./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/pnr5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-tiling/pnr5.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c6dc18f387244e600c9c46c5a67fb3c0c9875a9a14eb13d3a621343f4a214b0b --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 22:25:33,165 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 22:25:33,167 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 22:25:33,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 22:25:33,213 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 22:25:33,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 22:25:33,217 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 22:25:33,219 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 22:25:33,221 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 22:25:33,226 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 22:25:33,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 22:25:33,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 22:25:33,229 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 22:25:33,231 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 22:25:33,233 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 22:25:33,236 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 22:25:33,237 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 22:25:33,238 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 22:25:33,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 22:25:33,246 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 22:25:33,248 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 22:25:33,249 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 22:25:33,250 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 22:25:33,251 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 22:25:33,252 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 22:25:33,259 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 22:25:33,260 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 22:25:33,261 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 22:25:33,262 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 22:25:33,262 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 22:25:33,264 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 22:25:33,264 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 22:25:33,266 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 22:25:33,267 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 22:25:33,268 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 22:25:33,269 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 22:25:33,269 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 22:25:33,270 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 22:25:33,270 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 22:25:33,271 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 22:25:33,271 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 22:25:33,273 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 22:25:33,274 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 22:25:33,306 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 22:25:33,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 22:25:33,307 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 22:25:33,307 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 22:25:33,308 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 22:25:33,308 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 22:25:33,309 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 22:25:33,309 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 22:25:33,309 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 22:25:33,310 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 22:25:33,311 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 22:25:33,311 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 22:25:33,311 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 22:25:33,311 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 22:25:33,311 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 22:25:33,311 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 22:25:33,312 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 22:25:33,312 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 22:25:33,312 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 22:25:33,312 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 22:25:33,312 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 22:25:33,313 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 22:25:33,313 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 22:25:33,313 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 22:25:33,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:25:33,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 22:25:33,314 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 22:25:33,314 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 22:25:33,314 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 22:25:33,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 22:25:33,315 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 22:25:33,315 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 22:25:33,315 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 22:25:33,315 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6dc18f387244e600c9c46c5a67fb3c0c9875a9a14eb13d3a621343f4a214b0b [2022-07-11 22:25:33,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 22:25:33,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 22:25:33,561 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 22:25:33,563 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 22:25:33,563 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 22:25:33,565 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pnr5.c [2022-07-11 22:25:33,630 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20808fe7b/dc2f56b050714ee4b5df6eab217aff6e/FLAG2d75191cb [2022-07-11 22:25:34,002 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 22:25:34,002 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr5.c [2022-07-11 22:25:34,008 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20808fe7b/dc2f56b050714ee4b5df6eab217aff6e/FLAG2d75191cb [2022-07-11 22:25:34,428 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20808fe7b/dc2f56b050714ee4b5df6eab217aff6e [2022-07-11 22:25:34,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 22:25:34,432 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 22:25:34,439 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 22:25:34,440 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 22:25:34,443 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 22:25:34,444 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:25:34" (1/1) ... [2022-07-11 22:25:34,445 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10a161f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:25:34, skipping insertion in model container [2022-07-11 22:25:34,445 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:25:34" (1/1) ... [2022-07-11 22:25:34,451 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 22:25:34,464 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 22:25:34,596 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/array-tiling/pnr5.c[395,408] [2022-07-11 22:25:34,634 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:25:34,641 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 22:25:34,654 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/array-tiling/pnr5.c[395,408] [2022-07-11 22:25:34,665 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:25:34,677 INFO L208 MainTranslator]: Completed translation [2022-07-11 22:25:34,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:25:34 WrapperNode [2022-07-11 22:25:34,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 22:25:34,679 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 22:25:34,679 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 22:25:34,679 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 22:25:34,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:25:34" (1/1) ... [2022-07-11 22:25:34,711 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:25:34" (1/1) ... [2022-07-11 22:25:34,729 INFO L137 Inliner]: procedures = 17, calls = 33, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 98 [2022-07-11 22:25:34,730 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 22:25:34,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 22:25:34,731 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 22:25:34,731 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 22:25:34,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:25:34" (1/1) ... [2022-07-11 22:25:34,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:25:34" (1/1) ... [2022-07-11 22:25:34,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:25:34" (1/1) ... [2022-07-11 22:25:34,739 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:25:34" (1/1) ... [2022-07-11 22:25:34,744 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:25:34" (1/1) ... [2022-07-11 22:25:34,750 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:25:34" (1/1) ... [2022-07-11 22:25:34,751 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:25:34" (1/1) ... [2022-07-11 22:25:34,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 22:25:34,754 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 22:25:34,754 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 22:25:34,754 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 22:25:34,756 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:25:34" (1/1) ... [2022-07-11 22:25:34,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:25:34,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:25:34,787 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) [2022-07-11 22:25:34,792 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 [2022-07-11 22:25:34,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 22:25:34,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 22:25:34,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 22:25:34,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-11 22:25:34,829 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2022-07-11 22:25:34,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2022-07-11 22:25:34,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 22:25:34,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 22:25:34,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 22:25:34,891 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 22:25:34,892 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 22:25:35,046 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 22:25:35,052 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 22:25:35,052 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-11 22:25:35,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:25:35 BoogieIcfgContainer [2022-07-11 22:25:35,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 22:25:35,062 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 22:25:35,063 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 22:25:35,066 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 22:25:35,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 10:25:34" (1/3) ... [2022-07-11 22:25:35,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e620e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:25:35, skipping insertion in model container [2022-07-11 22:25:35,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:25:34" (2/3) ... [2022-07-11 22:25:35,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e620e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:25:35, skipping insertion in model container [2022-07-11 22:25:35,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:25:35" (3/3) ... [2022-07-11 22:25:35,085 INFO L111 eAbstractionObserver]: Analyzing ICFG pnr5.c [2022-07-11 22:25:35,098 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 22:25:35,106 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 22:25:35,181 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 22:25:35,187 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@1a8d1e93, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4555bd9c [2022-07-11 22:25:35,188 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 22:25:35,194 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 30 states have internal predecessors, (43), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-11 22:25:35,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-11 22:25:35,202 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:25:35,202 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:25:35,203 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:25:35,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:25:35,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1765780314, now seen corresponding path program 1 times [2022-07-11 22:25:35,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:25:35,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416170174] [2022-07-11 22:25:35,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:25:35,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:25:35,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:35,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:25:35,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:25:35,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416170174] [2022-07-11 22:25:35,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416170174] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:25:35,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:25:35,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-11 22:25:35,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771760128] [2022-07-11 22:25:35,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:25:35,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-11 22:25:35,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:25:35,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-11 22:25:35,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 22:25:35,426 INFO L87 Difference]: Start difference. First operand has 37 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 30 states have internal predecessors, (43), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:25:35,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:25:35,445 INFO L93 Difference]: Finished difference Result 69 states and 98 transitions. [2022-07-11 22:25:35,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-11 22:25:35,447 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-11 22:25:35,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:25:35,452 INFO L225 Difference]: With dead ends: 69 [2022-07-11 22:25:35,452 INFO L226 Difference]: Without dead ends: 33 [2022-07-11 22:25:35,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 