./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/gcd_4+newton_3_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/combinations/gcd_4+newton_3_1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ad6236f3b1535aee53ef497474ba76faac9143455d497d8d917066c0b5859668 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 20:35:19,184 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 20:35:19,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 20:35:19,209 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 20:35:19,210 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 20:35:19,211 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 20:35:19,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 20:35:19,213 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 20:35:19,214 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 20:35:19,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 20:35:19,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 20:35:19,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 20:35:19,217 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 20:35:19,218 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 20:35:19,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 20:35:19,219 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 20:35:19,220 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 20:35:19,221 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 20:35:19,222 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 20:35:19,223 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 20:35:19,224 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 20:35:19,225 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 20:35:19,226 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 20:35:19,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 20:35:19,227 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 20:35:19,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 20:35:19,229 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 20:35:19,229 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 20:35:19,230 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 20:35:19,230 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 20:35:19,231 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 20:35:19,231 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 20:35:19,232 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 20:35:19,232 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 20:35:19,233 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 20:35:19,233 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 20:35:19,234 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 20:35:19,234 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 20:35:19,234 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 20:35:19,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 20:35:19,235 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 20:35:19,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 20:35:19,236 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 20:35:19,250 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 20:35:19,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 20:35:19,251 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 20:35:19,251 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 20:35:19,251 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 20:35:19,251 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 20:35:19,252 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 20:35:19,252 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 20:35:19,252 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 20:35:19,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 20:35:19,253 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 20:35:19,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 20:35:19,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 20:35:19,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 20:35:19,253 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 20:35:19,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 20:35:19,253 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 20:35:19,254 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 20:35:19,254 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 20:35:19,254 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 20:35:19,254 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 20:35:19,254 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 20:35:19,254 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 20:35:19,254 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 20:35:19,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 20:35:19,255 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 20:35:19,255 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 20:35:19,255 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 20:35:19,255 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 20:35:19,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 20:35:19,256 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 20:35:19,256 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 20:35:19,256 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 20:35:19,256 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad6236f3b1535aee53ef497474ba76faac9143455d497d8d917066c0b5859668 [2022-07-13 20:35:19,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 20:35:19,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 20:35:19,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 20:35:19,450 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 20:35:19,450 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 20:35:19,451 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_4+newton_3_1.i [2022-07-13 20:35:19,495 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8de90d22/cd3199ec48914cf6b8b1630afb6ced32/FLAGa43396b12 [2022-07-13 20:35:19,871 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 20:35:19,872 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_3_1.i [2022-07-13 20:35:19,879 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8de90d22/cd3199ec48914cf6b8b1630afb6ced32/FLAGa43396b12 [2022-07-13 20:35:19,892 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8de90d22/cd3199ec48914cf6b8b1630afb6ced32 [2022-07-13 20:35:19,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 20:35:19,895 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 20:35:19,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 20:35:19,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 20:35:19,898 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 20:35:19,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 08:35:19" (1/1) ... [2022-07-13 20:35:19,899 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@685eca88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:35:19, skipping insertion in model container [2022-07-13 20:35:19,900 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 08:35:19" (1/1) ... [2022-07-13 20:35:19,905 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 20:35:19,922 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 20:35:20,060 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_3_1.i[1224,1237] [2022-07-13 20:35:20,098 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_3_1.i[2848,2861] [2022-07-13 20:35:20,101 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 20:35:20,107 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 20:35:20,120 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_3_1.i[1224,1237] [2022-07-13 20:35:20,137 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_3_1.i[2848,2861] [2022-07-13 20:35:20,141 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 20:35:20,150 INFO L208 MainTranslator]: Completed translation [2022-07-13 20:35:20,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:35:20 WrapperNode [2022-07-13 20:35:20,151 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 20:35:20,152 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 20:35:20,152 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 20:35:20,153 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 20:35:20,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:35:20" (1/1) ... [2022-07-13 20:35:20,168 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:35:20" (1/1) ... [2022-07-13 20:35:20,188 INFO L137 Inliner]: procedures = 27, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 77 [2022-07-13 20:35:20,189 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 20:35:20,190 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 20:35:20,190 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 20:35:20,190 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 20:35:20,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:35:20" (1/1) ... [2022-07-13 20:35:20,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:35:20" (1/1) ... [2022-07-13 20:35:20,199 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:35:20" (1/1) ... [2022-07-13 20:35:20,200 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:35:20" (1/1) ... [2022-07-13 20:35:20,219 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:35:20" (1/1) ... [2022-07-13 20:35:20,223 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:35:20" (1/1) ... [2022-07-13 20:35:20,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:35:20" (1/1) ... [2022-07-13 20:35:20,225 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 20:35:20,229 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 20:35:20,229 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 20:35:20,229 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 20:35:20,231 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:35:20" (1/1) ... [2022-07-13 20:35:20,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 20:35:20,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:35:20,282 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) [2022-07-13 20:35:20,309 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 [2022-07-13 20:35:20,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 20:35:20,323 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-07-13 20:35:20,323 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-07-13 20:35:20,324 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-07-13 20:35:20,325 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-07-13 20:35:20,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 20:35:20,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 20:35:20,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 20:35:20,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-13 20:35:20,326 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-13 20:35:20,375 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 20:35:20,376 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 20:35:20,534 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 20:35:20,542 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 20:35:20,542 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 20:35:20,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:35:20 BoogieIcfgContainer [2022-07-13 20:35:20,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 20:35:20,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 20:35:20,546 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 20:35:20,548 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 20:35:20,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 08:35:19" (1/3) ... [2022-07-13 20:35:20,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d607f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:35:20, skipping insertion in model container [2022-07-13 20:35:20,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:35:20" (2/3) ... [2022-07-13 20:35:20,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d607f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:35:20, skipping insertion in model container [2022-07-13 20:35:20,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:35:20" (3/3) ... [2022-07-13 20:35:20,550 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_3_1.i [2022-07-13 20:35:20,563 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 20:35:20,564 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-13 20:35:20,605 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 20:35:20,609 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2e5a45d5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@c00516e [2022-07-13 20:35:20,609 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 20:35:20,615 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-13 20:35:20,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 20:35:20,623 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:35:20,623 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:35:20,624 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:35:20,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:35:20,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1780387208, now seen corresponding path program 1 times [2022-07-13 20:35:20,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:35:20,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870133745] [2022-07-13 20:35:20,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:35:20,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:35:20,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:35:20,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:35:20,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:35:20,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870133745] [2022-07-13 