./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/ms3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/ms3.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 b493eaf5cbb9a8ad0f724257518d8f922b0657033a5eb7aa4f50992fe6ac33a4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 11:09:42,312 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 11:09:42,313 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 11:09:42,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 11:09:42,337 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 11:09:42,337 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 11:09:42,338 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 11:09:42,339 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 11:09:42,340 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 11:09:42,341 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 11:09:42,342 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 11:09:42,342 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 11:09:42,343 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 11:09:42,343 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 11:09:42,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 11:09:42,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 11:09:42,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 11:09:42,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 11:09:42,347 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 11:09:42,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 11:09:42,349 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 11:09:42,350 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 11:09:42,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 11:09:42,351 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 11:09:42,352 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 11:09:42,354 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 11:09:42,354 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 11:09:42,355 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 11:09:42,355 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 11:09:42,356 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 11:09:42,356 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 11:09:42,357 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 11:09:42,357 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 11:09:42,358 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 11:09:42,358 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 11:09:42,359 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 11:09:42,359 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 11:09:42,359 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 11:09:42,359 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 11:09:42,360 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 11:09:42,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 11:09:42,361 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 11:09:42,361 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 11:09:42,374 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 11:09:42,374 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 11:09:42,374 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 11:09:42,374 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 11:09:42,375 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 11:09:42,375 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 11:09:42,375 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 11:09:42,375 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 11:09:42,376 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 11:09:42,376 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 11:09:42,376 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 11:09:42,376 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 11:09:42,376 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 11:09:42,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 11:09:42,376 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 11:09:42,377 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 11:09:42,377 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 11:09:42,377 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 11:09:42,377 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 11:09:42,377 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 11:09:42,377 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 11:09:42,377 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 11:09:42,378 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 11:09:42,378 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 11:09:42,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:09:42,378 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 11:09:42,378 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 11:09:42,378 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 11:09:42,378 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 11:09:42,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 11:09:42,379 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 11:09:42,379 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 11:09:42,379 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 11:09:42,379 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b493eaf5cbb9a8ad0f724257518d8f922b0657033a5eb7aa4f50992fe6ac33a4 [2022-07-13 11:09:42,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 11:09:42,572 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 11:09:42,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 11:09:42,577 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 11:09:42,578 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 11:09:42,579 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ms3.c [2022-07-13 11:09:42,633 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0311025b4/0e54d3709c9740c3aee8b5538d04ad6c/FLAG943e9f807 [2022-07-13 11:09:42,990 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 11:09:42,990 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ms3.c [2022-07-13 11:09:42,995 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0311025b4/0e54d3709c9740c3aee8b5538d04ad6c/FLAG943e9f807 [2022-07-13 11:09:43,003 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0311025b4/0e54d3709c9740c3aee8b5538d04ad6c [2022-07-13 11:09:43,005 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 11:09:43,006 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 11:09:43,007 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 11:09:43,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 11:09:43,009 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 11:09:43,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:09:43" (1/1) ... [2022-07-13 11:09:43,010 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bf47579 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:09:43, skipping insertion in model container [2022-07-13 11:09:43,010 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:09:43" (1/1) ... [2022-07-13 11:09:43,015 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 11:09:43,023 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 11:09:43,152 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-fpi/ms3.c[586,599] [2022-07-13 11:09:43,173 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:09:43,184 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 11:09:43,195 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-fpi/ms3.c[586,599] [2022-07-13 11:09:43,205 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:09:43,215 INFO L208 MainTranslator]: Completed translation [2022-07-13 11:09:43,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:09:43 WrapperNode [2022-07-13 11:09:43,215 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 11:09:43,216 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 11:09:43,216 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 11:09:43,217 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 11:09:43,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:09:43" (1/1) ... [2022-07-13 11:09:43,227 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:09:43" (1/1) ... [2022-07-13 11:09:43,240 INFO L137 Inliner]: procedures = 17, calls = 25, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 70 [2022-07-13 11:09:43,245 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 11:09:43,246 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 11:09:43,246 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 11:09:43,246 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 11:09:43,252 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:09:43" (1/1) ... [2022-07-13 11:09:43,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:09:43" (1/1) ... [2022-07-13 11:09:43,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:09:43" (1/1) ... [2022-07-13 11:09:43,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:09:43" (1/1) ... [2022-07-13 11:09:43,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:09:43" (1/1) ... [2022-07-13 11:09:43,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:09:43" (1/1) ... [2022-07-13 11:09:43,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:09:43" (1/1) ... [2022-07-13 11:09:43,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 11:09:43,264 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 11:09:43,264 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 11:09:43,264 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 11:09:43,265 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:09:43" (1/1) ... [2022-07-13 11:09:43,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:09:43,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:09:43,291 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 