22:25:35,459 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:25:35,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:25:35,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-11 22:25:35,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-07-11 22:25:35,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-11 22:25:35,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-07-11 22:25:35,492 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 11 [2022-07-11 22:25:35,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:25:35,493 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-07-11 22:25:35,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:25:35,493 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-07-11 22:25:35,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-11 22:25:35,495 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:25:35,495 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:25:35,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 22:25:35,496 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:25:35,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:25:35,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1807338759, now seen corresponding path program 1 times [2022-07-11 22:25:35,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:25:35,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178396434] [2022-07-11 22:25:35,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:25:35,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:25:35,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:35,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:25:35,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:25:35,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178396434] [2022-07-11 22:25:35,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178396434] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:25:35,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:25:35,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 22:25:35,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876278262] [2022-07-11 22:25:35,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:25:35,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 22:25:35,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:25:35,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 22:25:35,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-11 22:25:35,721 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:25:35,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:25:35,915 INFO L93 Difference]: Finished difference Result 57 states and 78 transitions. [2022-07-11 22:25:35,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-11 22:25:35,915 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-11 22:25:35,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:25:35,918 INFO L225 Difference]: With dead ends: 57 [2022-07-11 22:25:35,919 INFO L226 Difference]: Without dead ends: 50 [2022-07-11 22:25:35,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-11 22:25:35,922 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 121 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:25:35,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 40 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:25:35,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-11 22:25:35,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 34. [2022-07-11 22:25:35,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-11 22:25:35,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2022-07-11 22:25:35,948 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 11 [2022-07-11 22:25:35,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:25:35,949 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2022-07-11 22:25:35,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:25:35,949 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2022-07-11 22:25:35,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-11 22:25:35,950 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:25:35,950 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:25:35,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-11 22:25:35,951 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:25:35,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:25:35,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1950771071, now seen corresponding path program 1 times [2022-07-11 22:25:35,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:25:35,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727317826] [2022-07-11 22:25:35,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:25:35,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:25:36,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:36,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:25:36,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:36,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:25:36,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:36,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:25:36,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:36,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-11 22:25:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:36,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 22:25:36,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:36,382 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 22:25:36,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:25:36,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727317826] [2022-07-11 22:25:36,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727317826] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:25:36,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601361391] [2022-07-11 22:25:36,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:25:36,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:25:36,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:25:36,393 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) [2022-07-11 22:25:36,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 22:25:36,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:36,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-11 22:25:36,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:25:36,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:25:36,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:25:36,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-11 22:25:36,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:25:36,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-11 22:25:36,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:25:36,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-11 22:25:36,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:25:36,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-07-11 22:25:36,875 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 22:25:36,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:25:37,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-11 22:25:37,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-07-11 22:25:37,079 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 22:25:37,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601361391] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:25:37,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:25:37,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 12 [2022-07-11 22:25:37,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467747410] [2022-07-11 22:25:37,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:25:37,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-11 22:25:37,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:25:37,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-11 22:25:37,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-07-11 22:25:37,083 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-11 22:25:37,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:25:37,497 INFO L93 Difference]: Finished difference Result 120 states and 171 transitions. [2022-07-11 22:25:37,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-11 22:25:37,497 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 43 [2022-07-11 22:25:37,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:25:37,503 INFO L225 Difference]: With dead ends: 120 [2022-07-11 22:25:37,503 INFO L226 Difference]: Without dead ends: 118 [2022-07-11 22:25:37,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 89 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-07-11 22:25:37,509 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 123 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 22:25:37,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 293 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-11 22:25:37,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-11 22:25:37,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 54. [2022-07-11 22:25:37,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-11 22:25:37,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 75 transitions. [2022-07-11 22:25:37,524 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 75 transitions. Word has length 43 [2022-07-11 22:25:37,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:25:37,525 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 75 transitions. [2022-07-11 22:25:37,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-11 22:25:37,525 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 75 transitions. [2022-07-11 22:25:37,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-11 22:25:37,526 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:25:37,527 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:25:37,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-11 22:25:37,740 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 [2022-07-11 22:25:37,741 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:25:37,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:25:37,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1642596351, now seen corresponding path program 1 times [2022-07-11 22:25:37,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:25:37,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532455288] [2022-07-11 22:25:37,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:25:37,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:25:37,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:37,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:25:37,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:38,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:25:38,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:38,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:25:38,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:38,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-11 22:25:38,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:38,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 22:25:38,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:38,037 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 22:25:38,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:25:38,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532455288] [2022-07-11 22:25:38,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532455288] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:25:38,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796017774] [2022-07-11 22:25:38,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:25:38,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:25:38,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:25:38,040 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) [2022-07-11 22:25:38,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 22:25:38,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:38,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-11 22:25:38,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:25:38,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:25:38,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:25:38,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:25:38,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:25:38,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:25:38,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:25:38,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:25:38,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:25:38,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-11 22:25:38,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-11 22:25:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-11 22:25:38,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:25:38,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-11 22:25:38,751 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2022-07-11 22:25:38,809 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 22:25:38,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796017774] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:25:38,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:25:38,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2022-07-11 22:25:38,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562033148] [2022-07-11 22:25:38,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:25:38,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-11 22:25:38,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:25:38,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-11 22:25:38,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-07-11 22:25:38,820 INFO L87 Difference]: Start difference. First operand 54 states and 75 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-07-11 22:25:39,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:25:39,656 INFO L93 Difference]: Finished difference Result 179 states and 251 transitions. [2022-07-11 22:25:39,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-11 22:25:39,657 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 43 [2022-07-11 22:25:39,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:25:39,661 INFO L225 Difference]: With dead ends: 179 [2022-07-11 22:25:39,663 INFO L226 Difference]: Without dead ends: 177 [2022-07-11 22:25:39,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 77 SyntacticMatches, 12 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2022-07-11 22:25:39,666 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 145 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 22:25:39,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 516 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 643 Invalid, 0 Unknown, 94 Unchecked, 0.5s Time] [2022-07-11 22:25:39,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-07-11 22:25:39,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 87. [2022-07-11 22:25:39,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.359375) internal successors, (87), 65 states have