20:35:20,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870133745] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:35:20,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:35:20,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 20:35:20,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241488366] [2022-07-13 20:35:20,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:35:20,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 20:35:20,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:35:20,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 20:35:20,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:35:20,828 INFO L87 Difference]: Start difference. First operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-07-13 20:35:20,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:35:20,889 INFO L93 Difference]: Finished difference Result 99 states and 137 transitions. [2022-07-13 20:35:20,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 20:35:20,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 11 [2022-07-13 20:35:20,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:35:20,896 INFO L225 Difference]: With dead ends: 99 [2022-07-13 20:35:20,897 INFO L226 Difference]: Without dead ends: 46 [2022-07-13 20:35:20,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:35:20,905 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 13 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:35:20,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 99 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:35:20,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-13 20:35:20,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2022-07-13 20:35:20,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-13 20:35:20,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2022-07-13 20:35:20,936 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 11 [2022-07-13 20:35:20,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:35:20,936 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2022-07-13 20:35:20,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-07-13 20:35:20,937 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2022-07-13 20:35:20,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-13 20:35:20,938 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:35:20,938 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:35:20,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 20:35:20,939 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:35:20,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:35:20,940 INFO L85 PathProgramCache]: Analyzing trace with hash 413718792, now seen corresponding path program 1 times [2022-07-13 20:35:20,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:35:20,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133945865] [2022-07-13 20:35:20,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:35:20,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:35:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:35:20,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:35:20,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:35:20,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133945865] [2022-07-13 20:35:20,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133945865] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:35:20,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:35:20,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 20:35:20,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174268655] [2022-07-13 20:35:20,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:35:20,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 20:35:20,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:35:20,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 20:35:20,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:35:20,995 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-07-13 20:35:21,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:35:21,011 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2022-07-13 20:35:21,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 20:35:21,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 13 [2022-07-13 20:35:21,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:35:21,012 INFO L225 Difference]: With dead ends: 55 [2022-07-13 20:35:21,013 INFO L226 Difference]: Without dead ends: 41 [2022-07-13 20:35:21,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:35:21,014 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 4 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:35:21,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 80 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:35:21,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-13 20:35:21,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-07-13 20:35:21,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-13 20:35:21,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-07-13 20:35:21,024 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 13 [2022-07-13 20:35:21,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:35:21,025 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-07-13 20:35:21,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-07-13 20:35:21,025 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-07-13 20:35:21,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-13 20:35:21,026 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:35:21,026 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:35:21,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 20:35:21,027 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:35:21,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:35:21,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1714945339, now seen corresponding path program 1 times [2022-07-13 20:35:21,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:35:21,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762506314] [2022-07-13 20:35:21,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:35:21,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:35:21,040 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 20:35:21,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [67202876] [2022-07-13 20:35:21,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:35:21,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:35:21,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:35:21,043 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) [2022-07-13 20:35:21,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 20:35:21,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:35:21,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 20:35:21,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:35:21,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:35:21,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 20:35:21,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:35:21,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:35:21,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762506314] [2022-07-13 20:35:21,196 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 20:35:21,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67202876] [2022-07-13 20:35:21,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67202876] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 20:35:21,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 20:35:21,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-07-13 20:35:21,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625034105] [2022-07-13 20:35:21,197 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 20:35:21,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 20:35:21,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:35:21,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 20:35:21,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 20:35:21,200 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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) [2022-07-13 20:35:21,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:35:21,234 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2022-07-13 20:35:21,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 20:35:21,236 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 15 [2022-07-13 20:35:21,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:35:21,237 INFO L225 Difference]: With dead ends: 58 [2022-07-13 20:35:21,237 INFO L226 Difference]: Without dead ends: 45 [2022-07-13 20:35:21,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 20:35:21,238 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:35:21,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 154 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:35:21,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-13 20:35:21,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-07-13 20:35:21,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 33 states have internal predecessors, (36), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-13 20:35:21,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2022-07-13 20:35:21,265 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 15 [2022-07-13 20:35:21,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:35:21,265 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2022-07-13 20:35:21,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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) [2022-07-13 20:35:21,269 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2022-07-13 20:35:21,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-13 20:35:21,269 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:35:21,270 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:35:21,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 20:35:21,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:35:21,471 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:35:21,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:35:21,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1992824063, now seen corresponding path program 1 times [2022-07-13 20:35:21,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:35:21,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520050250] [2022-07-13 20:35:21,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:35:21,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:35:21,499 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 20:35:21,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752087684] [2022-07-13 20:35:21,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:35:21,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:35:21,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:35:21,503 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) [2022-07-13 20:35:21,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 20:35:21,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:35:21,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 20:35:21,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:35:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:35:21,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 20:35:21,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:35:21,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:35:21,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520050250] [2022-07-13 20:35:21,655 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 20:35:21,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752087684] [2022-07-13 20:35:21,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752087684] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 20:35:21,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 20:35:21,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-13 20:35:21,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771001878] [2022-07-13 20:35:21,658 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 20:35:21,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 20:35:21,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:35:21,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 20:35:21,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-13 20:35:21,660 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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) [2022-07-13 20:35:21,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:35:21,703 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2022-07-13 20:35:21,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 20:35:21,704 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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 19 [2022-07-13 20:35:21,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:35:21,706 INFO L225 Difference]: With dead ends: 60 [2022-07-13 20:35:21,706 INFO L226 Difference]: Without dead ends: 47 [2022-07-13 20:35:21,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-13 20:35:21,709 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:35:21,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 227 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:35:21,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-13 20:35:21,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-07-13 20:35:21,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-13 20:35:21,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-07-13 20:35:21,726 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 19 [2022-07-13 20:35:21,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:35:21,727 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-07-13 20:35:21,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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) [2022-07-13 20:35:21,727 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-07-13 20:35:21,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-13 20:35:21,728 