 19 states have call successors, (27) [2023-02-16 02:57:59,394 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 154 transitions. [2023-02-16 02:57:59,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-16 02:57:59,395 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:57:59,395 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:57:59,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-02-16 02:57:59,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-02-16 02:57:59,604 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:57:59,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:57:59,604 INFO L85 PathProgramCache]: Analyzing trace with hash -599965996, now seen corresponding path program 30 times [2023-02-16 02:57:59,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:57:59,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814357688] [2023-02-16 02:57:59,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:57:59,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:57:59,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:59,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:57:59,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:59,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:57:59,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:59,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:57:59,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:59,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:57:59,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:59,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:57:59,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:59,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-16 02:57:59,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:59,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:57:59,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:59,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:57:59,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:59,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:57:59,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:57:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-16 02:57:59,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:57:59,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814357688] [2023-02-16 02:57:59,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814357688] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:57:59,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605589507] [2023-02-16 02:57:59,949 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 02:57:59,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:57:59,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:57:59,950 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:57:59,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-02-16 02:58:00,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-16 02:58:00,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:58:00,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-16 02:58:00,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:58:00,598 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-16 02:58:00,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:58:02,128 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-16 02:58:02,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605589507] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:58:02,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:58:02,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 24] total 35 [2023-02-16 02:58:02,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222909546] [2023-02-16 02:58:02,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:58:02,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-16 02:58:02,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:58:02,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-16 02:58:02,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2023-02-16 02:58:02,131 INFO L87 Difference]: Start difference. First operand 118 states and 154 transitions. Second operand has 35 states, 34 states have (on average 2.5) internal successors, (85), 28 states have internal predecessors, (85), 14 states have call successors, (17), 1 states have call predecessors, (17), 11 states have return successors, (23), 11 states have call predecessors, (23), 14 states have call successors, (23) [2023-02-16 02:58:02,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:58:02,455 INFO L93 Difference]: Finished difference Result 150 states and 195 transitions. [2023-02-16 02:58:02,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-16 02:58:02,455 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.5) internal successors, (85), 28 states have internal predecessors, (85), 14 states have call successors, (17), 1 states have call predecessors, (17), 11 states have return successors, (23), 11 states have call predecessors, (23), 14 states have call successors, (23) Word has length 74 [2023-02-16 02:58:02,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:58:02,456 INFO L225 Difference]: With dead ends: 150 [2023-02-16 02:58:02,456 INFO L226 Difference]: Without dead ends: 146 [2023-02-16 02:58:02,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 130 SyntacticMatches, 18 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=229, Invalid=1933, Unknown=0, NotChecked=0, Total=2162 [2023-02-16 02:58:02,457 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 56 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 02:58:02,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 583 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 02:58:02,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-02-16 02:58:02,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 123. [2023-02-16 02:58:02,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 86 states have (on average 1.069767441860465) internal successors, (92), 80 states have internal predecessors, (92), 10 states have call successors, (10), 4 states have call predecessors, (10), 26 states have return successors, (59), 38 states have call predecessors, (59), 10 states have call successors, (59) [2023-02-16 02:58:02,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 161 transitions. [2023-02-16 02:58:02,463 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 161 transitions. Word has length 74 [2023-02-16 02:58:02,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:58:02,463 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 161 transitions. [2023-02-16 02:58:02,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.5) internal successors, (85), 28 states have internal predecessors, (85), 14 states have call successors, (17), 1 states have call predecessors, (17), 11 states have return successors, (23), 11 states have call predecessors, (23), 14 states have call successors, (23) [2023-02-16 02:58:02,464 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 161 transitions. [2023-02-16 02:58:02,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-16 02:58:02,464 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:58:02,464 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:58:02,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-02-16 02:58:02,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:58:02,670 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:58:02,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:58:02,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1898709812, now seen corresponding path program 8 times [2023-02-16 02:58:02,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:58:02,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370801559] [2023-02-16 02:58:02,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:58:02,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:58:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:58:02,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:58:02,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:58:02,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:58:02,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:58:02,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:58:02,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:58:02,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:58:02,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:58:02,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:58:02,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:58:02,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-16 02:58:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:58:03,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:58:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:58:03,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:58:03,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:58:03,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:58:03,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:58:03,112 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 40 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-16 02:58:03,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:58:03,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370801559] [2023-02-16 02:58:03,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370801559] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:58:03,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937800497] [2023-02-16 02:58:03,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 02:58:03,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:58:03,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:58:03,138 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:58:03,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-02-16 02:58:03,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 02:58:03,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:58:03,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-16 02:58:03,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:58:03,956 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 16 proven. 48 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-16 02:58:03,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:58:06,284 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 1 proven. 84 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-16 02:58:06,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937800497] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:58:06,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:58:06,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 25] total 46 [2023-02-16 02:58:06,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128653892] [2023-02-16 02:58:06,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:58:06,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-16 02:58:06,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:58:06,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-16 02:58:06,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1923, Unknown=0, NotChecked=0, Total=2070 [2023-02-16 02:58:06,286 INFO L87 Difference]: Start difference. First operand 123 states and 161 transitions. Second operand has 46 states, 44 states have (on average 2.227272727272727) internal successors, (98), 36 states have internal predecessors, (98), 18 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (25), 14 states have call predecessors, (25), 18 states have call successors, (25) [2023-02-16 02:58:06,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:58:06,999 INFO L93 Difference]: Finished difference Result 157 states and 203 transitions. [2023-02-16 02:58:07,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-16 02:58:07,000 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 2.227272727272727) internal successors, (98), 36 states have internal predecessors, (98), 18 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (25), 14 states have call predecessors, (25), 18 states have call successors, (25) Word has length 74 [2023-02-16 02:58:07,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:58:07,001 INFO L225 Difference]: With dead ends: 157 [2023-02-16 02:58:07,001 INFO L226 Difference]: Without dead ends: 153 [2023-02-16 02:58:07,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 124 SyntacticMatches, 14 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=371, Invalid=3051, Unknown=0, NotChecked=0, Total=3422 [2023-02-16 02:58:07,002 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 61 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 02:58:07,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 717 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 02:58:07,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-02-16 02:58:07,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 120. [2023-02-16 02:58:07,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 84 states have (on average 1.0714285714285714) internal successors, (90), 78 states have internal predecessors, (90), 10 states have call successors, (10), 4 states have call predecessors, (10), 25 states have return successors, (56), 37 states have call predecessors, (56), 10 states have call successors, (56) [2023-02-16 02:58:07,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 156 transitions. [2023-02-16 02:58:07,007 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 156 transitions. Word has length 74 [2023-02-16 02:58:07,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:58:07,007 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 156 transitions. [2023-02-16 02:58:07,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 2.227272727272727) internal successors, (98), 36 states have internal predecessors, (98), 18 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (25), 14 states have call predecessors, (25), 18 states have call successors, (25) [2023-02-16 02:58:07,007 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 156 transitions. [2023-02-16 02:58:07,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-16 02:58:07,008 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:58:07,008 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:58:07,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-02-16 02:58:07,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-02-16 02:58:07,215 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:58:07,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:58:07,216 INFO L85 PathProgramCache]: Analyzing trace with hash -437615564, now seen corresponding path program 31 times [2023-02-16 02:58:07,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:58:07,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048778554] [2023-02-16 02:58:07,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:58:07,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:58:07,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:58:07,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:58:07,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:58:07,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:58:07,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:58:07,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:58:07,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:58:07,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:58:07,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:58:07,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:58:07,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:58:07,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-16 02:58:07,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:58:07,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:58:07,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:58:07,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:58:07,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:58:07,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:58:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:58:07,705 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 19 proven. 