11:09:43,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 11:09:43,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 11:09:43,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 11:09:43,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 11:09:43,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 11:09:43,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 11:09:43,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 11:09:43,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 11:09:43,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 11:09:43,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 11:09:43,362 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 11:09:43,363 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 11:09:43,464 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 11:09:43,469 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 11:09:43,469 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 11:09:43,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:09:43 BoogieIcfgContainer [2022-07-13 11:09:43,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 11:09:43,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 11:09:43,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 11:09:43,474 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 11:09:43,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 11:09:43" (1/3) ... [2022-07-13 11:09:43,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14d54b25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:09:43, skipping insertion in model container [2022-07-13 11:09:43,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:09:43" (2/3) ... [2022-07-13 11:09:43,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14d54b25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:09:43, skipping insertion in model container [2022-07-13 11:09:43,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:09:43" (3/3) ... [2022-07-13 11:09:43,477 INFO L111 eAbstractionObserver]: Analyzing ICFG ms3.c [2022-07-13 11:09:43,487 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 11:09:43,487 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 11:09:43,521 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 11:09:43,526 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@31ebf33f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7c3f6c1a [2022-07-13 11:09:43,526 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 11:09:43,530 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:09:43,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 11:09:43,534 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:09:43,535 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:09:43,535 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:09:43,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:09:43,539 INFO L85 PathProgramCache]: Analyzing trace with hash 356661439, now seen corresponding path program 1 times [2022-07-13 11:09:43,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:09:43,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310715397] [2022-07-13 11:09:43,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:09:43,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:09:43,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:09:43,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:09:43,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:09:43,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310715397] [2022-07-13 11:09:43,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310715397] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:09:43,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:09:43,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:09:43,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945473859] [2022-07-13 11:09:43,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:09:43,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 11:09:43,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:09:43,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 11:09:43,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 11:09:43,716 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 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) [2022-07-13 11:09:43,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:09:43,727 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2022-07-13 11:09:43,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 11:09:43,729 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 [2022-07-13 11:09:43,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:09:43,734 INFO L225 Difference]: With dead ends: 34 [2022-07-13 11:09:43,734 INFO L226 Difference]: Without dead ends: 15 [2022-07-13 11:09:43,737 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 [2022-07-13 11:09:43,741 INFO L413 NwaCegarLoop]: 22 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, 22 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 [2022-07-13 11:09:43,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:09:43,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-13 11:09:43,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-07-13 11:09:43,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:09:43,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-07-13 11:09:43,764 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2022-07-13 11:09:43,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:09:43,765 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-07-13 11:09:43,765 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) [2022-07-13 11:09:43,765 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-07-13 11:09:43,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 11:09:43,766 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:09:43,766 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:09:43,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 11:09:43,767 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:09:43,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:09:43,768 INFO L85 PathProgramCache]: Analyzing trace with hash -452685187, now seen corresponding path program 1 times [2022-07-13 11:09:43,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:09:43,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856707957] [2022-07-13 11:09:43,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:09:43,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:09:43,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:09:43,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:09:43,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:09:43,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856707957] [2022-07-13 11:09:43,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856707957] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:09:43,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:09:43,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:09:43,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388088045] [2022-07-13 11:09:43,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:09:43,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:09:43,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:09:43,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:09:43,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:09:43,871 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-07-13 11:09:43,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:09:43,944 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2022-07-13 11:09:43,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:09:43,945 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 [2022-07-13 11:09:43,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:09:43,945 INFO L225 Difference]: With dead ends: 28 [2022-07-13 11:09:43,946 INFO L226 Difference]: Without dead ends: 20 [2022-07-13 11:09:43,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:09:43,947 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:09:43,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 11 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:09:43,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-13 11:09:43,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-07-13 11:09:43,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:09:43,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-07-13 11:09:43,964 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2022-07-13 11:09:43,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:09:43,964 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-07-13 11:09:43,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-07-13 11:09:43,965 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-07-13 11:09:43,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-13 11:09:43,965 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:09:43,966 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:09:43,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 11:09:43,966 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:09:43,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:09:43,967 INFO L85 PathProgramCache]: Analyzing trace with hash 623611495, now seen corresponding path program 1 times [2022-07-13 11:09:43,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:09:43,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359832591] [2022-07-13 11:09:43,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:09:43,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:09:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:09:44,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 11:09:44,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:09:44,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359832591] [2022-07-13 