internal predecessors, (87), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-11 22:25:39,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 127 transitions. [2022-07-11 22:25:39,705 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 127 transitions. Word has length 43 [2022-07-11 22:25:39,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:25:39,705 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 127 transitions. [2022-07-11 22:25:39,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-07-11 22:25:39,706 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 127 transitions. [2022-07-11 22:25:39,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-11 22:25:39,711 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:25:39,712 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:25:39,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-11 22:25:39,927 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 [2022-07-11 22:25:39,928 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:25:39,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:25:39,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1666037387, now seen corresponding path program 1 times [2022-07-11 22:25:39,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:25:39,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124987424] [2022-07-11 22:25:39,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:25:39,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:25:39,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:40,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:25:40,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:40,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:25:40,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:40,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:25:40,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:40,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-11 22:25:40,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:40,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 22:25:40,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:40,117 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 22:25:40,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:25:40,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124987424] [2022-07-11 22:25:40,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124987424] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:25:40,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850718319] [2022-07-11 22:25:40,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:25:40,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:25:40,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:25:40,120 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) [2022-07-11 22:25:40,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 22:25:40,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:40,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-11 22:25:40,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:25:40,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:25:40,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:25:40,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-11 22:25:40,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:25:40,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-11 22:25:40,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:25:40,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-11 22:25:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 22:25:40,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:25:40,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:25:40,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-11 22:25:40,490 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 22:25:40,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850718319] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:25:40,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:25:40,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 13 [2022-07-11 22:25:40,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113148231] [2022-07-11 22:25:40,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:25:40,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-11 22:25:40,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:25:40,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-11 22:25:40,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-11 22:25:40,493 INFO L87 Difference]: Start difference. First operand 87 states and 127 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-11 22:25:40,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:25:40,947 INFO L93 Difference]: Finished difference Result 322 states and 492 transitions. [2022-07-11 22:25:40,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-11 22:25:40,947 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 47 [2022-07-11 22:25:40,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:25:40,950 INFO L225 Difference]: With dead ends: 322 [2022-07-11 22:25:40,950 INFO L226 Difference]: Without dead ends: 320 [2022-07-11 22:25:40,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 95 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-07-11 22:25:40,951 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 147 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 22:25:40,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 345 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-11 22:25:40,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-07-11 22:25:40,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 153. [2022-07-11 22:25:40,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 112 states have (on average 1.3928571428571428) internal successors, (156), 114 states have internal predecessors, (156), 38 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2022-07-11 22:25:40,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 232 transitions. [2022-07-11 22:25:40,980 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 232 transitions. Word has length 47 [2022-07-11 22:25:40,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:25:40,981 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 232 transitions. [2022-07-11 22:25:40,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-11 22:25:40,981 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 232 transitions. [2022-07-11 22:25:40,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-11 22:25:40,983 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:25:40,983 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:25:41,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-11 22:25:41,199 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 [2022-07-11 22:25:41,200 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:25:41,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:25:41,200 INFO L85 PathProgramCache]: Analyzing trace with hash -279833993, now seen corresponding path program 1 times [2022-07-11 22:25:41,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:25:41,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47775173] [2022-07-11 22:25:41,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:25:41,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:25:41,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:41,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:25:41,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:41,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:25:41,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:41,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:25:41,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:41,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-11 22:25:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:41,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 22:25:41,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:41,397 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 22:25:41,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:25:41,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47775173] [2022-07-11 22:25:41,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47775173] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:25:41,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363763590] [2022-07-11 22:25:41,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:25:41,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:25:41,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:25:41,399 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) [2022-07-11 22:25:41,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-11 22:25:41,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:41,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-11 22:25:41,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:25:41,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:25:41,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:25:41,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:25:41,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:25:41,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:25:41,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:25:41,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-11 22:25:41,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-11 22:25:41,833 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 22:25:41,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:25:41,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:25:41,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-11 22:25:42,042 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 22:25:42,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363763590] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:25:42,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:25:42,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2022-07-11 22:25:42,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357707295] [2022-07-11 22:25:42,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:25:42,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-11 22:25:42,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:25:42,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-11 22:25:42,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-07-11 22:25:42,045 INFO L87 Difference]: Start difference. First operand 153 states and 232 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 21 states have internal predecessors, (78), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-07-11 22:25:43,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:25:43,054 INFO L93 Difference]: Finished difference Result 462 states and 691 transitions. [2022-07-11 22:25:43,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-11 22:25:43,055 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 21 states have internal predecessors, (78), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 47 [2022-07-11 22:25:43,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:25:43,058 INFO L225 Difference]: With dead ends: 462 [2022-07-11 22:25:43,058 INFO L226 Difference]: Without dead ends: 460 [2022-07-11 22:25:43,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 85 SyntacticMatches, 10 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2022-07-11 22:25:43,061 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 199 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-11 22:25:43,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 638 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 868 Invalid, 0 Unknown, 103 Unchecked, 0.6s Time] [2022-07-11 22:25:43,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-07-11 22:25:43,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 220. [2022-07-11 22:25:43,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 158 states have (on average 1.4113924050632911) internal successors, (223), 161 states have internal predecessors, (223), 57 states have call successors, (57), 4 states have call predecessors, (57), 4 states have return successors, (57), 54 states have call predecessors, (57), 57 states have call successors, (57) [2022-07-11 22:25:43,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 337 transitions. [2022-07-11 22:25:43,122 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 337 transitions. Word has length 47 [2022-07-11 22:25:43,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:25:43,124 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 337 transitions. [2022-07-11 22:25:43,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 21 states have internal predecessors, (78), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-07-11 22:25:43,124 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 337 transitions. [2022-07-11 22:25:43,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-11 22:25:43,129 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:25:43,129 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:25:43,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-11 22:25:43,342 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 [2022-07-11 22:25:43,343 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:25:43,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:25:43,343 INFO L85 PathProgramCache]: Analyzing trace with hash 131088491, now seen corresponding path program 2 times [2022-07-11 22:25:43,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:25:43,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535142056] [2022-07-11 22:25:43,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:25:43,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:25:43,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:43,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:25:43,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:43,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:25:43,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:43,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:25:43,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:43,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-11 22:25:43,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:43,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 22:25:43,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:43,476 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 22:25:43,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:25:43,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535142056] [2022-07-11 22:25:43,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535142056] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:25:43,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384797247] [2022-07-11 22:25:43,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:25:43,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:25:43,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:25:43,478 