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:35:21,728 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:35:21,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-13 20:35:21,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-13 20:35:21,943 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:35:21,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:35:21,944 INFO L85 PathProgramCache]: Analyzing trace with hash -626272964, now seen corresponding path program 2 times [2022-07-13 20:35:21,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:35:21,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660198044] [2022-07-13 20:35:21,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:35:21,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:35:21,967 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 20:35:21,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1847184409] [2022-07-13 20:35:21,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 20:35:21,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:35:21,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:35:21,969 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) [2022-07-13 20:35:21,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 20:35:22,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 20:35:22,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 20:35:22,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 20:35:22,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:35:22,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:35:22,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 20:35:22,190 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:35:22,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:35:22,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660198044] [2022-07-13 20:35:22,191 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 20:35:22,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847184409] [2022-07-13 20:35:22,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847184409] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 20:35:22,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 20:35:22,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-07-13 20:35:22,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677585802] [2022-07-13 20:35:22,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 20:35:22,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 20:35:22,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:35:22,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 20:35:22,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-07-13 20:35:22,193 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 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) [2022-07-13 20:35:22,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:35:22,269 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2022-07-13 20:35:22,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 20:35:22,270 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 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 21 [2022-07-13 20:35:22,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:35:22,271 INFO L225 Difference]: With dead ends: 68 [2022-07-13 20:35:22,271 INFO L226 Difference]: Without dead ends: 53 [2022-07-13 20:35:22,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-07-13 20:35:22,272 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 20:35:22,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 301 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:35:22,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-13 20:35:22,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-07-13 20:35:22,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-13 20:35:22,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2022-07-13 20:35:22,277 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 21 [2022-07-13 20:35:22,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:35:22,277 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2022-07-13 20:35:22,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 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) [2022-07-13 20:35:22,277 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2022-07-13 20:35:22,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-13 20:35:22,278 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:35:22,278 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:35:22,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 20:35:22,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:35:22,491 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:35:22,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:35:22,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1120707465, now seen corresponding path program 3 times [2022-07-13 20:35:22,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:35:22,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744625741] [2022-07-13 20:35:22,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:35:22,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:35:22,512 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 20:35:22,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2044452894] [2022-07-13 20:35:22,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 20:35:22,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:35:22,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:35:22,514 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) [2022-07-13 20:35:22,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 20:35:22,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-13 20:35:22,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 20:35:22,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-13 20:35:22,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:35:22,664 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 20:35:22,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 20:35:22,913 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 20:35:22,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:35:22,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744625741] [2022-07-13 20:35:22,913 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 20:35:22,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044452894] [2022-07-13 20:35:22,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044452894] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 20:35:22,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 20:35:22,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-07-13 20:35:22,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879624745] [2022-07-13 20:35:22,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 20:35:22,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 20:35:22,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:35:22,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 20:35:22,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-07-13 20:35:22,914 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 18 states, 16 states have (on average 2.0625) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:35:23,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:35:23,267 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2022-07-13 20:35:23,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 20:35:23,268 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (2), 1 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 23 [2022-07-13 20:35:23,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:35:23,269 INFO L225 Difference]: With dead ends: 81 [2022-07-13 20:35:23,269 INFO L226 Difference]: Without dead ends: 78 [2022-07-13 20:35:23,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2022-07-13 20:35:23,270 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 50 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 20:35:23,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 338 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 20:35:23,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-13 20:35:23,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 70. [2022-07-13 20:35:23,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 56 states have internal predecessors, (64), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-13 20:35:23,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2022-07-13 20:35:23,276 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 23 [2022-07-13 20:35:23,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:35:23,276 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2022-07-13 20:35:23,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 20:35:23,276 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2022-07-13 20:35:23,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-13 20:35:23,277 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:35:23,277 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:35:23,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-13 20:35:23,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:35:23,487 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:35:23,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:35:23,488 INFO L85 PathProgramCache]: Analyzing trace with hash 469106930, now seen corresponding path program 4 times [2022-07-13 20:35:23,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:35:23,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104518433] [2022-07-13 20:35:23,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:35:23,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:35:23,495 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 20:35:23,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [60122239] [2022-07-13 20:35:23,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 20:35:23,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:35:23,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:35:23,497 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) [2022-07-13 20:35:23,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 20:35:23,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 20:35:23,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 20:35:23,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-13 20:35:23,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:35:23,623 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:35:23,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 20:35:23,721 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:35:23,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:35:23,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104518433] [2022-07-13 20:35:23,722 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 20:35:23,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60122239] [2022-07-13 20:35:23,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60122239] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 20:35:23,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 20:35:23,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-07-13 20:35:23,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120565073] [2022-07-13 20:35:23,722 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 20:35:23,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 20:35:23,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:35:23,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 20:35:23,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-07-13 20:35:23,724 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 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) [2022-07-13 20:35:23,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:35:23,851 INFO L93 Difference]: Finished difference Result 94 states and 117 transitions. [2022-07-13 20:35:23,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 20:35:23,852 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 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 25 [2022-07-13 20:35:23,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:35:23,853 INFO L225 Difference]: With dead ends: 94 [2022-07-13 20:35:23,854 INFO L226 Difference]: Without dead ends: 66 [2022-07-13 20:35:23,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2022-07-13 20:35:23,854 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 25 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 20:35:23,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 411 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 20:35:23,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-13 20:35:23,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-07-13 20:35:23,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 52 states have internal predecessors, (55), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-13 20:35:23,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2022-07-13 20:35:23,864 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 25 [2022-07-13 20:35:23,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:35:23,865 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2022-07-13 20:35:23,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 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) [2022-07-13 20:35:23,865 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2022-07-13 20:35:23,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-13 20:35:23,869 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:35:23,869 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:35:23,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 20:35:24,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:35:24,082 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:35:24,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:35:24,083 INFO L85 PathProgramCache]: Analyzing trace with hash -985782289, now seen