35 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-16 02:58:07,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:58:07,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048778554] [2023-02-16 02:58:07,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048778554] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:58:07,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088336733] [2023-02-16 02:58:07,705 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 02:58:07,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:58:07,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:58:07,707 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:58:07,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-02-16 02:58:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:58:08,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-16 02:58:08,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:58:08,623 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-16 02:58:08,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:58:17,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088336733] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:58:17,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:58:17,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 37 [2023-02-16 02:58:17,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728851877] [2023-02-16 02:58:17,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:58:17,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-16 02:58:17,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:58:17,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-16 02:58:17,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=2260, Unknown=3, NotChecked=0, Total=2450 [2023-02-16 02:58:17,286 INFO L87 Difference]: Start difference. First operand 120 states and 156 transitions. Second operand has 37 states, 32 states have (on average 2.03125) internal successors, (65), 27 states have internal predecessors, (65), 11 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2023-02-16 02:58:17,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:58:17,983 INFO L93 Difference]: Finished difference Result 186 states and 248 transitions. [2023-02-16 02:58:17,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-16 02:58:17,983 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 32 states have (on average 2.03125) internal successors, (65), 27 states have internal predecessors, (65), 11 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) Word has length 74 [2023-02-16 02:58:17,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:58:17,984 INFO L225 Difference]: With dead ends: 186 [2023-02-16 02:58:17,984 INFO L226 Difference]: Without dead ends: 182 [2023-02-16 02:58:17,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 97 SyntacticMatches, 10 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=388, Invalid=3515, Unknown=3, NotChecked=0, Total=3906 [2023-02-16 02:58:17,985 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 40 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 02:58:17,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 638 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 02:58:17,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-02-16 02:58:17,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 127. [2023-02-16 02:58:17,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 89 states have (on average 1.0674157303370786) internal successors, (95), 82 states have internal predecessors, (95), 10 states have call successors, (10), 4 states have call predecessors, (10), 27 states have return successors, (62), 40 states have call predecessors, (62), 10 states have call successors, (62) [2023-02-16 02:58:17,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 167 transitions. [2023-02-16 02:58:17,991 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 167 transitions. Word has length 74 [2023-02-16 02:58:17,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:58:17,991 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 167 transitions. [2023-02-16 02:58:17,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 32 states have (on average 2.03125) internal successors, (65), 27 states have internal predecessors, (65), 11 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2023-02-16 02:58:17,991 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 167 transitions. [2023-02-16 02:58:17,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-16 02:58:17,992 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:58:17,992 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:58:18,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-02-16 02:58:18,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:58:18,199 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:58:18,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:58:18,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1410533388, now seen corresponding path program 32 times [2023-02-16 02:58:18,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:58:18,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917265606] [2023-02-16 02:58:18,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:58:18,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:58:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:58:18,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:58:18,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:58:18,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:58:18,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:58:18,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:58:18,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:58:18,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:58:18,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:58:18,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:58:18,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:58:18,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-16 02:58:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:58:18,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:58:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:58:18,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:58:18,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:58:18,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:58:18,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:58:18,638 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 43 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-16 02:58:18,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:58:18,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917265606] [2023-02-16 02:58:18,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917265606] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:58:18,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289230191] [2023-02-16 02:58:18,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 02:58:18,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:58:18,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:58:18,640 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:58:18,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-02-16 02:58:19,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 02:58:19,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:58:19,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-16 02:58:19,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:58:19,651 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-16 02:58:19,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:58:43,721 WARN L233 SmtUtils]: Spent 9.26s on a formula simplification. DAG size of input: 85 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 02:58:59,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289230191] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:58:59,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:58:59,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 39 [2023-02-16 02:58:59,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551824790] [2023-02-16 02:58:59,687 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:58:59,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-16 02:58:59,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:58:59,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-16 02:58:59,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=2657, Unknown=8, NotChecked=0, Total=2862 [2023-02-16 02:58:59,688 INFO L87 Difference]: Start difference. First operand 127 states and 167 transitions. Second operand has 39 states, 33 states have (on average 2.0) internal successors, (66), 29 states have internal predecessors, (66), 13 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2023-02-16 02:59:00,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:59:00,453 INFO L93 Difference]: Finished difference Result 198 states and 267 transitions. [2023-02-16 02:59:00,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-16 02:59:00,454 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 33 states have (on average 2.0) internal successors, (66), 29 states have internal predecessors, (66), 13 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) Word has length 74 [2023-02-16 02:59:00,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:59:00,455 INFO L225 Difference]: With dead ends: 198 [2023-02-16 02:59:00,455 INFO L226 Difference]: Without dead ends: 194 [2023-02-16 02:59:00,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 94 SyntacticMatches, 9 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 38.8s TimeCoverageRelationStatistics Valid=395, Invalid=4019, Unknown=8, NotChecked=0, Total=4422 [2023-02-16 02:59:00,457 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 40 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 02:59:00,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 677 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 02:59:00,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-02-16 02:59:00,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 130. [2023-02-16 02:59:00,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 91 states have (on average 1.065934065934066) internal successors, (97), 84 states have internal predecessors, (97), 10 states have call successors, (10), 4 states have call predecessors, (10), 28 states have return successors, (64), 41 states have call predecessors, (64), 10 states have call successors, (64) [2023-02-16 02:59:00,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 171 transitions. [2023-02-16 02:59:00,471 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 171 transitions. Word has length 74 [2023-02-16 02:59:00,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:59:00,472 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 171 transitions. [2023-02-16 02:59:00,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 33 states have (on average 2.0) internal successors, (66), 29 states have internal predecessors, (66), 13 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2023-02-16 02:59:00,472 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 171 transitions. [2023-02-16 02:59:00,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-16 02:59:00,473 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:59:00,473 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:59:00,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-02-16 02:59:00,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-02-16 02:59:00,680 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:59:00,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:59:00,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1425316748, now seen corresponding path program 33 times [2023-02-16 02:59:00,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:59:00,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364078790] [2023-02-16 02:59:00,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:59:00,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:59:00,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:00,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:59:00,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:00,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:00,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:00,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:00,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:00,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:00,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:00,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:00,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:00,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-16 02:59:00,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:00,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:59:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:01,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:59:01,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:01,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:59:01,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-16 02:59:01,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:59:01,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364078790] [2023-02-16 02:59:01,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364078790] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:59:01,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143865698] [2023-02-16 02:59:01,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 02:59:01,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:59:01,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:59:01,053 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:59:01,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-02-16 02:59:01,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-16 02:59:01,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:59:01,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-16 02:59:01,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:59:01,873 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 35 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-02-16 02:59:01,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:59:05,045 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 3 proven. 