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) [2022-07-11 22:25:43,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-11 22:25:43,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:25:43,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:25:43,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-11 22:25:43,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:25:43,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:25:43,608 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:25:43,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-11 22:25:43,629 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 22:25:43,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-07-11 22:25:43,684 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 22:25:43,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:25:43,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:25:43,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-11 22:25:43,784 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 22:25:43,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384797247] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:25:43,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:25:43,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-07-11 22:25:43,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148832940] [2022-07-11 22:25:43,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:25:43,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-11 22:25:43,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:25:43,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-11 22:25:43,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-11 22:25:43,788 INFO L87 Difference]: Start difference. First operand 220 states and 337 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-11 22:25:44,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:25:44,565 INFO L93 Difference]: Finished difference Result 1182 states and 1872 transitions. [2022-07-11 22:25:44,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-11 22:25:44,565 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 51 [2022-07-11 22:25:44,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:25:44,572 INFO L225 Difference]: With dead ends: 1182 [2022-07-11 22:25:44,572 INFO L226 Difference]: Without dead ends: 1180 [2022-07-11 22:25:44,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 101 SyntacticMatches, 10 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2022-07-11 22:25:44,575 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 99 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 22:25:44,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 584 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 22:25:44,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2022-07-11 22:25:44,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 481. [2022-07-11 22:25:44,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 346 states have (on average 1.4421965317919074) internal successors, (499), 349 states have internal predecessors, (499), 130 states have call successors, (130), 4 states have call predecessors, (130), 4 states have return successors, (130), 127 states have call predecessors, (130), 130 states have call successors, (130) [2022-07-11 22:25:44,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 759 transitions. [2022-07-11 22:25:44,641 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 759 transitions. Word has length 51 [2022-07-11 22:25:44,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:25:44,641 INFO L495 AbstractCegarLoop]: Abstraction has 481 states and 759 transitions. [2022-07-11 22:25:44,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-11 22:25:44,642 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 759 transitions. [2022-07-11 22:25:44,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-11 22:25:44,643 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:25:44,643 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:25:44,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-11 22:25:44,851 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 [2022-07-11 22:25:44,851 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:25:44,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:25:44,852 INFO L85 PathProgramCache]: Analyzing trace with hash 2054316525, now seen corresponding path program 1 times [2022-07-11 22:25:44,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:25:44,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680222039] [2022-07-11 22:25:44,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:25:44,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:25:44,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:44,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:25:44,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:44,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:25:44,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:44,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:25:44,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:44,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-11 22:25:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:44,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 22:25:44,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:45,000 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 22:25:45,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:25:45,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680222039] [2022-07-11 22:25:45,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680222039] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:25:45,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640717108] [2022-07-11 22:25:45,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:25:45,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:25:45,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:25:45,003 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) [2022-07-11 22:25:45,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-11 22:25:45,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:45,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-11 22:25:45,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:25:45,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:25:45,212 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:25:45,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:25:45,265 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 22:25:45,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-11 22:25:45,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-11 22:25:45,403 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 22:25:45,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:25:47,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:25:47,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-11 22:25:47,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640717108] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:25:47,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:25:47,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-07-11 22:25:47,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374855531] [2022-07-11 22:25:47,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:25:47,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-11 22:25:47,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:25:47,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-11 22:25:47,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=430, Unknown=1, NotChecked=0, Total=506 [2022-07-11 22:25:47,616 INFO L87 Difference]: Start difference. First operand 481 states and 759 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-11 22:25:48,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:25:48,788 INFO L93 Difference]: Finished difference Result 1217 states and 1879 transitions. [2022-07-11 22:25:48,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-11 22:25:48,788 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 51 [2022-07-11 22:25:48,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:25:48,795 INFO L225 Difference]: With dead ends: 1217 [2022-07-11 22:25:48,795 INFO L226 Difference]: Without dead ends: 1215 [2022-07-11 22:25:48,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 73 SyntacticMatches, 7 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=370, Invalid=2079, Unknown=1, NotChecked=0, Total=2450 [2022-07-11 22:25:48,798 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 237 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-11 22:25:48,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 607 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 750 Invalid, 0 Unknown, 86 Unchecked, 0.6s Time] [2022-07-11 22:25:48,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2022-07-11 22:25:48,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 646. [2022-07-11 22:25:48,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 462 states have (on average 1.448051948051948) internal successors, (669), 465 states have internal predecessors, (669), 175 states have call successors, (175), 8 states have call predecessors, (175), 8 states have return successors, (175), 172 states have call predecessors, (175), 175 states have call successors, (175) [2022-07-11 22:25:48,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1019 transitions. [2022-07-11 22:25:48,888 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1019 transitions. Word has length 51 [2022-07-11 22:25:48,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:25:48,888 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 1019 transitions. [2022-07-11 22:25:48,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-11 22:25:48,889 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1019 transitions. [2022-07-11 22:25:48,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-11 22:25:48,890 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:25:48,891 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:25:48,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-11 22:25:49,102 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 [2022-07-11 22:25:49,102 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:25:49,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:25:49,103 INFO L85 PathProgramCache]: Analyzing trace with hash 881708129, now seen corresponding path program 3 times [2022-07-11 22:25:49,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:25:49,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605606037] [2022-07-11 22:25:49,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:25:49,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:25:49,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:49,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:25:49,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:49,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:25:49,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:49,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:25:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:49,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-11 22:25:49,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:49,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 22:25:49,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:49,249 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 22:25:49,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:25:49,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605606037] [2022-07-11 22:25:49,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605606037] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:25:49,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144009534] [2022-07-11 22:25:49,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 22:25:49,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:25:49,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:25:49,251 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) [2022-07-11 22:25:49,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-11 22:25:49,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-11 22:25:49,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:25:49,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-11 22:25:49,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:25:49,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:25:51,461 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 22:25:51,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-07-11 22:25:51,625 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-11 22:25:51,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:26:00,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-11 22:26:00,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-07-11 22:26:00,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144009534] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:26:00,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:26:00,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2022-07-11 22:26:00,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358296113] [2022-07-11 22:26:00,272 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:26:00,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-11 22:26:00,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:26:00,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-11 22:26:00,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=500, Unknown=5, NotChecked=0, Total=600 [2022-07-11 22:26:00,274 INFO L87 Difference]: Start difference. First operand 646 states and 1019 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-11 22:26:03,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:26:03,216 INFO L93 Difference]: Finished difference Result 1980 states and 3113 transitions. [2022-07-11 22:26:03,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-11 22:26:03,217 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 55 [2022-07-11 22:26:03,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:26:03,228 INFO L225 Difference]: With dead ends: 1980 [2022-07-11 22:26:03,228 INFO L226 Difference]: Without dead ends: 1978 [2022-07-11 22:26:03,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 81 SyntacticMatches, 15 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=339, Invalid=1461, Unknown=6, NotChecked=0, Total=1806 [2022-07-11 22:26:03,231 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 277 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 22:26:03,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 590 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 535 Invalid, 0 Unknown, 98 Unchecked, 0.4s Time] [2022-07-11 22:26:03,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2022-07-11 22:26:03,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1372. [2022-07-11 22:26:03,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 980 states have (on average 