corresponding path program 5 times [2022-07-13 20:35:24,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:35:24,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143822443] [2022-07-13 20:35:24,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:35:24,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:35:24,112 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 20:35:24,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [94928689] [2022-07-13 20:35:24,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 20:35:24,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:35:24,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:35:24,114 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) [2022-07-13 20:35:24,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 20:35:24,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-13 20:35:24,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 20:35:24,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 20:35:24,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:35:24,296 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:35:24,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 20:35:24,539 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:35:24,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:35:24,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143822443] [2022-07-13 20:35:24,540 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 20:35:24,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94928689] [2022-07-13 20:35:24,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94928689] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 20:35:24,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 20:35:24,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-07-13 20:35:24,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688794452] [2022-07-13 20:35:24,541 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 20:35:24,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 20:35:24,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:35:24,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 20:35:24,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-07-13 20:35:24,542 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 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) [2022-07-13 20:35:24,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:35:24,611 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2022-07-13 20:35:24,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 20:35:24,613 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 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 27 [2022-07-13 20:35:24,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:35:24,613 INFO L225 Difference]: With dead ends: 76 [2022-07-13 20:35:24,613 INFO L226 Difference]: Without dead ends: 49 [2022-07-13 20:35:24,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-07-13 20:35:24,614 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 20:35:24,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 354 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 91 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2022-07-13 20:35:24,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-13 20:35:24,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-07-13 20:35:24,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-13 20:35:24,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-07-13 20:35:24,618 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 27 [2022-07-13 20:35:24,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:35:24,618 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-07-13 20:35:24,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 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) [2022-07-13 20:35:24,619 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-07-13 20:35:24,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-13 20:35:24,619 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:35:24,619 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:35:24,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 20:35:24,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:35:24,834 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:35:24,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:35:24,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1781630816, now seen corresponding path program 1 times [2022-07-13 20:35:24,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:35:24,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834585647] [2022-07-13 20:35:24,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:35:24,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:35:24,842 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 20:35:24,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [37950815] [2022-07-13 20:35:24,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:35:24,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:35:24,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:35:24,847 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) [2022-07-13 20:35:24,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 20:35:24,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:35:24,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-13 20:35:24,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:35:24,989 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 20:35:24,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 20:35:25,186 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 20:35:25,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:35:25,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834585647] [2022-07-13 20:35:25,187 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 20:35:25,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37950815] [2022-07-13 20:35:25,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37950815] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 20:35:25,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 20:35:25,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-07-13 20:35:25,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134538484] [2022-07-13 20:35:25,187 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 20:35:25,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 20:35:25,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:35:25,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 20:35:25,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-07-13 20:35:25,188 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 20:35:25,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:35:25,762 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2022-07-13 20:35:25,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 20:35:25,762 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-07-13 20:35:25,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:35:25,763 INFO L225 Difference]: With dead ends: 49 [2022-07-13 20:35:25,763 INFO L226 Difference]: Without dead ends: 23 [2022-07-13 20:35:25,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-07-13 20:35:25,764 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 10 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 20:35:25,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 388 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 20:35:25,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-13 20:35:25,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-07-13 20:35:25,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.0) internal successors, (14), 14 states have internal predecessors, (14), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-13 20:35:25,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-07-13 20:35:25,766 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 28 [2022-07-13 20:35:25,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:35:25,766 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-07-13 20:35:25,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 20:35:25,766 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-07-13 20:35:25,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-13 20:35:25,766 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:35:25,767 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:35:25,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 20:35:25,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:35:25,967 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:35:25,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:35:25,968 INFO L85 PathProgramCache]: Analyzing trace with hash -21288017, now seen corresponding path program 1 times [2022-07-13 20:35:25,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:35:25,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322585428] [2022-07-13 20:35:25,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:35:25,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:35:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 20:35:25,991 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 20:35:25,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 20:35:26,033 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 20:35:26,035 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 20:35:26,036 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-07-13 20:35:26,038 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 20:35:26,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 20:35:26,040 INFO L356 BasicCegarLoop]: Path program histogram: [5, 1, 1, 1, 1, 1] [2022-07-13 20:35:26,042 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-13 20:35:26,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 08:35:26 BoogieIcfgContainer [2022-07-13 20:35:26,058 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-13 20:35:26,059 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-13 20:35:26,059 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-13 20:35:26,062 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-13 20:35:26,062 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:35:20" (3/4) ... [2022-07-13 20:35:26,064 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-13 20:35:26,064 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-13 20:35:26,065 INFO L158 Benchmark]: Toolchain (without parser) took 6170.03ms. Allocated memory was 111.1MB in the beginning and 169.9MB in the end (delta: 58.7MB). Free memory was 82.2MB in the beginning and 138.1MB in the end (delta: -55.9MB). Peak memory consumption was 1.9MB. Max. memory is 16.1GB. [2022-07-13 20:35:26,065 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 111.1MB. Free memory is still 67.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 20:35:26,066 INFO L158 Benchmark]: CACSL2BoogieTranslator took 255.68ms. Allocated memory was 111.1MB in the beginning and 140.5MB in the end (delta: 29.4MB). Free memory was 82.2MB in the beginning and 113.2MB in the end (delta: -31.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-13 20:35:26,066 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.76ms. Allocated memory is still 140.5MB. Free memory was 113.2MB in the beginning and 111.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 20:35:26,066 INFO L158 Benchmark]: Boogie Preprocessor took 38.47ms. Allocated memory is still 140.5MB. Free memory was 111.6MB in the beginning and 110.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 20:35:26,066 INFO L158 Benchmark]: RCFGBuilder took 314.80ms. Allocated memory is still 140.5MB. Free memory was 110.5MB in the beginning and 99.0MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-13 20:35:26,067 INFO L158 Benchmark]: TraceAbstraction took 5513.44ms. Allocated memory was 140.5MB in the beginning and 169.9MB in the end (delta: 29.4MB). Free memory was 98.5MB in the beginning and 139.2MB in the end (delta: -40.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 20:35:26,067 INFO L158 Benchmark]: Witness Printer took 5.71ms. Allocated memory is still 169.9MB. Free memory was 139.2MB in the beginning and 138.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 20:35:26,068 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 111.1MB. Free memory is still 67.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 255.68ms. Allocated memory was 111.1MB in the beginning and 140.5MB in the end (delta: 29.4MB). Free memory was 82.2MB in the beginning and 113.2MB in the end (delta: -31.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.76ms. Allocated memory is still 140.5MB. Free memory was 113.2MB in the beginning and 111.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.47ms. Allocated memory is still 140.5MB. Free memory was 111.6MB in the beginning and 110.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 314.80ms. Allocated memory is still 140.5MB. Free memory was 110.5MB in the beginning and 99.0MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 5513.44ms. Allocated memory was 140.5MB in the beginning and 169.9MB in the end (delta: 29.4MB). Free memory was 98.5MB in the beginning and 139.2MB in the end (delta: -40.7MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 5.71ms. Allocated memory is still 169.9MB. Free memory was 139.2MB in the beginning and 138.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 109]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 98, overapproximation of someBinaryDOUBLEComparisonOperation at line 108, overapproximation of someBinaryArithmeticFLOAToperation at line 104. Possible FailurePath: [L115] COND FALSE !