77 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-16 02:59:05,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143865698] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:59:05,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:59:05,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 27] total 53 [2023-02-16 02:59:05,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633259177] [2023-02-16 02:59:05,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:59:05,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-16 02:59:05,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:59:05,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-16 02:59:05,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=2588, Unknown=0, NotChecked=0, Total=2756 [2023-02-16 02:59:05,056 INFO L87 Difference]: Start difference. First operand 130 states and 171 transitions. Second operand has 53 states, 50 states have (on average 2.16) internal successors, (108), 39 states have internal predecessors, (108), 18 states have call successors, (21), 1 states have call predecessors, (21), 17 states have return successors, (26), 18 states have call predecessors, (26), 18 states have call successors, (26) [2023-02-16 02:59:05,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:59:05,725 INFO L93 Difference]: Finished difference Result 186 states and 255 transitions. [2023-02-16 02:59:05,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-16 02:59:05,725 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 2.16) internal successors, (108), 39 states have internal predecessors, (108), 18 states have call successors, (21), 1 states have call predecessors, (21), 17 states have return successors, (26), 18 states have call predecessors, (26), 18 states have call successors, (26) Word has length 74 [2023-02-16 02:59:05,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:59:05,726 INFO L225 Difference]: With dead ends: 186 [2023-02-16 02:59:05,726 INFO L226 Difference]: Without dead ends: 182 [2023-02-16 02:59:05,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 122 SyntacticMatches, 9 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=339, Invalid=3951, Unknown=0, NotChecked=0, Total=4290 [2023-02-16 02:59:05,727 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 31 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 1462 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 1467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 02:59:05,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 870 Invalid, 1467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1462 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 02:59:05,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-02-16 02:59:05,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 134. [2023-02-16 02:59:05,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 94 states have (on average 1.0638297872340425) internal successors, (100), 86 states have internal predecessors, (100), 10 states have call successors, (10), 4 states have call predecessors, (10), 29 states have return successors, (67), 43 states have call predecessors, (67), 10 states have call successors, (67) [2023-02-16 02:59:05,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 177 transitions. [2023-02-16 02:59:05,761 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 177 transitions. Word has length 74 [2023-02-16 02:59:05,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:59:05,762 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 177 transitions. [2023-02-16 02:59:05,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 2.16) internal successors, (108), 39 states have internal predecessors, (108), 18 states have call successors, (21), 1 states have call predecessors, (21), 17 states have return successors, (26), 18 states have call predecessors, (26), 18 states have call successors, (26) [2023-02-16 02:59:05,762 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 177 transitions. [2023-02-16 02:59:05,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-16 02:59:05,763 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:59:05,763 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:59:05,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-02-16 02:59:05,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:59:05,970 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:59:05,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:59:05,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1073359060, now seen corresponding path program 34 times [2023-02-16 02:59:05,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:59:05,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754252114] [2023-02-16 02:59:05,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:59:05,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:59:05,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:06,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:59:06,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:06,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:06,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:06,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:06,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:06,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:06,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:06,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:06,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-16 02:59:06,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:06,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:59:06,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:06,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:59:06,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:06,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:59:06,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:06,372 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 46 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-16 02:59:06,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:59:06,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754252114] [2023-02-16 02:59:06,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754252114] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:59:06,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552001821] [2023-02-16 02:59:06,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 02:59:06,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:59:06,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:59:06,374 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:59:06,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-02-16 02:59:06,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 02:59:06,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:59:06,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-16 02:59:07,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:59:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-02-16 02:59:07,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:59:10,099 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 76 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-16 02:59:10,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552001821] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:59:10,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:59:10,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 27] total 58 [2023-02-16 02:59:10,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877336031] [2023-02-16 02:59:10,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:59:10,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-02-16 02:59:10,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:59:10,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-02-16 02:59:10,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=3118, Unknown=0, NotChecked=0, Total=3306 [2023-02-16 02:59:10,101 INFO L87 Difference]: Start difference. First operand 134 states and 177 transitions. Second operand has 58 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 43 states have internal predecessors, (109), 21 states have call successors, (22), 1 states have call predecessors, (22), 19 states have return successors, (27), 19 states have call predecessors, (27), 21 states have call successors, (27) [2023-02-16 02:59:11,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:59:11,081 INFO L93 Difference]: Finished difference Result 221 states and 300 transitions. [2023-02-16 02:59:11,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-16 02:59:11,081 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 43 states have internal predecessors, (109), 21 states have call successors, (22), 1 states have call predecessors, (22), 19 states have return successors, (27), 19 states have call predecessors, (27), 21 states have call successors, (27) Word has length 74 [2023-02-16 02:59:11,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:59:11,082 INFO L225 Difference]: With dead ends: 221 [2023-02-16 02:59:11,082 INFO L226 Difference]: Without dead ends: 217 [2023-02-16 02:59:11,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 120 SyntacticMatches, 7 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=459, Invalid=5393, Unknown=0, NotChecked=0, Total=5852 [2023-02-16 02:59:11,083 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 86 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 1533 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 1609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-16 02:59:11,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 977 Invalid, 1609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1533 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-16 02:59:11,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2023-02-16 02:59:11,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 120. [2023-02-16 02:59:11,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 84 states have (on average 1.0714285714285714) internal successors, (90), 78 states have internal predecessors, (90), 10 states have call successors, (10), 4 states have call predecessors, (10), 25 states have return successors, (55), 37 states have call predecessors, (55), 10 states have call successors, (55) [2023-02-16 02:59:11,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 155 transitions. [2023-02-16 02:59:11,090 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 155 transitions. Word has length 74 [2023-02-16 02:59:11,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:59:11,091 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 155 transitions. [2023-02-16 02:59:11,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 43 states have internal predecessors, (109), 21 states have call successors, (22), 1 states have call predecessors, (22), 19 states have return successors, (27), 19 states have call predecessors, (27), 21 states have call successors, (27) [2023-02-16 02:59:11,091 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 155 transitions. [2023-02-16 02:59:11,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-16 02:59:11,091 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:59:11,092 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:59:11,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-02-16 02:59:11,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:59:11,299 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:59:11,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:59:11,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1262966316, now seen corresponding path program 35 times [2023-02-16 02:59:11,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:59:11,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879808154] [2023-02-16 02:59:11,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:59:11,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:59:11,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:11,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:59:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:11,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:11,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:11,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:11,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:11,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:11,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:11,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:11,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:11,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-16 02:59:11,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:11,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:59:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:11,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:59:11,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:11,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:59:11,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:11,693 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-16 02:59:11,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:59:11,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879808154] [2023-02-16 02:59:11,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879808154] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:59:11,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194574147] [2023-02-16 02:59:11,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 02:59:11,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:59:11,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:59:11,710 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:59:11,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-02-16 02:59:12,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-16 02:59:12,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:59:12,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-16 02:59:12,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:59:12,557 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-16 02:59:12,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:59:14,334 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-16 02:59:14,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194574147] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:59:14,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:59:14,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 24] total 35 [2023-02-16 02:59:14,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184621197] [2023-02-16 02:59:14,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:59:14,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-16 02:59:14,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:59:14,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-16 02:59:14,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2023-02-16 02:59:14,336 INFO L87 Difference]: Start difference. First operand 120 states and 155 transitions. Second operand has 35 states, 34 states have (on average 2.5) internal successors, (85), 28 states have internal predecessors, (85), 14 states have call successors, (17), 1 states have call predecessors, (17), 11 states have return successors, (23), 11 states have call