1.4551020408163264) internal successors, (1426), 983 states have internal predecessors, (1426), 375 states have call successors, (375), 16 states have call predecessors, (375), 16 states have return successors, (375), 372 states have call predecessors, (375), 375 states have call successors, (375) [2022-07-11 22:26:03,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 2176 transitions. [2022-07-11 22:26:03,405 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 2176 transitions. Word has length 55 [2022-07-11 22:26:03,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:26:03,406 INFO L495 AbstractCegarLoop]: Abstraction has 1372 states and 2176 transitions. [2022-07-11 22:26:03,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-11 22:26:03,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 2176 transitions. [2022-07-11 22:26:03,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-11 22:26:03,408 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:26:03,409 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:26:03,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-11 22:26:03,618 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 [2022-07-11 22:26:03,619 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:26:03,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:26:03,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1022256739, now seen corresponding path program 1 times [2022-07-11 22:26:03,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:26:03,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631540853] [2022-07-11 22:26:03,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:03,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:26:03,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:03,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:26:03,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:03,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:26:03,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:03,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:26:03,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:03,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-11 22:26:03,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:03,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 22:26:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:03,817 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 22:26:03,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:26:03,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631540853] [2022-07-11 22:26:03,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631540853] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:26:03,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280139001] [2022-07-11 22:26:03,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:03,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:26:03,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:26:03,820 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:26:03,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-11 22:26:03,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:03,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-11 22:26:03,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:26:03,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:26:04,040 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 22:26:04,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-11 22:26:04,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-11 22:26:04,193 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-11 22:26:04,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:26:04,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:26:04,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-11 22:26:04,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280139001] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:26:04,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:26:04,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2022-07-11 22:26:04,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401307613] [2022-07-11 22:26:04,373 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:26:04,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-11 22:26:04,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:26:04,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-11 22:26:04,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-07-11 22:26:04,374 INFO L87 Difference]: Start difference. First operand 1372 states and 2176 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-11 22:26:06,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:26:06,008 INFO L93 Difference]: Finished difference Result 3737 states and 5871 transitions. [2022-07-11 22:26:06,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-11 22:26:06,009 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 55 [2022-07-11 22:26:06,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:26:06,025 INFO L225 Difference]: With dead ends: 3737 [2022-07-11 22:26:06,025 INFO L226 Difference]: Without dead ends: 3735 [2022-07-11 22:26:06,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=385, Invalid=2695, Unknown=0, NotChecked=0, Total=3080 [2022-07-11 22:26:06,030 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 223 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 22:26:06,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 835 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 1136 Invalid, 0 Unknown, 141 Unchecked, 0.7s Time] [2022-07-11 22:26:06,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3735 states. [2022-07-11 22:26:06,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3735 to 1856. [2022-07-11 22:26:06,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1320 states have (on average 1.4606060606060607) internal successors, (1928), 1324 states have internal predecessors, (1928), 511 states have call successors, (511), 24 states have call predecessors, (511), 24 states have return successors, (511), 507 states have call predecessors, (511), 511 states have call successors, (511) [2022-07-11 22:26:06,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 2950 transitions. [2022-07-11 22:26:06,323 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 2950 transitions. Word has length 55 [2022-07-11 22:26:06,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:26:06,323 INFO L495 AbstractCegarLoop]: Abstraction has 1856 states and 2950 transitions. [2022-07-11 22:26:06,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-11 22:26:06,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 2950 transitions. [2022-07-11 22:26:06,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-11 22:26:06,327 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:26:06,327 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:26:06,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-11 22:26:06,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-11 22:26:06,551 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:26:06,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:26:06,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1863871831, now seen corresponding path program 4 times [2022-07-11 22:26:06,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:26:06,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296525873] [2022-07-11 22:26:06,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:06,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:26:06,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:06,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:26:06,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:06,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:26:06,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:06,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:26:06,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:06,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-11 22:26:06,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:06,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 22:26:06,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:06,661 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 22:26:06,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:26:06,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296525873] [2022-07-11 22:26:06,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296525873] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:26:06,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436281006] [2022-07-11 22:26:06,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 22:26:06,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:26:06,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:26:06,671 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:26:06,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-11 22:26:06,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 22:26:06,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:26:06,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-11 22:26:06,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:26:06,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-11 22:26:06,873 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 22:26:06,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:26:06,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:26:06,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-11 22:26:06,956 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 22:26:06,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436281006] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:26:06,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:26:06,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 16 [2022-07-11 22:26:06,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544144216] [2022-07-11 22:26:06,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:26:06,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-11 22:26:06,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:26:06,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-11 22:26:06,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-07-11 22:26:06,958 INFO L87 Difference]: Start difference. First operand 1856 states and 2950 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-11 22:26:11,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:26:11,158 INFO L93 Difference]: Finished difference Result 15973 states and 25766 transitions. [2022-07-11 22:26:11,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-07-11 22:26:11,159 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 59 [2022-07-11 22:26:11,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:26:11,229 INFO L225 Difference]: With dead ends: 15973 [2022-07-11 22:26:11,229 INFO L226 Difference]: Without dead ends: 15971 [2022-07-11 22:26:11,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 119 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2480 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=777, Invalid=6195, Unknown=0, NotChecked=0, Total=6972 [2022-07-11 22:26:11,245 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 293 mSDsluCounter, 1328 mSDsCounter, 0 mSdLazyCounter, 2931 mSolverCounterSat, 800 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 1656 SdHoareTripleChecker+Invalid, 3731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 800 IncrementalHoareTripleChecker+Valid, 2931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:26:11,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 1656 Invalid, 3731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [800 Valid, 2931 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-11 22:26:11,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15971 states. [2022-07-11 22:26:12,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15971 to 5959. [2022-07-11 22:26:12,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5959 states, 4222 states have (on average 1.4819990525817148) internal successors, (6257), 4222 states have internal predecessors, (6257), 1712 states have call successors, (1712), 24 states have call predecessors, (1712), 24 states have return successors, (1712), 1712 states have call predecessors, (1712), 1712 states have call successors, (1712) [2022-07-11 22:26:12,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5959 states to 5959 states and 9681 transitions. [2022-07-11 22:26:12,400 INFO L78 Accepts]: Start accepts. Automaton has 5959 states and 9681 transitions. Word has length 59 [2022-07-11 22:26:12,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:26:12,401 INFO L495 AbstractCegarLoop]: Abstraction has 5959 states and 9681 transitions. [2022-07-11 22:26:12,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-11 22:26:12,401 INFO L276 IsEmpty]: Start isEmpty. Operand 5959 states and 9681 transitions. [2022-07-11 22:26:12,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-11 22:26:12,406 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:26:12,406 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:26:12,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-11 22:26:12,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:26:12,623 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:26:12,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:26:12,624 INFO L85 PathProgramCache]: Analyzing trace with hash 58433497, now seen corresponding path program 1 times [2022-07-11 22:26:12,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:26:12,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038058320] [2022-07-11 22:26:12,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:12,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:26:12,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:12,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:26:12,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:12,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:26:12,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:12,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:26:12,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:12,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-11 22:26:12,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:12,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 22:26:12,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:12,754 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 22:26:12,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:26:12,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038058320] [2022-07-11 22:26:12,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038058320] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:26:12,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697106772] [2022-07-11 22:26:12,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:12,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:26:12,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:26:12,760 