(__VERIFIER_nondet_int()) [L118] CALL main2() [L97] float IN = __VERIFIER_nondet_float(); [L98] CALL assume_abort_if_not(IN > -0.2f && IN < 0.2f) [L82] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L98] RET assume_abort_if_not(IN > -0.2f && IN < 0.2f) [L100] CALL, EXPR f(IN) VAL [\old(x)=56] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=56, x=56] [L100] RET, EXPR f(IN) VAL [f(IN)=50, IN=56] [L100] CALL, EXPR fp(IN) VAL [\old(x)=56] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=56, x=56] [L100] RET, EXPR fp(IN) VAL [f(IN)=50, fp(IN)=49, IN=56] [L100] float x = IN - f(IN)/fp(IN); [L102] CALL, EXPR f(x) VAL [\old(x)=51] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=51, x=51] [L102] RET, EXPR f(x) VAL [f(x)=57, IN=56, x=51] [L102] CALL, EXPR fp(x) VAL [\old(x)=51] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=51, x=51] [L102] RET, EXPR fp(x) VAL [f(x)=57, fp(x)=52, IN=56, x=51] [L102] x = x - f(x)/fp(x) [L104] CALL, EXPR f(x) VAL [\old(x)=54] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=54, x=54] [L104] RET, EXPR f(x) VAL [f(x)=53, IN=56, x=54] [L104] CALL, EXPR fp(x) VAL [\old(x)=54] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=54, x=54] [L104] RET, EXPR fp(x) VAL [f(x)=53, fp(x)=55, IN=56, x=54] [L104] x = x - f(x)/fp(x) [L108] COND TRUE !(x < 0.1) VAL [IN=56] [L109] reach_error() VAL [IN=56] - UnprovableResult [Line: 27]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 46 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 5.4s, OverallIterations: 10, TraceHistogramMax: 7, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 131 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 125 mSDsluCounter, 2352 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 22 IncrementalHoareTripleChecker+Unchecked, 1984 mSDsCounter, 103 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 824 IncrementalHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 103 mSolverCounterUnsat, 368 mSDtfsCounter, 824 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 333 GetRequests, 222 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=6, InterpolantAutomatonStates: 72, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 15 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 216 NumberOfCodeBlocks, 212 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 324 ConstructedInterpolants, 10 QuantifiedInterpolants, 2133 SizeOfPredicates, 44 NumberOfNonLiveVariables, 545 ConjunctsInSsa, 105 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 56/326 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-07-13 20:35:26,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/combinations/gcd_4+newton_3_1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 ad6236f3b1535aee53ef497474ba76faac9143455d497d8d917066c0b5859668 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 20:35:27,719 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 20:35:27,720 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 20:35:27,746 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 20:35:27,746 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 20:35:27,749 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 20:35:27,753 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 20:35:27,756 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 20:35:27,757 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 20:35:27,761 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 20:35:27,781 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 20:35:27,783 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 20:35:27,783 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 20:35:27,784 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 20:35:27,786 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 20:35:27,789 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 20:35:27,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 20:35:27,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 20:35:27,793 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 20:35:27,797 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 20:35:27,798 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 20:35:27,798 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 20:35:27,800 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 20:35:27,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 20:35:27,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 20:35:27,806 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 20:35:27,807 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 20:35:27,807 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 20:35:27,807 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 20:35:27,808 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 20:35:27,808 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 20:35:27,809 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 20:35:27,810 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 20:35:27,810 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 20:35:27,811 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 20:35:27,812 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 20:35:27,812 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 20:35:27,813 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 20:35:27,813 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 20:35:27,813 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 20:35:27,814 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 20:35:27,814 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 20:35:27,820 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-13 20:35:27,845 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 20:35:27,845 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 20:35:27,845 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 20:35:27,845 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 20:35:27,846 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 20:35:27,846 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 20:35:27,847 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 20:35:27,847 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 20:35:27,847 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 20:35:27,848 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 20:35:27,848 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 20:35:27,848 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 20:35:27,848 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 20:35:27,848 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 20:35:27,849 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 20:35:27,849 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 20:35:27,849 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-13 20:35:27,849 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-13 20:35:27,849 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-13 20:35:27,850 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 20:35:27,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 20:35:27,850 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 20:35:27,850 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 20:35:27,850 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 20:35:27,850 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 20:35:27,851 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 20:35:27,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 20:35:27,851 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 20:35:27,851 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 20:35:27,851 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 20:35:27,852 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-13 20:35:27,852 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-13 20:35:27,852 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 20:35:27,852 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 20:35:27,852 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 20:35:27,852 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-13 20:35:27,853 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad6236f3b1535aee53ef497474ba76faac9143455d497d8d917066c0b5859668 [2022-07-13 20:35:28,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 20:35:28,133 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 20:35:28,134 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 20:35:28,135 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 20:35:28,136 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 20:35:28,137 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/gcd_4+newton_3_1.i [2022-07-13 20:35:28,183 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d8b7ef6c/81712d3b4dc7429ebff3a839897cfda8/FLAG2fbfe35f9 [2022-07-13 20:35:28,476 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 20:35:28,477 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_3_1.i [2022-07-13 20:35:28,493 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d8b7ef6c/81712d3b4dc7429ebff3a839897cfda8/FLAG2fbfe35f9 [2022-07-13 20:35:28,918 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d8b7ef6c/81712d3b4dc7429ebff3a839897cfda8 [2022-07-13 20:35:28,920 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 20:35:28,921 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 20:35:28,923 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 20:35:28,923 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 20:35:28,926 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 20:35:28,926 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 08:35:28" (1/1) ... [2022-07-13 20:35:28,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@501fcb51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:35:28, skipping insertion in model container [2022-07-13 20:35:28,927 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 08:35:28" (1/1) ... [2022-07-13 20:35:28,932 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 20:35:28,953 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 20:35:29,059 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_3_1.i[1224,1237] [2022-07-13 20:35:29,073 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_3_1.i[2848,2861] [2022-07-13 20:35:29,074 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 20:35:29,080 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 20:35:29,109 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_3_1.i[1224,1237] [2022-07-13 20:35:29,129 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/gcd_4+newton_3_1.i[2848,2861] [2022-07-13 20:35:29,130 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 20:35:29,139 INFO L208 MainTranslator]: Completed translation [2022-07-13 20:35:29,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:35:29 WrapperNode [2022-07-13 20:35:29,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 20:35:29,141 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 20:35:29,141 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 20:35:29,141 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 20:35:29,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:35:29" (1/1) ... [2022-07-13 20:35:29,158 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:35:29" (1/1) ... [2022-07-13 20:35:29,177 INFO L137 Inliner]: procedures = 28, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 74 [2022-07-13 20:35:29,177 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 20:35:29,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 20:35:29,179 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 20:35:29,179 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 20:35:29,184 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:35:29" (1/1) ... [2022-07-13 20:35:29,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:35:29" (1/1) ... [2022-07-13 20:35:29,193 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:35:29" (1/1) ... [2022-07-13 20:35:29,193 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:35:29" (1/1) ... [2022-07-13 20:35:29,206 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:35:29" (1/1) ... [2022-07-13 20:35:29,215 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:35:29" (1/1) ... [2022-07-13 20:35:29,217 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:35:29" (1/1) ... [2022-07-13 20:35:29,221 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 20:35:29,222 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 20:35:29,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 20:35:29,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 20:35:29,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:35:29" (1/1) ... [2022-07-13 20:35:29,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 20:35:29,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:35:29,244 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) [2022-07-13 20:35:29,272 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 [2022-07-13 20:35:29,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 20:35:29,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-13 20:35:29,283 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-07-13 20:35:29,283 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-07-13 20:35:29,283 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-07-13 20:35:29,284 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-07-13 20:35:29,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 20:35:29,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 20:35:29,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-13 20:35:29,284 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-13 20:35:29,348 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 20:35:29,349 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 20:35:37,699 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 20:35:37,703 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 20:35:37,705 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 20:35:37,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:35:37 