predecessors, (23), 14 states have call successors, (23) [2023-02-16 02:59:14,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:59:14,817 INFO L93 Difference]: Finished difference Result 154 states and 199 transitions. [2023-02-16 02:59:14,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-16 02:59:14,817 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.5) internal successors, (85), 28 states have internal predecessors, (85), 14 states have call successors, (17), 1 states have call predecessors, (17), 11 states have return successors, (23), 11 states have call predecessors, (23), 14 states have call successors, (23) Word has length 74 [2023-02-16 02:59:14,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:59:14,818 INFO L225 Difference]: With dead ends: 154 [2023-02-16 02:59:14,818 INFO L226 Difference]: Without dead ends: 150 [2023-02-16 02:59:14,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 127 SyntacticMatches, 21 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=229, Invalid=1933, Unknown=0, NotChecked=0, Total=2162 [2023-02-16 02:59:14,819 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 45 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 02:59:14,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 574 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 02:59:14,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-02-16 02:59:14,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 127. [2023-02-16 02:59:14,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 89 states have (on average 1.0674157303370786) internal successors, (95), 82 states have internal predecessors, (95), 10 states have call successors, (10), 4 states have call predecessors, (10), 27 states have return successors, (61), 40 states have call predecessors, (61), 10 states have call successors, (61) [2023-02-16 02:59:14,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 166 transitions. [2023-02-16 02:59:14,842 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 166 transitions. Word has length 74 [2023-02-16 02:59:14,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:59:14,842 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 166 transitions. [2023-02-16 02:59:14,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.5) internal successors, (85), 28 states have internal predecessors, (85), 14 states have call successors, (17), 1 states have call predecessors, (17), 11 states have return successors, (23), 11 states have call predecessors, (23), 14 states have call successors, (23) [2023-02-16 02:59:14,842 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 166 transitions. [2023-02-16 02:59:14,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-16 02:59:14,843 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:59:14,843 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:59:14,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-02-16 02:59:15,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-02-16 02:59:15,050 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:59:15,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:59:15,051 INFO L85 PathProgramCache]: Analyzing trace with hash 2059083156, now seen corresponding path program 36 times [2023-02-16 02:59:15,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:59:15,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883211297] [2023-02-16 02:59:15,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:59:15,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:59:15,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:15,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:59:15,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:15,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:15,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:15,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:15,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:15,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:15,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:15,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:15,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:15,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-16 02:59:15,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:15,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:59:15,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:15,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:59:15,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:15,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:59:15,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:15,451 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-02-16 02:59:15,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:59:15,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883211297] [2023-02-16 02:59:15,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883211297] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:59:15,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059481174] [2023-02-16 02:59:15,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 02:59:15,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:59:15,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:59:15,453 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:59:15,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-02-16 02:59:16,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-16 02:59:16,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:59:16,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-16 02:59:16,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:59:16,454 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 41 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-16 02:59:16,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:59:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-16 02:59:18,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059481174] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:59:18,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:59:18,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 27] total 47 [2023-02-16 02:59:18,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924825921] [2023-02-16 02:59:18,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:59:18,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-16 02:59:18,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:59:18,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-16 02:59:18,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2015, Unknown=0, NotChecked=0, Total=2162 [2023-02-16 02:59:18,670 INFO L87 Difference]: Start difference. First operand 127 states and 166 transitions. Second operand has 47 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 37 states have internal predecessors, (97), 18 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (25), 14 states have call predecessors, (25), 18 states have call successors, (25) [2023-02-16 02:59:19,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:59:19,425 INFO L93 Difference]: Finished difference Result 201 states and 271 transitions. [2023-02-16 02:59:19,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-16 02:59:19,425 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 37 states have internal predecessors, (97), 18 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (25), 14 states have call predecessors, (25), 18 states have call successors, (25) Word has length 74 [2023-02-16 02:59:19,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:59:19,429 INFO L225 Difference]: With dead ends: 201 [2023-02-16 02:59:19,429 INFO L226 Difference]: Without dead ends: 197 [2023-02-16 02:59:19,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 117 SyntacticMatches, 20 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=400, Invalid=3506, Unknown=0, NotChecked=0, Total=3906 [2023-02-16 02:59:19,430 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 61 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 1313 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 1350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-16 02:59:19,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 807 Invalid, 1350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-16 02:59:19,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-02-16 02:59:19,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 120. [2023-02-16 02:59:19,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 84 states have (on average 1.0714285714285714) internal successors, (90), 78 states have internal predecessors, (90), 10 states have call successors, (10), 4 states have call predecessors, (10), 25 states have return successors, (56), 37 states have call predecessors, (56), 10 states have call successors, (56) [2023-02-16 02:59:19,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 156 transitions. [2023-02-16 02:59:19,453 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 156 transitions. Word has length 74 [2023-02-16 02:59:19,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:59:19,454 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 156 transitions. [2023-02-16 02:59:19,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 37 states have internal predecessors, (97), 18 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (25), 14 states have call predecessors, (25), 18 states have call successors, (25) [2023-02-16 02:59:19,454 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 156 transitions. [2023-02-16 02:59:19,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-02-16 02:59:19,455 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:59:19,455 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:59:19,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-02-16 02:59:19,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-02-16 02:59:19,662 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:59:19,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:59:19,663 INFO L85 PathProgramCache]: Analyzing trace with hash 256823296, now seen corresponding path program 37 times [2023-02-16 02:59:19,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:59:19,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019805328] [2023-02-16 02:59:19,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:59:19,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:59:19,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:19,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:59:19,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:19,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:19,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:19,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:19,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:19,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:19,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:19,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:19,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:19,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-16 02:59:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:20,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:59:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:20,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:59:20,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:20,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:59:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:20,143 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 33 proven. 48 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-02-16 02:59:20,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:59:20,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019805328] [2023-02-16 02:59:20,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019805328] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:59:20,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269902638] [2023-02-16 02:59:20,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 02:59:20,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:59:20,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:59:20,145 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:59:20,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-02-16 02:59:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:20,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-16 02:59:20,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:59:21,199 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 28 proven. 54 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-16 02:59:21,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:59:24,215 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 7 proven. 103 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-16 02:59:24,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269902638] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:59:24,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:59:24,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 29] total 49 [2023-02-16 02:59:24,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045556451] [2023-02-16 02:59:24,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:59:24,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-16 02:59:24,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:59:24,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-16 02:59:24,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2191, Unknown=0, NotChecked=0, Total=2352 [2023-02-16 02:59:24,217 INFO L87 Difference]: Start difference. First operand 120 states and 156 transitions. Second operand has 49 states, 47 states have (on average 2.25531914893617) internal successors, (106), 37 states have internal predecessors, (106), 19 states have call successors, (21), 1 states have call predecessors, (21), 14 states have return successors, (28), 16 states have call predecessors, (28), 19 states have call successors, (28) [2023-02-16 02:59:24,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:59:24,973 INFO L93 Difference]: Finished difference Result 185 states and 242 transitions. [2023-02-16 02:59:24,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-16 02:59:24,974 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 2.25531914893617) internal successors, (106), 37 states have internal predecessors, (106), 19 states have call successors, (21), 1 states have call predecessors, (21), 14 states have return successors, (28), 16 states have call predecessors, (28), 19 states have call successors, (28) Word has length 82 [2023-02-16 02:59:24,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:59:24,975 INFO L225 Difference]: With dead ends: 185 [2023-02-16 02:59:24,975 INFO L226 Difference]: Without dead ends: 181 [2023-02-16 02:59:24,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 140 SyntacticMatches, 15 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=497, Invalid=3925, Unknown=0, NotChecked=0, Total=4422 [2023-02-16 02:59:24,976 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 24 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 1234 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 1241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 