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:26:12,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-11 22:26:12,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:12,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-11 22:26:12,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:26:12,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-11 22:26:13,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-11 22:26:13,097 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 22:26:13,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:26:13,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:26:13,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-11 22:26:13,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697106772] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:26:13,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:26:13,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2022-07-11 22:26:13,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936467145] [2022-07-11 22:26:13,262 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:26:13,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-11 22:26:13,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:26:13,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-11 22:26:13,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-07-11 22:26:13,263 INFO L87 Difference]: Start difference. First operand 5959 states and 9681 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-11 22:26:16,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:26:16,750 INFO L93 Difference]: Finished difference Result 11693 states and 18784 transitions. [2022-07-11 22:26:16,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-11 22:26:16,751 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 59 [2022-07-11 22:26:16,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:26:16,788 INFO L225 Difference]: With dead ends: 11693 [2022-07-11 22:26:16,789 INFO L226 Difference]: Without dead ends: 11691 [2022-07-11 22:26:16,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2004 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1049, Invalid=5757, Unknown=0, NotChecked=0, Total=6806 [2022-07-11 22:26:16,801 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 348 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 634 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 2187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 634 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:26:16,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 922 Invalid, 2187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [634 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-11 22:26:16,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11691 states. [2022-07-11 22:26:17,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11691 to 1904. [2022-07-11 22:26:17,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1904 states, 1368 states have (on average 1.4502923976608186) internal successors, (1984), 1372 states have internal predecessors, (1984), 511 states have call successors, (511), 24 states have call predecessors, (511), 24 states have return successors, (511), 507 states have call predecessors, (511), 511 states have call successors, (511) [2022-07-11 22:26:17,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1904 states to 1904 states and 3006 transitions. [2022-07-11 22:26:17,349 INFO L78 Accepts]: Start accepts. Automaton has 1904 states and 3006 transitions. Word has length 59 [2022-07-11 22:26:17,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:26:17,349 INFO L495 AbstractCegarLoop]: Abstraction has 1904 states and 3006 transitions. [2022-07-11 22:26:17,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-11 22:26:17,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1904 states and 3006 transitions. [2022-07-11 22:26:17,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-11 22:26:17,352 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:26:17,353 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:26:17,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-11 22:26:17,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-11 22:26:17,577 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:26:17,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:26:17,577 INFO L85 PathProgramCache]: Analyzing trace with hash 819831629, now seen corresponding path program 5 times [2022-07-11 22:26:17,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:26:17,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647777949] [2022-07-11 22:26:17,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:17,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:26:17,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:17,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:26:17,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:17,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:26:17,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:17,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:26:17,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:17,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-11 22:26:17,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:17,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 22:26:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:17,852 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 33 proven. 18 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 22:26:17,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:26:17,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647777949] [2022-07-11 22:26:17,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647777949] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:26:17,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987168044] [2022-07-11 22:26:17,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 22:26:17,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:26:17,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:26:17,856 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:26:17,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-11 22:26:18,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-11 22:26:18,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:26:18,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-11 22:26:18,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:26:18,432 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 22:26:18,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:26:18,671 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 22:26:18,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987168044] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:26:18,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:26:18,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 34 [2022-07-11 22:26:18,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930706124] [2022-07-11 22:26:18,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:26:18,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-11 22:26:18,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:26:18,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-11 22:26:18,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2022-07-11 22:26:18,674 INFO L87 Difference]: Start difference. First operand 1904 states and 3006 transitions. Second operand has 34 states, 34 states have (on average 3.676470588235294) internal successors, (125), 34 states have internal predecessors, (125), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-07-11 22:26:19,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:26:19,401 INFO L93 Difference]: Finished difference Result 2207 states and 3461 transitions. [2022-07-11 22:26:19,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-11 22:26:19,401 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.676470588235294) internal successors, (125), 34 states have internal predecessors, (125), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 63 [2022-07-11 22:26:19,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:26:19,407 INFO L225 Difference]: With dead ends: 2207 [2022-07-11 22:26:19,408 INFO L226 Difference]: Without dead ends: 2179 [2022-07-11 22:26:19,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2022-07-11 22:26:19,410 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 293 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 22:26:19,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 204 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-11 22:26:19,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2179 states. [2022-07-11 22:26:19,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2179 to 1920. [2022-07-11 22:26:19,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1920 states, 1384 states have (on average 1.439306358381503) internal successors, (1992), 1384 states have internal predecessors, (1992), 511 states have call successors, (511), 24 states have call predecessors, (511), 24 states have return successors, (511), 511 states have call predecessors, (511), 511 states have call successors, (511) [2022-07-11 22:26:19,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1920 states to 1920 states and 3014 transitions. [2022-07-11 22:26:19,785 INFO L78 Accepts]: Start accepts. Automaton has 1920 states and 3014 transitions. Word has length 63 [2022-07-11 22:26:19,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:26:19,785 INFO L495 AbstractCegarLoop]: Abstraction has 1920 states and 3014 transitions. [2022-07-11 22:26:19,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.676470588235294) internal successors, (125), 34 states have internal predecessors, (125), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-07-11 22:26:19,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1920 states and 3014 transitions. [2022-07-11 22:26:19,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-11 22:26:19,789 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:26:19,789 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:26:19,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-11 22:26:19,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-11 22:26:19,993 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:26:19,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:26:19,994 INFO L85 PathProgramCache]: Analyzing trace with hash 374578441, now seen corresponding path program 2 times [2022-07-11 22:26:19,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:26:19,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933560879] [2022-07-11 22:26:19,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:19,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:26:20,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:20,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:26:20,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:20,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:26:20,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:20,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:26:20,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:20,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-11 22:26:20,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:20,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 22:26:20,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:20,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 22:26:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:20,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-11 22:26:20,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:20,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-11 22:26:20,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:20,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-11 22:26:20,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:20,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 22:26:20,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-11 22:26:20,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:26:20,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933560879] [2022-07-11 22:26:20,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933560879] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:26:20,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554197357] [2022-07-11 22:26:20,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:26:20,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:26:20,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:26:20,250 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:26:20,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-11 22:26:20,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:26:20,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:26:20,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-11 22:26:20,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:26:20,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:26:20,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:26:20,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:26:20,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:26:20,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:26:20,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-11 22:26:20,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,784 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-11 22:26:20,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-11 22:26:20,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-11 22:26:20,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:20,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-11 22:26:21,001 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-11 22:26:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-11 22:26:21,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:26:21,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554197357] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:26:21,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:26:21,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2022-07-11 22:26:21,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534663711] [2022-07-11 22:26:21,192 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:26:21,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-11 22:26:21,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:26:21,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-11 22:26:21,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-07-11 22:26:21,194 INFO L87 Difference]: Start difference. First operand 1920 states and 3014 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-07-11 22:26:22,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:26:22,649 INFO L93 Difference]: Finished difference Result 3981 states and 6220 transitions. [2022-07-11 22:26:22,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-11 22:26:22,649 