BoogieIcfgContainer [2022-07-13 20:35:37,707 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 20:35:37,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 20:35:37,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 20:35:37,721 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 20:35:37,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 08:35:28" (1/3) ... [2022-07-13 20:35:37,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d7498 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:35:37, skipping insertion in model container [2022-07-13 20:35:37,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:35:29" (2/3) ... [2022-07-13 20:35:37,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d7498 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:35:37, skipping insertion in model container [2022-07-13 20:35:37,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:35:37" (3/3) ... [2022-07-13 20:35:37,723 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_3_1.i [2022-07-13 20:35:37,732 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 20:35:37,733 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-13 20:35:37,761 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 20:35:37,766 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@23a4b631, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@a2205a9 [2022-07-13 20:35:37,766 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 20:35:37,770 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-13 20:35:37,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 20:35:37,775 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:35:37,776 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:35:37,776 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:35:37,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:35:37,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1780387208, now seen corresponding path program 1 times [2022-07-13 20:35:37,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 20:35:37,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1585475247] [2022-07-13 20:35:37,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:35:37,790 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 20:35:37,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 20:35:37,805 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 20:35:37,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-13 20:35:37,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:35:37,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 20:35:37,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:35:37,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:35:37,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 20:35:37,982 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 20:35:37,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1585475247] [2022-07-13 20:35:37,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1585475247] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:35:37,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:35:37,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 20:35:37,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691519585] [2022-07-13 20:35:37,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:35:37,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 20:35:37,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 20:35:38,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 20:35:38,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:35:38,009 INFO L87 Difference]: Start difference. First operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-07-13 20:35:38,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:35:38,096 INFO L93 Difference]: Finished difference Result 99 states and 137 transitions. [2022-07-13 20:35:38,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 20:35:38,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 11 [2022-07-13 20:35:38,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:35:38,103 INFO L225 Difference]: With dead ends: 99 [2022-07-13 20:35:38,103 INFO L226 Difference]: Without dead ends: 46 [2022-07-13 20:35:38,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:35:38,109 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 13 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 20:35:38,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 100 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 20:35:38,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-13 20:35:38,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2022-07-13 20:35:38,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-13 20:35:38,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2022-07-13 20:35:38,153 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 11 [2022-07-13 20:35:38,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:35:38,154 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2022-07-13 20:35:38,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-07-13 20:35:38,154 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2022-07-13 20:35:38,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-13 20:35:38,156 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:35:38,156 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:35:38,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-13 20:35:38,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 20:35:38,368 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:35:38,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:35:38,369 INFO L85 PathProgramCache]: Analyzing trace with hash 413718792, now seen corresponding path program 1 times [2022-07-13 20:35:38,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 20:35:38,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [132094339] [2022-07-13 20:35:38,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:35:38,370 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 20:35:38,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 20:35:38,372 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 20:35:38,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-13 20:35:38,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:35:38,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 20:35:38,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:35:38,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:35:38,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 20:35:38,483 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 20:35:38,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [132094339] [2022-07-13 20:35:38,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [132094339] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:35:38,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:35:38,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 20:35:38,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970701883] [2022-07-13 20:35:38,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:35:38,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 20:35:38,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 20:35:38,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 20:35:38,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:35:38,485 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-07-13 20:35:38,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:35:38,568 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2022-07-13 20:35:38,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 20:35:38,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 13 [2022-07-13 20:35:38,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:35:38,572 INFO L225 Difference]: With dead ends: 55 [2022-07-13 20:35:38,572 INFO L226 Difference]: Without dead ends: 41 [2022-07-13 20:35:38,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:35:38,574 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 4 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 20:35:38,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 80 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 20:35:38,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-13 20:35:38,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-07-13 20:35:38,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-13 20:35:38,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-07-13 20:35:38,579 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 13 [2022-07-13 20:35:38,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:35:38,579 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-07-13 20:35:38,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-07-13 20:35:38,579 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-07-13 20:35:38,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-13 20:35:38,580 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:35:38,580 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:35:38,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-13 20:35:38,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 20:35:38,781 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:35:38,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:35:38,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1714945339, now seen corresponding path program 1 times [2022-07-13 20:35:38,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 20:35:38,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311668178] [2022-07-13 20:35:38,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:35:38,782 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 20:35:38,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 20:35:38,786 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 20:35:38,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-13 20:35:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:35:38,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 20:35:38,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:35:39,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:35:39,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 20:35:39,147 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 20:35:39,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311668178] [2022-07-13 20:35:39,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1311668178] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:35:39,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:35:39,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 20:35:39,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145461831] [2022-07-13 20:35:39,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:35:39,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 20:35:39,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 20:35:39,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 20:35:39,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:35:39,149 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-07-13 20:35:39,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:35:39,245 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2022-07-13 20:35:39,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 20:35:39,245 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 15 [2022-07-13 20:35:39,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:35:39,246 INFO L225 Difference]: With dead ends: 56 [2022-07-13 20:35:39,246 INFO L226 Difference]: Without dead ends: 43 [2022-07-13 20:35:39,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:35:39,249 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 20:35:39,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 20:35:39,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-13 20:35:39,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-07-13 20:35:39,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-13 20:35:39,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-07-13 20:35:39,257 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 15 [2022-07-13 20:35:39,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:35:39,257 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-07-13 20:35:39,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-07-13 20:35:39,264 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-07-13 20:35:39,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-13 20:35:39,264 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:35:39,265 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:35:39,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-13 20:35:39,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 20:35:39,478 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:35:39,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:35:39,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1030187394, now seen corresponding path program 1 times [2022-07-13 20:35:39,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 20:35:39,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1598677526] [2022-07-13 20:35:39,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:35:39,479 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 20:35:39,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 20:35:39,480 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 20:35:39,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-13 20:35:39,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:35:39,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 20:35:39,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:35:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:35:39,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 20:35:40,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:35:40,148 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 20:35:40,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1598677526] [2022-07-13 