02:59:24,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 874 Invalid, 1241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1234 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 02:59:24,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-02-16 02:59:24,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 119. [2023-02-16 02:59:24,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 83 states have (on average 1.072289156626506) internal successors, (89), 78 states have internal predecessors, (89), 10 states have call successors, (10), 4 states have call predecessors, (10), 25 states have return successors, (56), 36 states have call predecessors, (56), 10 states have call successors, (56) [2023-02-16 02:59:24,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 155 transitions. [2023-02-16 02:59:24,982 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 155 transitions. Word has length 82 [2023-02-16 02:59:24,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:59:24,982 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 155 transitions. [2023-02-16 02:59:24,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 2.25531914893617) internal successors, (106), 37 states have internal predecessors, (106), 19 states have call successors, (21), 1 states have call predecessors, (21), 14 states have return successors, (28), 16 states have call predecessors, (28), 19 states have call successors, (28) [2023-02-16 02:59:24,982 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 155 transitions. [2023-02-16 02:59:24,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-02-16 02:59:24,983 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:59:24,983 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:59:25,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-02-16 02:59:25,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-02-16 02:59:25,191 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:59:25,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:59:25,192 INFO L85 PathProgramCache]: Analyzing trace with hash 823420064, now seen corresponding path program 38 times [2023-02-16 02:59:25,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:59:25,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873168935] [2023-02-16 02:59:25,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:59:25,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:59:25,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:25,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:59:25,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:25,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:25,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:25,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:25,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:25,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:25,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:25,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:25,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:25,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:25,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-16 02:59:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:25,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:59:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:25,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:59:25,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:25,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:59:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:25,609 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 28 proven. 49 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-02-16 02:59:25,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:59:25,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873168935] [2023-02-16 02:59:25,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873168935] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:59:25,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846994840] [2023-02-16 02:59:25,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 02:59:25,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:59:25,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:59:25,611 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:59:25,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-02-16 02:59:26,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 02:59:26,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:59:26,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-16 02:59:26,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:59:26,765 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-02-16 02:59:26,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:59:29,862 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 11 proven. 97 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-16 02:59:29,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846994840] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:59:29,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:59:29,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 32] total 58 [2023-02-16 02:59:29,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085660483] [2023-02-16 02:59:29,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:59:29,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-02-16 02:59:29,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:59:29,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-02-16 02:59:29,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=3077, Unknown=0, NotChecked=0, Total=3306 [2023-02-16 02:59:29,864 INFO L87 Difference]: Start difference. First operand 119 states and 155 transitions. Second operand has 58 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 44 states have internal predecessors, (109), 20 states have call successors, (22), 1 states have call predecessors, (22), 15 states have return successors, (30), 18 states have call predecessors, (30), 20 states have call successors, (30) [2023-02-16 02:59:30,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:59:30,900 INFO L93 Difference]: Finished difference Result 207 states and 287 transitions. [2023-02-16 02:59:30,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-16 02:59:30,901 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 44 states have internal predecessors, (109), 20 states have call successors, (22), 1 states have call predecessors, (22), 15 states have return successors, (30), 18 states have call predecessors, (30), 20 states have call successors, (30) Word has length 82 [2023-02-16 02:59:30,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:59:30,901 INFO L225 Difference]: With dead ends: 207 [2023-02-16 02:59:30,901 INFO L226 Difference]: Without dead ends: 203 [2023-02-16 02:59:30,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 133 SyntacticMatches, 14 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1458 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=582, Invalid=4968, Unknown=0, NotChecked=0, Total=5550 [2023-02-16 02:59:30,902 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 68 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 1396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-16 02:59:30,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 882 Invalid, 1396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-16 02:59:30,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-02-16 02:59:30,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 119. [2023-02-16 02:59:30,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 83 states have (on average 1.072289156626506) internal successors, (89), 78 states have internal predecessors, (89), 10 states have call successors, (10), 4 states have call predecessors, (10), 25 states have return successors, (56), 36 states have call predecessors, (56), 10 states have call successors, (56) [2023-02-16 02:59:30,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 155 transitions. [2023-02-16 02:59:30,924 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 155 transitions. Word has length 82 [2023-02-16 02:59:30,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:59:30,925 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 155 transitions. [2023-02-16 02:59:30,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 44 states have internal predecessors, (109), 20 states have call successors, (22), 1 states have call predecessors, (22), 15 states have return successors, (30), 18 states have call predecessors, (30), 20 states have call successors, (30) [2023-02-16 02:59:30,925 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 155 transitions. [2023-02-16 02:59:30,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-02-16 02:59:30,926 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:59:30,926 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:59:30,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-02-16 02:59:31,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-02-16 02:59:31,133 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:59:31,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:59:31,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1271964480, now seen corresponding path program 39 times [2023-02-16 02:59:31,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:59:31,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054193656] [2023-02-16 02:59:31,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:59:31,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:59:31,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:31,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:59:31,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:31,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:31,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:31,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:31,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:31,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:31,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:31,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:31,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:31,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:31,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:31,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-16 02:59:31,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:31,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:59:31,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:31,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:59:31,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:31,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:59:31,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:31,691 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 24 proven. 53 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-02-16 02:59:31,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:59:31,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054193656] [2023-02-16 02:59:31,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054193656] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:59:31,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914316853] [2023-02-16 02:59:31,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 02:59:31,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:59:31,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:59:31,705 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:59:31,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-02-16 02:59:32,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-16 02:59:32,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:59:32,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 51 conjunts are in the unsatisfiable core [2023-02-16 02:59:32,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:59:33,044 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 34 proven. 49 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-02-16 02:59:33,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:59:37,033 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 5 proven. 103 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-16 02:59:37,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914316853] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:59:37,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:59:37,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 31] total 60 [2023-02-16 02:59:37,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253828697] [2023-02-16 02:59:37,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:59:37,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-02-16 02:59:37,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:59:37,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-02-16 02:59:37,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=3308, Unknown=0, NotChecked=0, Total=3540 [2023-02-16 02:59:37,036 INFO L87 Difference]: Start difference. First operand 119 states and 155 transitions. Second operand has 60 states, 53 states have (on average 2.150943396226415) internal successors, (114), 45 states have internal predecessors, (114), 22 states have call successors, (24), 1 states have call predecessors, (24), 16 states have return successors, (30), 19 states have call predecessors, (30), 22 states have call successors, (30) [2023-02-16 02:59:38,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:59:38,659 INFO L93 Difference]: Finished difference Result 225 states and 306 transitions. [2023-02-16 02:59:38,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-16 02:59:38,659 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 53 states have (on average 2.150943396226415) internal successors, (114), 45 states have internal predecessors, (114), 22 states have call successors, (24), 1 states have call predecessors, (24), 16 states have return successors, (30), 19 states have call predecessors, (30), 22 states have call successors, (30) Word has length 82 [2023-02-16 02:59:38,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:59:38,660 INFO L225 Difference]: With dead ends: 225 [2023-02-16 02:59:38,660 INFO L226 Difference]: Without dead ends: 221 [2023-02-16 02:59:38,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 131 SyntacticMatches, 15 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1564 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=768, Invalid=6038, Unknown=0, NotChecked=0, Total=6806 [2023-02-16 02:59:38,661 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 65 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 2138 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1177 SdHoareTripleChecker+Invalid, 2187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-16 02:59:38,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 1177 Invalid, 2187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 2138 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-16 02:59:38,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-02-16 02:59:38,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 109. [2023-02-16 02:59:38,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 76 states