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 75 [2022-07-11 22:26:22,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:26:22,660 INFO L225 Difference]: With dead ends: 3981 [2022-07-11 22:26:22,661 INFO L226 Difference]: Without dead ends: 3979 [2022-07-11 22:26:22,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 107 SyntacticMatches, 22 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=279, Invalid=1443, Unknown=0, NotChecked=0, Total=1722 [2022-07-11 22:26:22,666 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 162 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 22:26:22,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 574 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 696 Invalid, 0 Unknown, 94 Unchecked, 0.4s Time] [2022-07-11 22:26:22,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3979 states. [2022-07-11 22:26:23,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3979 to 2319. [2022-07-11 22:26:23,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2319 states, 1668 states have (on average 1.4490407673860912) internal successors, (2417), 1668 states have internal predecessors, (2417), 625 states have call successors, (625), 25 states have call predecessors, (625), 25 states have return successors, (625), 625 states have call predecessors, (625), 625 states have call successors, (625) [2022-07-11 22:26:23,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2319 states to 2319 states and 3667 transitions. [2022-07-11 22:26:23,273 INFO L78 Accepts]: Start accepts. Automaton has 2319 states and 3667 transitions. Word has length 75 [2022-07-11 22:26:23,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:26:23,273 INFO L495 AbstractCegarLoop]: Abstraction has 2319 states and 3667 transitions. [2022-07-11 22:26:23,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-07-11 22:26:23,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2319 states and 3667 transitions. [2022-07-11 22:26:23,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-11 22:26:23,277 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:26:23,277 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:26:23,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-11 22:26:23,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-11 22:26:23,491 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:26:23,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:26:23,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1525924609, now seen corresponding path program 2 times [2022-07-11 22:26:23,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:26:23,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624410015] [2022-07-11 22:26:23,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:23,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:26:23,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:23,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:26:23,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:23,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:26:23,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:23,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:26:23,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:23,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-11 22:26:23,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:23,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 22:26:23,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:23,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 22:26:23,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:23,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-11 22:26:23,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:23,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-11 22:26:23,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:23,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-11 22:26:23,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:23,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 22:26:23,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-11 22:26:23,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:26:23,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624410015] [2022-07-11 22:26:23,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624410015] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:26:23,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950393306] [2022-07-11 22:26:23,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:26:23,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:26:23,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:26:23,725 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:26:23,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-11 22:26:23,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:26:23,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:26:23,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-11 22:26:23,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:26:23,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:26:23,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:23,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:26:23,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:23,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:26:24,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:24,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:26:24,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:24,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-07-11 22:26:24,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:24,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-07-11 22:26:24,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:24,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-07-11 22:26:24,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:24,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-07-11 22:26:24,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:24,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-07-11 22:26:24,377 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-11 22:26:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-07-11 22:26:24,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:26:24,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950393306] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:26:24,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:26:24,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-07-11 22:26:24,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003451846] [2022-07-11 22:26:24,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:26:24,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-11 22:26:24,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:26:24,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-11 22:26:24,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-07-11 22:26:24,574 INFO L87 Difference]: Start difference. First operand 2319 states and 3667 transitions. Second operand has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-07-11 22:26:25,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:26:25,952 INFO L93 Difference]: Finished difference Result 3367 states and 5272 transitions. [2022-07-11 22:26:25,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-11 22:26:25,953 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 79 [2022-07-11 22:26:25,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:26:25,964 INFO L225 Difference]: With dead ends: 3367 [2022-07-11 22:26:25,964 INFO L226 Difference]: Without dead ends: 3365 [2022-07-11 22:26:25,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 113 SyntacticMatches, 20 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=340, Invalid=1822, Unknown=0, NotChecked=0, Total=2162 [2022-07-11 22:26:25,973 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 215 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 22:26:25,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 502 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 637 Invalid, 0 Unknown, 112 Unchecked, 0.4s Time] [2022-07-11 22:26:25,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3365 states. [2022-07-11 22:26:26,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3365 to 2333. [2022-07-11 22:26:26,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2333 states, 1672 states have (on average 1.4479665071770336) internal successors, (2421), 1680 states have internal predecessors, (2421), 633 states have call successors, (633), 27 states have call predecessors, (633), 27 states have return successors, (633), 625 states have call predecessors, (633), 633 states have call successors, (633) [2022-07-11 22:26:26,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2333 states to 2333 states and 3687 transitions. [2022-07-11 22:26:26,632 INFO L78 Accepts]: Start accepts. Automaton has 2333 states and 3687 transitions. Word has length 79 [2022-07-11 22:26:26,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:26:26,632 INFO L495 AbstractCegarLoop]: Abstraction has 2333 states and 3687 transitions. [2022-07-11 22:26:26,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-07-11 22:26:26,633 INFO L276 IsEmpty]: Start isEmpty. Operand 2333 states and 3687 transitions. [2022-07-11 22:26:26,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-11 22:26:26,638 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:26:26,638 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:26:26,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-11 22:26:26,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-11 22:26:26,851 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:26:26,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:26:26,852 INFO L85 PathProgramCache]: Analyzing trace with hash -375078701, now seen corresponding path program 6 times [2022-07-11 22:26:26,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:26:26,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867501565] [2022-07-11 22:26:26,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:26,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:26:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:27,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:26:27,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:27,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:26:27,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:27,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:26:27,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:27,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-11 22:26:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:27,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 22:26:27,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:27,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 22:26:27,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:27,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-11 22:26:27,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:27,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-11 22:26:27,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:27,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-11 22:26:27,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:27,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 22:26:27,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:27,019 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-11 22:26:27,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:26:27,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867501565] [2022-07-11 22:26:27,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867501565] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:26:27,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211187066] [2022-07-11 22:26:27,019 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 22:26:27,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:26:27,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:26:27,024 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:26:27,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-11 22:26:27,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-11 22:26:27,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:26:27,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-11 22:26:27,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:26:27,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:26:35,354 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:26:35,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-11 22:26:43,446 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:26:43,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-11 22:26:51,538 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:26:51,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-11 22:26:59,622 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 22:26:59,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-07-11 22:26:59,858 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 72 proven. 