20:35:40,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1598677526] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 20:35:40,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 20:35:40,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-07-13 20:35:40,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711202223] [2022-07-13 20:35:40,148 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 20:35:40,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 20:35:40,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 20:35:40,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 20:35:40,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-13 20:35:40,149 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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) [2022-07-13 20:35:40,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:35:40,352 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2022-07-13 20:35:40,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 20:35:40,353 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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 17 [2022-07-13 20:35:40,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:35:40,354 INFO L225 Difference]: With dead ends: 60 [2022-07-13 20:35:40,354 INFO L226 Difference]: Without dead ends: 47 [2022-07-13 20:35:40,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-13 20:35:40,356 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 20:35:40,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 115 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 20:35:40,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-13 20:35:40,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-07-13 20:35:40,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-13 20:35:40,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-07-13 20:35:40,360 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 17 [2022-07-13 20:35:40,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:35:40,361 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-07-13 20:35:40,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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) [2022-07-13 20:35:40,361 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-07-13 20:35:40,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-13 20:35:40,361 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:35:40,361 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:35:40,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-13 20:35:40,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 20:35:40,571 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:35:40,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:35:40,571 INFO L85 PathProgramCache]: Analyzing trace with hash -626272964, now seen corresponding path program 2 times [2022-07-13 20:35:40,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 20:35:40,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [343361307] [2022-07-13 20:35:40,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 20:35:40,572 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 20:35:40,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 20:35:40,576 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 20:35:40,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-13 20:35:40,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 20:35:40,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 20:35:40,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 20:35:40,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:35:42,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 20:35:42,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 20:35:50,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 20:35:50,161 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 20:35:50,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [343361307] [2022-07-13 20:35:50,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [343361307] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 20:35:50,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 20:35:50,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-07-13 20:35:50,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157089662] [2022-07-13 20:35:50,164 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 20:35:50,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 20:35:50,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 20:35:50,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 20:35:50,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-07-13 20:35:50,167 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 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) [2022-07-13 20:36:11,318 WARN L233 SmtUtils]: Spent 7.88s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-13 20:36:27,564 WARN L233 SmtUtils]: Spent 8.73s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-13 20:36:42,870 WARN L233 SmtUtils]: Spent 9.14s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-13 20:36:47,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:36:47,935 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2022-07-13 20:36:47,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-13 20:36:47,969 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 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 21 [2022-07-13 20:36:47,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:36:47,970 INFO L225 Difference]: With dead ends: 71 [2022-07-13 20:36:47,970 INFO L226 Difference]: Without dead ends: 68 [2022-07-13 20:36:47,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 56.9s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-07-13 20:36:47,971 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 34 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-07-13 20:36:47,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 406 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2022-07-13 20:36:47,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-13 20:36:47,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2022-07-13 20:36:47,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 52 states have internal predecessors, (59), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-13 20:36:47,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2022-07-13 20:36:47,996 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 21 [2022-07-13 20:36:47,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:36:47,996 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2022-07-13 20:36:47,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 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) [2022-07-13 20:36:47,997 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2022-07-13 20:36:47,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-13 20:36:47,997 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:36:47,997 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:36:48,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-13 20:36:48,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 20:36:48,198 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:36:48,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:36:48,199 INFO L85 PathProgramCache]: Analyzing trace with hash -311360839, now seen corresponding path program 3 times [2022-07-13 20:36:48,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 20:36:48,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2037395758] [2022-07-13 20:36:48,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 20:36:48,200 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 20:36:48,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 20:36:48,201 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 20:36:48,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-13 20:36:48,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 20:36:48,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 20:36:48,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 20:36:48,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:36:48,317 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 20:36:48,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 20:36:48,317 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 20:36:48,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2037395758] [2022-07-13 20:36:48,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2037395758] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:36:48,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:36:48,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 20:36:48,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121564646] [2022-07-13 20:36:48,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:36:48,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 20:36:48,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 20:36:48,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 20:36:48,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:36:48,318 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2022-07-13 20:36:48,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:36:48,377 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2022-07-13 20:36:48,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 20:36:48,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 23 [2022-07-13 20:36:48,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:36:48,384 INFO L225 Difference]: With dead ends: 78 [2022-07-13 20:36:48,384 INFO L226 Difference]: Without dead ends: 67 [2022-07-13 20:36:48,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 20:36:48,384 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 3 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 20:36:48,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 80 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 20:36:48,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-13 20:36:48,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-07-13 20:36:48,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 50 states have internal predecessors, (55), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-13 20:36:48,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-07-13 20:36:48,402 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 23 [2022-07-13 20:36:48,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:36:48,404 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-07-13 20:36:48,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2022-07-13 20:36:48,404 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-07-13 20:36:48,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-13 20:36:48,405 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:36:48,405 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:36:48,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-07-13 20:36:48,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 20:36:48,606 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:36:48,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:36:48,606 INFO L85 PathProgramCache]: Analyzing trace with hash 603968502, now seen corresponding path program 4 times [2022-07-13 20:36:48,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 20:36:48,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1561586767] [2022-07-13 20:36:48,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 20:36:48,607 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 20:36:48,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 20:36:48,610 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 20:36:48,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-13 20:36:48,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 20:36:48,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 20:36:48,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 20:36:48,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:36:49,263 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 20:36:49,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 20:36:49,994 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 20:36:49,994 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 20:36:49,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1561586767] [2022-07-13 20:36:49,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1561586767] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 20:36:49,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 20:36:49,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-13 20:36:49,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579993328] [2022-07-13 20:36:49,996 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 20:36:49,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 20:36:49,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 20:36:49,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 20:36:49,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-13 20:36:49,999 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 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) [2022-07-13 20:36:50,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:36:50,917 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2022-07-13 20:36:50,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 20:36:50,929 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 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 25 [2022-07-13 20:36:50,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:36:50,929 INFO L225 Difference]: With dead ends: 88 [2022-07-13 20:36:50,929 INFO L226 Difference]: Without dead ends: 64 [2022-07-13 20:36:50,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-07-13 20:36:50,930 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 12 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 