have (on average 1.0789473684210527) internal successors, (82), 72 states have internal predecessors, (82), 10 states have call successors, (10), 4 states have call predecessors, (10), 22 states have return successors, (48), 32 states have call predecessors, (48), 10 states have call successors, (48) [2023-02-16 02:59:38,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 140 transitions. [2023-02-16 02:59:38,670 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 140 transitions. Word has length 82 [2023-02-16 02:59:38,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:59:38,670 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 140 transitions. [2023-02-16 02:59:38,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 53 states have (on average 2.150943396226415) internal successors, (114), 45 states have internal predecessors, (114), 22 states have call successors, (24), 1 states have call predecessors, (24), 16 states have return successors, (30), 19 states have call predecessors, (30), 22 states have call successors, (30) [2023-02-16 02:59:38,670 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 140 transitions. [2023-02-16 02:59:38,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-02-16 02:59:38,671 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:59:38,671 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:59:38,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-02-16 02:59:38,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-02-16 02:59:38,881 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:59:38,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:59:38,881 INFO L85 PathProgramCache]: Analyzing trace with hash 920340064, now seen corresponding path program 40 times [2023-02-16 02:59:38,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:59:38,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299391876] [2023-02-16 02:59:38,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:59:38,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:59:38,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:38,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:59:38,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:39,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:39,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:39,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:39,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:39,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:39,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:39,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:39,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:39,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:39,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-16 02:59:39,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:39,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:59:39,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:39,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:59:39,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:39,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:59:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:39,347 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 24 proven. 55 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-16 02:59:39,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:59:39,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299391876] [2023-02-16 02:59:39,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299391876] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:59:39,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930673700] [2023-02-16 02:59:39,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 02:59:39,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:59:39,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:59:39,349 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:59:39,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-02-16 02:59:40,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 02:59:40,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:59:40,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-16 02:59:40,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:59:40,573 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-02-16 02:59:40,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:59:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 9 proven. 99 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-16 02:59:44,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930673700] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:59:44,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:59:44,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 30] total 63 [2023-02-16 02:59:44,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550192475] [2023-02-16 02:59:44,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:59:44,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-02-16 02:59:44,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:59:44,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-02-16 02:59:44,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=3699, Unknown=0, NotChecked=0, Total=3906 [2023-02-16 02:59:44,657 INFO L87 Difference]: Start difference. First operand 109 states and 140 transitions. Second operand has 63 states, 57 states have (on average 2.087719298245614) internal successors, (119), 45 states have internal predecessors, (119), 22 states have call successors, (25), 1 states have call predecessors, (25), 20 states have return successors, (30), 22 states have call predecessors, (30), 22 states have call successors, (30) [2023-02-16 02:59:46,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:59:46,273 INFO L93 Difference]: Finished difference Result 257 states and 352 transitions. [2023-02-16 02:59:46,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-16 02:59:46,273 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 57 states have (on average 2.087719298245614) internal successors, (119), 45 states have internal predecessors, (119), 22 states have call successors, (25), 1 states have call predecessors, (25), 20 states have return successors, (30), 22 states have call predecessors, (30), 22 states have call successors, (30) Word has length 82 [2023-02-16 02:59:46,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:59:46,274 INFO L225 Difference]: With dead ends: 257 [2023-02-16 02:59:46,279 INFO L226 Difference]: Without dead ends: 253 [2023-02-16 02:59:46,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 135 SyntacticMatches, 7 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=698, Invalid=7312, Unknown=0, NotChecked=0, Total=8010 [2023-02-16 02:59:46,280 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 95 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 1941 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-16 02:59:46,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 1098 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1941 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-16 02:59:46,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2023-02-16 02:59:46,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 90. [2023-02-16 02:59:46,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 62 states have (on average 1.096774193548387) internal successors, (68), 62 states have internal predecessors, (68), 10 states have call successors, (10), 4 states have call predecessors, (10), 17 states have return successors, (34), 23 states have call predecessors, (34), 10 states have call successors, (34) [2023-02-16 02:59:46,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2023-02-16 02:59:46,298 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 82 [2023-02-16 02:59:46,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:59:46,298 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2023-02-16 02:59:46,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 57 states have (on average 2.087719298245614) internal successors, (119), 45 states have internal predecessors, (119), 22 states have call successors, (25), 1 states have call predecessors, (25), 20 states have return successors, (30), 22 states have call predecessors, (30), 22 states have call successors, (30) [2023-02-16 02:59:46,299 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2023-02-16 02:59:46,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-02-16 02:59:46,316 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:59:46,316 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:59:46,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-02-16 02:59:46,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-02-16 02:59:46,517 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:59:46,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:59:46,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1935481248, now seen corresponding path program 41 times [2023-02-16 02:59:46,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:59:46,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545717961] [2023-02-16 02:59:46,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:59:46,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:59:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:46,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:59:46,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:46,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:46,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:46,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:46,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:46,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:46,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:46,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:46,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:46,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:46,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-16 02:59:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:46,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:59:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:46,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:59:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:47,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:59:47,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:47,045 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 25 proven. 57 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-16 02:59:47,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:59:47,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545717961] [2023-02-16 02:59:47,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545717961] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:59:47,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253235245] [2023-02-16 02:59:47,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 02:59:47,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:59:47,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:59:47,047 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:59:47,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-02-16 02:59:47,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-16 02:59:47,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:59:47,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-16 02:59:47,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:59:48,207 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 29 proven. 51 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-02-16 02:59:48,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:59:50,765 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 12 proven. 100 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-16 02:59:50,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253235245] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:59:50,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:59:50,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 31] total 49 [2023-02-16 02:59:50,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970656768] [2023-02-16 02:59:50,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:59:50,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-16 02:59:50,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:59:50,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-16 02:59:50,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2167, Unknown=0, NotChecked=0, Total=2352 [2023-02-16 02:59:50,768 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand has 49 states, 44 states have (on average 2.25) internal successors, (99), 38 states have internal predecessors, (99), 19 states have call successors, (20), 1 states have call predecessors, (20), 13 states have return successors, (27), 15 states have call predecessors, (27), 19 states have call successors, (27) [2023-02-16 02:59:51,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:59:51,406 INFO L93 Difference]: Finished difference Result 136 states and 176 transitions. [2023-02-16 02:59:51,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-16 02:59:51,407 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 44 states have (on average 2.25) internal successors, (99), 38 states have internal predecessors, (99), 19 states have call successors, (20), 1 states have call predecessors, (20), 13 states have return successors, (27), 15 states have call predecessors, (27), 19 states have call successors, (27) Word has length 82 [2023-02-16 02:59:51,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:59:51,408 INFO L225 Difference]: With dead ends: 136 [2023-02-16 02:59:51,408 INFO L226 Difference]: Without dead ends: 132 [2023-02-16 02:59:51,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 133 SyntacticMatches, 24 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1156 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=471, Invalid=3689, Unknown=0, NotChecked=0, Total=4160 [2023-02-16 02:59:51,408 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 57 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 1326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 02:59:51,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 865 Invalid, 1326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 02:59:51,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-02-16 02:59:51,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 72. [2023-02-16 02:59:51,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 50 states have (on average 1.12) internal successors, (56), 51 states have internal predecessors, (56), 9 states have call successors, (9), 4 states have call predecessors, (9), 12 states have return successors, (21), 16 states have call predecessors, (21), 9 states have call successors, (21) [2023-02-16 02:59:51,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2023-02-16 02:59:51,432 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 82 [2023-02-16 02:59:51,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:59:51,433 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2023-02-16 02:59:51,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 44 states have (on average 