69 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-11 22:26:59,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:27:01,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-11 22:27:01,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-07-11 22:27:02,021 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-11 22:27:02,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211187066] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:27:02,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:27:02,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12] total 26 [2022-07-11 22:27:02,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996140786] [2022-07-11 22:27:02,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:27:02,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-11 22:27:02,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:27:02,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-11 22:27:02,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=547, Unknown=5, NotChecked=0, Total=650 [2022-07-11 22:27:02,024 INFO L87 Difference]: Start difference. First operand 2333 states and 3687 transitions. Second operand has 26 states, 26 states have (on average 4.884615384615385) internal successors, (127), 26 states have internal predecessors, (127), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2022-07-11 22:29:08,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:29:08,146 INFO L93 Difference]: Finished difference Result 25313 states and 41091 transitions. [2022-07-11 22:29:08,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-07-11 22:29:08,147 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.884615384615385) internal successors, (127), 26 states have internal predecessors, (127), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) Word has length 95 [2022-07-11 22:29:08,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:29:08,228 INFO L225 Difference]: With dead ends: 25313 [2022-07-11 22:29:08,228 INFO L226 Difference]: Without dead ends: 25311 [2022-07-11 22:29:08,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 199 SyntacticMatches, 24 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5741 ImplicationChecksByTransitivity, 152.1s TimeCoverageRelationStatistics Valid=1363, Invalid=11456, Unknown=63, NotChecked=0, Total=12882 [2022-07-11 22:29:08,244 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 481 mSDsluCounter, 1999 mSDsCounter, 0 mSdLazyCounter, 5406 mSolverCounterSat, 1228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 2424 SdHoareTripleChecker+Invalid, 7436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1228 IncrementalHoareTripleChecker+Valid, 5406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 802 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:29:08,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 2424 Invalid, 7436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1228 Valid, 5406 Invalid, 0 Unknown, 802 Unchecked, 3.1s Time] [2022-07-11 22:29:08,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25311 states. [2022-07-11 22:29:09,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25311 to 4563. [2022-07-11 22:29:09,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4563 states, 3268 states have (on average 1.464810281517748) internal successors, (4787), 3276 states have internal predecessors, (4787), 1263 states have call successors, (1263), 31 states have call predecessors, (1263), 31 states have return successors, (1263), 1255 states have call predecessors, (1263), 1263 states have call successors, (1263) [2022-07-11 22:29:09,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 7313 transitions. [2022-07-11 22:29:09,827 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 7313 transitions. Word has length 95 [2022-07-11 22:29:09,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:29:09,827 INFO L495 AbstractCegarLoop]: Abstraction has 4563 states and 7313 transitions. [2022-07-11 22:29:09,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.884615384615385) internal successors, (127), 26 states have internal predecessors, (127), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2022-07-11 22:29:09,828 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 7313 transitions. [2022-07-11 22:29:09,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-11 22:29:09,837 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:29:09,837 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:29:09,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-11 22:29:10,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:29:10,051 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:29:10,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:29:10,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1891302485, now seen corresponding path program 1 times [2022-07-11 22:29:10,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:29:10,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201873566] [2022-07-11 22:29:10,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:29:10,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:29:10,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:10,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:29:10,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:10,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:29:10,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:10,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:29:10,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:10,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-11 22:29:10,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:10,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 22:29:10,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:10,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 22:29:10,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:10,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-11 22:29:10,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:10,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-11 22:29:10,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:10,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-11 22:29:10,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:10,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 22:29:10,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:10,249 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-11 22:29:10,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:29:10,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201873566] [2022-07-11 22:29:10,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201873566] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:29:10,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950321902] [2022-07-11 22:29:10,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:29:10,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:29:10,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:29:10,252 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:29:10,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-11 22:29:10,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:10,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-11 22:29:10,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:29:10,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:29:10,580 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:29:10,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:29:10,646 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:29:10,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:29:10,710 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:29:10,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:29:10,774 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 22:29:10,775 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-11 22:29:11,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-11 22:29:11,033 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 72 proven. 69 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-11 22:29:11,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:29:13,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:29:13,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-11 22:29:13,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950321902] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:29:13,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:29:13,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-07-11 22:29:13,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404425777] [2022-07-11 22:29:13,372 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:29:13,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-11 22:29:13,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:29:13,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-11 22:29:13,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=995, Unknown=1, NotChecked=0, Total=1122 [2022-07-11 22:29:13,374 INFO L87 Difference]: Start difference. First operand 4563 states and 7313 transitions. Second operand has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 26 states have internal predecessors, (111), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-07-11 22:29:22,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:29:22,516 INFO L93 Difference]: Finished difference Result 21987 states and 35672 transitions. [2022-07-11 22:29:22,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-11 22:29:22,516 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 26 states have internal predecessors, (111), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 95 [2022-07-11 22:29:22,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:29:22,567 INFO L225 Difference]: With dead ends: 21987 [2022-07-11 22:29:22,567 INFO L226 Difference]: Without dead ends: 21985 [2022-07-11 22:29:22,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 148 SyntacticMatches, 14 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1708 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=530, Invalid=4298, Unknown=2, NotChecked=0, Total=4830 [2022-07-11 22:29:22,579 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 347 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 1765 mSolverCounterSat, 517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 2432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 517 IncrementalHoareTripleChecker+Valid, 1765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:29:22,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 955 Invalid, 2432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [517 Valid, 1765 Invalid, 0 Unknown, 150 Unchecked, 1.0s Time] [2022-07-11 22:29:22,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21985 states. [2022-07-11 22:29:24,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21985 to 4687. [2022-07-11 22:29:24,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4687 states, 3372 states have (on average 1.4647093712930013) internal successors, (4939), 3372 states have internal predecessors, (4939), 1279 states have call successors, (1279), 35 states have call predecessors, (1279), 35 states have return successors, (1279), 1279 states have call predecessors, (1279), 1279 states have call successors, (1279) [2022-07-11 22:29:24,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4687 states to 4687 states and 7497 transitions. [2022-07-11 22:29:24,157 INFO L78 Accepts]: Start accepts. Automaton has 4687 states and 7497 transitions. Word has length 95 [2022-07-11 22:29:24,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:29:24,157 INFO L495 AbstractCegarLoop]: Abstraction has 4687 states and 7497 transitions. [2022-07-11 22:29:24,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 26 states have internal predecessors, (111), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-07-11 22:29:24,158 INFO L276 IsEmpty]: Start isEmpty. Operand 4687 states and 7497 transitions. [2022-07-11 22:29:24,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-11 22:29:24,173 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:29:24,174 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:29:24,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-11 22:29:24,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-11 22:29:24,387 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:29:24,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:29:24,388 INFO L85 PathProgramCache]: Analyzing trace with hash 500947145, now seen corresponding path program 7 times [2022-07-11 22:29:24,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:29:24,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382918346] [2022-07-11 22:29:24,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:29:24,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:29:24,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:24,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:29:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:24,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:29:24,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:24,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:29:24,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:24,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-11 22:29:24,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:24,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 22:29:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:24,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 22:29:24,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:24,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-11 22:29:24,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:24,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-11 22:29:24,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:24,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-11 22:29:24,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:24,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 22:29:24,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:24,586 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-11 22:29:24,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:29:24,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382918346] [2022-07-11 22:29:24,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382918346] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:29:24,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056758821] [2022-07-11 22:29:24,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 22:29:24,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:29:24,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:29:24,592 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:29:24,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-11 22:29:24,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:24,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-11 22:29:24,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:29:24,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:29:24,772 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:29:24,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-11 22:29:24,797 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:29:24,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-11 22:29:24,818 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:29:24,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-11 22:29:25,024 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-11 22:29:25,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-11 22:29:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-11 22:29:25,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:29:25,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:29:25,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-11 22:29:25,202 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-11 22:29:25,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056758821] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:29:25,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:29:25,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2022-07-11 22:29:25,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282870436] [2022-07-11 22:29:25,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:29:25,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-11 22:29:25,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:29:25,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-11 22:29:25,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-07-11 22:29:25,204 INFO L87 Difference]: Start difference. First operand 4687 states and 7497 transitions. Second operand has 21 states, 21 states have (on average 4.714285714285714) internal successors, (99), 21 states have internal predecessors, (99), 4 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13)