20:36:50,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 263 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 20:36:50,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-13 20:36:50,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2022-07-13 20:36:50,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 46 states have internal predecessors, (50), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-13 20:36:50,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2022-07-13 20:36:50,951 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 25 [2022-07-13 20:36:50,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:36:50,952 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2022-07-13 20:36:50,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 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) [2022-07-13 20:36:50,952 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2022-07-13 20:36:50,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-13 20:36:50,953 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:36:50,953 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:36:50,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-13 20:36:51,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 20:36:51,154 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:36:51,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:36:51,154 INFO L85 PathProgramCache]: Analyzing trace with hash 225362363, now seen corresponding path program 1 times [2022-07-13 20:36:51,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 20:36:51,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830720775] [2022-07-13 20:36:51,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:36:51,155 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 20:36:51,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 20:36:51,156 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 20:36:51,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-13 20:36:51,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:36:51,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 20:36:51,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:36:52,013 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 20:36:52,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 20:36:52,665 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:36:52,665 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 20:36:52,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830720775] [2022-07-13 20:36:52,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830720775] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 20:36:52,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 20:36:52,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-07-13 20:36:52,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989221201] [2022-07-13 20:36:52,671 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 20:36:52,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 20:36:52,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 20:36:52,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 20:36:52,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-07-13 20:36:52,673 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 20:36:53,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:36:53,447 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2022-07-13 20:36:53,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 20:36:53,462 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-07-13 20:36:53,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:36:53,462 INFO L225 Difference]: With dead ends: 74 [2022-07-13 20:36:53,463 INFO L226 Difference]: Without dead ends: 60 [2022-07-13 20:36:53,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-07-13 20:36:53,464 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 15 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 20:36:53,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 264 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 63 Invalid, 0 Unknown, 14 Unchecked, 0.5s Time] [2022-07-13 20:36:53,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-13 20:36:53,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-07-13 20:36:53,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 46 states have internal predecessors, (49), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-13 20:36:53,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2022-07-13 20:36:53,479 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 26 [2022-07-13 20:36:53,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:36:53,479 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2022-07-13 20:36:53,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 20:36:53,480 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2022-07-13 20:36:53,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-13 20:36:53,481 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:36:53,481 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:36:53,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-13 20:36:53,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 20:36:53,693 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:36:53,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:36:53,693 INFO L85 PathProgramCache]: Analyzing trace with hash -334589841, now seen corresponding path program 5 times [2022-07-13 20:36:53,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 20:36:53,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2029141667] [2022-07-13 20:36:53,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 20:36:53,694 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 20:36:53,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 20:36:53,695 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 20:36:53,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-13 20:36:53,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-13 20:36:53,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 20:36:53,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 20:36:53,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:36:54,817 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 20:36:54,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 20:36:57,634 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 20:36:57,635 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 20:36:57,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2029141667] [2022-07-13 20:36:57,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2029141667] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 20:36:57,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 20:36:57,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2022-07-13 20:36:57,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893283352] [2022-07-13 20:36:57,637 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 20:36:57,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 20:36:57,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 20:36:57,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 20:36:57,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-07-13 20:36:57,639 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 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) [2022-07-13 20:36:58,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:36:58,595 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2022-07-13 20:36:58,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 20:36:58,603 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 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 27 [2022-07-13 20:36:58,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:36:58,603 INFO L225 Difference]: With dead ends: 75 [2022-07-13 20:36:58,604 INFO L226 Difference]: Without dead ends: 49 [2022-07-13 20:36:58,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-07-13 20:36:58,605 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 11 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 20:36:58,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 307 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-13 20:36:58,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-13 20:36:58,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-07-13 20:36:58,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-13 20:36:58,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-07-13 20:36:58,613 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 27 [2022-07-13 20:36:58,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:36:58,613 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-07-13 20:36:58,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 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) [2022-07-13 20:36:58,614 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-07-13 20:36:58,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-13 20:36:58,614 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:36:58,614 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:36:58,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-13 20:36:58,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 20:36:58,815 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:36:58,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:36:58,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1781630816, now seen corresponding path program 2 times [2022-07-13 20:36:58,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 20:36:58,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2008164251] [2022-07-13 20:36:58,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 20:36:58,816 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 20:36:58,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 20:36:58,817 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 20:36:58,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-13 20:36:58,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 20:36:58,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 20:36:58,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 20:36:58,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:37:00,407 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 20:37:00,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 20:37:09,192 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 20:37:09,192 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 20:37:09,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2008164251] [2022-07-13 20:37:09,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2008164251] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 20:37:09,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 20:37:09,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-07-13 20:37:09,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135139903] [2022-07-13 20:37:09,193 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 20:37:09,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 20:37:09,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 20:37:09,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 20:37:09,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-07-13 20:37:09,194 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 20:37:22,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:37:22,618 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2022-07-13 20:37:22,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 20:37:22,618 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-07-13 20:37:22,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:37:22,619 INFO L225 Difference]: With dead ends: 49 [2022-07-13 20:37:22,619 INFO L226 Difference]: Without dead ends: 23 [2022-07-13 20:37:22,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-07-13 20:37:22,620 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 14 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-07-13 20:37:22,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 389 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-07-13 20:37:22,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-13 20:37:22,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-07-13 20:37:22,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.0) internal successors, (14), 14 states have internal predecessors, (14), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-13 20:37:22,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-07-13 20:37:22,621 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 28 [2022-07-13 20:37:22,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:37:22,622 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-07-13 20:37:22,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 20:37:22,622 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-07-13 20:37:22,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-13 20:37:22,622 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:37:22,622 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 20:37:22,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-13 20:37:22,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 20:37:22,823 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:37:22,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:37:22,823 INFO L85 PathProgramCache]: Analyzing trace with hash -21288017, now seen corresponding path program 1 times [2022-07-13 20:37:22,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 20:37:22,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1892970976] [2022-07-13 20:37:22,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:37:22,824 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 20:37:22,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 20:37:22,825 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 20:37:22,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process