2.25) internal successors, (99), 38 states have internal predecessors, (99), 19 states have call successors, (20), 1 states have call predecessors, (20), 13 states have return successors, (27), 15 states have call predecessors, (27), 19 states have call successors, (27) [2023-02-16 02:59:51,433 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2023-02-16 02:59:51,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-16 02:59:51,433 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:59:51,434 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:59:51,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-02-16 02:59:51,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:59:51,646 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:59:51,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:59:51,646 INFO L85 PathProgramCache]: Analyzing trace with hash -152078404, now seen corresponding path program 9 times [2023-02-16 02:59:51,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:59:51,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172934434] [2023-02-16 02:59:51,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:59:51,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:59:51,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:51,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:59:51,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:51,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:51,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:51,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:51,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:51,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:51,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 02:59:51,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:51,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:59:51,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:52,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:59:52,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:52,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:59:52,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:52,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:59:52,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:52,152 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 13 proven. 49 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-16 02:59:52,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:59:52,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172934434] [2023-02-16 02:59:52,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172934434] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:59:52,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094604389] [2023-02-16 02:59:52,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 02:59:52,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:59:52,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:59:52,154 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:59:52,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-02-16 02:59:52,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-16 02:59:52,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:59:52,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-16 02:59:52,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:59:53,387 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 13 proven. 49 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-16 02:59:53,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:59:55,395 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-16 02:59:55,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094604389] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:59:55,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:59:55,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 26] total 47 [2023-02-16 02:59:55,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752373062] [2023-02-16 02:59:55,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:59:55,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-16 02:59:55,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:59:55,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-16 02:59:55,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2010, Unknown=0, NotChecked=0, Total=2162 [2023-02-16 02:59:55,397 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand has 47 states, 42 states have (on average 2.261904761904762) internal successors, (95), 38 states have internal predecessors, (95), 18 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (25), 14 states have call predecessors, (25), 18 states have call successors, (25) [2023-02-16 02:59:56,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:59:56,166 INFO L93 Difference]: Finished difference Result 98 states and 121 transitions. [2023-02-16 02:59:56,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-16 02:59:56,167 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 42 states have (on average 2.261904761904762) internal successors, (95), 38 states have internal predecessors, (95), 18 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (25), 14 states have call predecessors, (25), 18 states have call successors, (25) Word has length 73 [2023-02-16 02:59:56,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:59:56,167 INFO L225 Difference]: With dead ends: 98 [2023-02-16 02:59:56,167 INFO L226 Difference]: Without dead ends: 89 [2023-02-16 02:59:56,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 119 SyntacticMatches, 16 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=350, Invalid=3190, Unknown=0, NotChecked=0, Total=3540 [2023-02-16 02:59:56,168 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 94 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 02:59:56,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 677 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 02:59:56,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-16 02:59:56,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 77. [2023-02-16 02:59:56,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 55 states have internal predecessors, (59), 9 states have call successors, (9), 4 states have call predecessors, (9), 14 states have return successors, (25), 17 states have call predecessors, (25), 9 states have call successors, (25) [2023-02-16 02:59:56,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 93 transitions. [2023-02-16 02:59:56,172 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 93 transitions. Word has length 73 [2023-02-16 02:59:56,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:59:56,172 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 93 transitions. [2023-02-16 02:59:56,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 42 states have (on average 2.261904761904762) internal successors, (95), 38 states have internal predecessors, (95), 18 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (25), 14 states have call predecessors, (25), 18 states have call successors, (25) [2023-02-16 02:59:56,172 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 93 transitions. [2023-02-16 02:59:56,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-16 02:59:56,172 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:59:56,172 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:59:56,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-02-16 02:59:56,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:59:56,373 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:59:56,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:59:56,373 INFO L85 PathProgramCache]: Analyzing trace with hash 867896604, now seen corresponding path program 42 times [2023-02-16 02:59:56,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:59:56,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930556805] [2023-02-16 02:59:56,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:59:56,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:59:56,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:56,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 02:59:56,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:56,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:56,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:56,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:56,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:56,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:59:56,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:56,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 02:59:56,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:56,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:59:56,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:56,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:59:56,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:56,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:59:56,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:56,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:59:56,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:59:56,776 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-16 02:59:56,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:59:56,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930556805] [2023-02-16 02:59:56,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930556805] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:59:56,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190844114] [2023-02-16 02:59:56,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 02:59:56,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:59:56,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:59:56,790 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:59:56,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-02-16 02:59:57,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-16 02:59:57,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:59:57,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-16 02:59:57,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:59:57,982 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-16 02:59:57,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:59:59,636 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-16 02:59:59,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190844114] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:59:59,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:59:59,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 25] total 36 [2023-02-16 02:59:59,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566185242] [2023-02-16 02:59:59,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:59:59,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-16 02:59:59,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:59:59,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-16 02:59:59,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2023-02-16 02:59:59,637 INFO L87 Difference]: Start difference. First operand 77 states and 93 transitions. Second operand has 36 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 30 states have internal predecessors, (88), 15 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (23), 11 states have call predecessors, (23), 15 states have call successors, (23) [2023-02-16 03:00:00,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:00:00,012 INFO L93 Difference]: Finished difference Result 108 states and 133 transitions. [2023-02-16 03:00:00,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-16 03:00:00,012 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 30 states have internal predecessors, (88), 15 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (23), 11 states have call predecessors, (23), 15 states have call successors, (23) Word has length 73 [2023-02-16 03:00:00,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:00:00,013 INFO L225 Difference]: With dead ends: 108 [2023-02-16 03:00:00,013 INFO L226 Difference]: Without dead ends: 104 [2023-02-16 03:00:00,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 125 SyntacticMatches, 19 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=237, Invalid=2019, Unknown=0, NotChecked=0, Total=2256 [2023-02-16 03:00:00,014 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 75 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:00:00,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 637 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 03:00:00,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-02-16 03:00:00,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 88. [2023-02-16 03:00:00,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 60 states have (on average 1.1) internal successors, (66), 62 states have internal predecessors, (66), 10 states have call successors, (10), 4 states have call predecessors, (10), 17 states have return successors, (32), 21 states have call predecessors, (32), 10 states have call successors, (32) [2023-02-16 03:00:00,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2023-02-16 03:00:00,019 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 73 [2023-02-16 03:00:00,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:00:00,019 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2023-02-16 03:00:00,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 30 states have internal predecessors, (88), 15 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (23), 11 states have call predecessors, (23), 15 states have call successors, (23) [2023-02-16 03:00:00,019 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2023-02-16 03:00:00,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-16 03:00:00,020 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:00:00,020 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:00:00,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-02-16 03:00:00,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:00:00,229 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 03:00:00,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:00:00,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1057895076, now seen corresponding path program 43 times [2023-02-16 03:00:00,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:00:00,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834258390] [2023-02-16 03:00:00,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:00:00,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:00:00,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:00:00,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 03:00:00,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:00:00,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 03:00:00,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:00:00,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 03:00:00,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:00:00,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 03:00:00,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:00:00,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 03:00:00,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:00:00,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 03:00:00,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:00:00,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 03:00:00,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:00:00,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 03:00:00,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:00:00,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 03:00:00,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:00:00,564 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-16 03:00:00,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:00:00,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834258390] [2023-02-16 03:00:00,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834258390] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:00:00,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552364293] [2023-02-16 03:00:00,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 03:00:00,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:00:00,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:00:00,566 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:00:00,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-02-16 03:00:01,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:00:01,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-16 03:00:01,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:00:01,658 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-16 03:00:01,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:00:03,289 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-16 03:00:03,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552364293] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:00:03,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:00:03,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 25] total 36 [2023-02-16 03:00:03,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193604849] [2023-02-16 03:00:03,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:00:03,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-16 03:00:03,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:00:03,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-16 03:00:03,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2023-02-16 03:00:03,313 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand has 36 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 30 states have internal predecessors, (88), 15 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (23), 11 states have call predecessors, (23), 15 states have call successors, (23) [2023-02-16 03:00:03,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:00:03,741 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2023-02-16 03:00:03,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-16 03:00:03,742 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 30 states have internal predecessors, (88), 15 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (23), 11 states have call predecessors, (23), 15 states have call successors, (23) Word has length 73 [2023-02-16 03:00:03,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:00:03,742 INFO L225 Difference]: With dead ends: 116 [2023-02-16 03:00:03,742 INFO L226 Difference]: Without dead ends: 112 [2023-02-16 03:00:03,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 125 SyntacticMatches, 19 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=237, Invalid=2019, Unknown=0, NotChecked=0, Total=2256 [2023-02-16 03:00:03,743 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 57 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:00:03,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 603 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 03:00:03,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-16 03:00:03,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 92. [2023-02-16 03:00:03,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 64 states have internal predecessors, (69), 10 states have call successors, (10), 4 states have call predecessors, (10), 18 states have return successors, (34), 23 states have call predecessors, (34), 10 states have call successors, (34) [2023-02-16 03:00:03,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 113 transitions. [2023-02-16 03:00:03,759 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 113 transitions. Word has length 73 [2023-02-16 03:00:03,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:00:03,760 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 113 transitions. [2023-02-16 03:00:03,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 30 states have internal predecessors, (88), 15 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (23), 11 states have call predecessors, (23), 15 states have call successors, (23) [2023-02-16 03:00:03,761 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 113 transitions. [2023-02-16 03:00:03,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-16 03:00:03,762 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:00:03,762 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:00:03,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-02-16 03:00:03,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:00:03,972 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 03:00:03,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:00:03,972 INFO L85 PathProgramCache]: Analyzing trace with hash -37920068, now seen corresponding path program 44 times [2023-02-16 03:00:03,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:00:03,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495121953] [2023-02-16 03:00:03,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:00:03,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:00:03,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:00:04,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 03:00:04,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:00:04,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 03:00:04,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:00:04,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 03:00:04,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:00:04,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 03:00:04,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:00:04,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 03:00:04,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:00:04,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 03:00:04,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:00:04,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 03:00:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:00:04,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 03:00:04,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:00:04,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 03:00:04,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:00:04,495 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 47 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-16 03:00:04,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:00:04,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495121953] [2023-02-16 03:00:04,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495121953] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:00:04,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9896974] [2023-02-16 03:00:04,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:00:04,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:00:04,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:00:04,497 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:00:04,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-02-16 03:00:05,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 03:00:05,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:00:05,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 85 conjunts are in the unsatisfiable core [2023-02-16 03:00:05,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:00:05,951 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-16 03:00:05,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:00:06,949 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-16 03:00:06,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9896974] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:00:06,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:00:06,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 25] total 40 [2023-02-16 03:00:06,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486989656] [2023-02-16 03:00:06,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:00:06,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-16 03:00:06,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:00:06,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-16 03:00:06,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1442, Unknown=0, NotChecked=0, Total=1560 [2023-02-16 03:00:06,951 INFO L87 Difference]: Start difference. First operand 92 states and 113 transitions. Second operand has 40 states, 38 states have (on average 2.263157894736842) internal successors, (86), 34 states have internal predecessors, (86), 13 states have call successors, (13), 1 states have call predecessors, (13), 16 states have return successors, (24), 15 states have call predecessors, (24), 13 states have call successors, (24) [2023-02-16 03:00:07,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:00:07,702 INFO L93 Difference]: Finished difference Result 116 states and 146 transitions. [2023-02-16 03:00:07,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-16 03:00:07,716 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 2.263157894736842) internal successors, (86), 34 states have internal predecessors, (86), 13 states have call successors, (13), 1 states have call predecessors, (13), 16 states have return successors, (24), 15 states have call predecessors, (24), 13 states have call successors, (24) Word has length 73 [2023-02-16 03:00:07,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:00:07,717 INFO L225 Difference]: With dead ends: 116 [2023-02-16 03:00:07,717 INFO L226 Difference]: Without dead ends: 107 [2023-02-16 03:00:07,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 117 SyntacticMatches, 25 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=312, Invalid=2550, Unknown=0, NotChecked=0, Total=2862 [2023-02-16 03:00:07,719 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 36 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:00:07,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 538 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 03:00:07,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-02-16 03:00:07,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 96. [2023-02-16 03:00:07,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 66 states have internal predecessors, (72), 10 states have call successors, (10), 4 states have call predecessors, (10), 19 states have return successors, (36), 25 states have call predecessors, (36), 10 states have call successors, (36) [2023-02-16 03:00:07,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2023-02-16 03:00:07,740 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 73 [2023-02-16 03:00:07,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:00:07,740 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2023-02-16 03:00:07,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 2.263157894736842) internal successors, (86), 34 states have internal predecessors, (86), 13 states have call successors, (13), 1 states have call predecessors, (13), 16 states have return successors, (24), 15 states have call predecessors, (24), 13 states have call successors, (24) [2023-02-16 03:00:07,741 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2023-02-16 03:00:07,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-02-16 03:00:07,741 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:00:07,741 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:00:07,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-02-16 03:00:07,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2023-02-16 03:00:07,942 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 03:00:07,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:00:07,942 INFO L85 PathProgramCache]: Analyzing trace with hash -810209656, now seen corresponding path program 45 times [2023-02-16 03:00:07,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:00:07,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482994325] [2023-02-16 03:00:07,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:00:07,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:00:07,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:00:08,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 03:00:08,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:00:08,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 03:00:08,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:00:08,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 03:00:08,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:00:08,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 03:00:08,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:00:08,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 03:00:08,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:00:08,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-16 03:00:08,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:00:08,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 03:00:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:00:08,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 03:00:08,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:00:08,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 03:00:08,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:00:08,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 03:00:08,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:00:08,564 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 20 proven. 48 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-16 03:00:08,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:00:08,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482994325] [2023-02-16 03:00:08,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482994325] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:00:08,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614412814] [2023-02-16 03:00:08,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 03:00:08,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:00:08,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:00:08,566 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:00:08,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-02-16 03:00:09,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-16 03:00:09,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:00:09,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-16 03:00:09,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:00:10,065 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 11 proven. 51 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-02-16 03:00:10,066 INFO L328 TraceCheckSpWp]: Computing backward predicates...