11:09:44,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359832591] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:09:44,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:09:44,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 11:09:44,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785533822] [2022-07-13 11:09:44,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:09:44,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:09:44,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:09:44,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:09:44,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:09:44,085 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:09:44,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:09:44,139 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-07-13 11:09:44,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 11:09:44,140 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2022-07-13 11:09:44,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:09:44,140 INFO L225 Difference]: With dead ends: 25 [2022-07-13 11:09:44,140 INFO L226 Difference]: Without dead ends: 21 [2022-07-13 11:09:44,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:09:44,142 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:09:44,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 25 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:09:44,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-13 11:09:44,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-07-13 11:09:44,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:09:44,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-07-13 11:09:44,145 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 16 [2022-07-13 11:09:44,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:09:44,146 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-07-13 11:09:44,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:09:44,146 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-07-13 11:09:44,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-13 11:09:44,146 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:09:44,147 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:09:44,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 11:09:44,148 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:09:44,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:09:44,150 INFO L85 PathProgramCache]: Analyzing trace with hash -422196611, now seen corresponding path program 1 times [2022-07-13 11:09:44,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:09:44,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595828657] [2022-07-13 11:09:44,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:09:44,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:09:44,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:09:44,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:09:44,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:09:44,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595828657] [2022-07-13 11:09:44,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595828657] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:09:44,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770392190] [2022-07-13 11:09:44,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:09:44,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:09:44,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:09:44,263 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:09:44,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 11:09:44,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:09:44,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 11:09:44,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:09:44,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:09:44,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:09:44,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:09:44,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770392190] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:09:44,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:09:44,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-13 11:09:44,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193615974] [2022-07-13 11:09:44,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:09:44,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 11:09:44,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:09:44,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 11:09:44,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-13 11:09:44,505 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:09:44,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:09:44,593 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-07-13 11:09:44,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 11:09:44,593 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-13 11:09:44,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:09:44,597 INFO L225 Difference]: With dead ends: 39 [2022-07-13 11:09:44,597 INFO L226 Difference]: Without dead ends: 25 [2022-07-13 11:09:44,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-13 11:09:44,600 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:09:44,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 22 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:09:44,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-13 11:09:44,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-07-13 11:09:44,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:09:44,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-07-13 11:09:44,611 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2022-07-13 11:09:44,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:09:44,612 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-07-13 11:09:44,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:09:44,613 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-07-13 11:09:44,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-13 11:09:44,614 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:09:44,614 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:09:44,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 11:09:44,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:09:44,830 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:09:44,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:09:44,831 INFO L85 PathProgramCache]: Analyzing trace with hash 692240447, now seen corresponding path program 2 times [2022-07-13 11:09:44,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:09:44,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365286990] [2022-07-13 11:09:44,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:09:44,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:09:44,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:09:45,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:09:45,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:09:45,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365286990] [2022-07-13 11:09:45,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365286990] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:09:45,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342710319] [2022-07-13 11:09:45,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 11:09:45,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:09:45,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:09:45,154 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:09:45,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 11:09:45,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 11:09:45,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:09:45,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-13 11:09:45,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:09:45,291 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 [2022-07-13 11:09:45,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:09:45,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-13 11:09:45,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:09:45,430 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-07-13 11:09:45,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 39 [2022-07-13 11:09:45,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:09:45,640 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-07-13 11:09:45,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 13 [2022-07-13 11:09:45,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:09:45,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:09:48,821 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 114 treesize of output 106 [2022-07-13 11:09:49,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:09:49,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342710319] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:09:49,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:09:49,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-07-13 11:09:49,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490787086] [2022-07-13 11:09:49,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:09:49,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-13 11:09:49,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:09:49,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-13 11:09:49,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=886, Unknown=2, NotChecked=0, Total=1056 [2022-07-13 11:09:49,035 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 33 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:09:49,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:09:49,473 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-07-13 11:09:49,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-13 11:09:49,474 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 33 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-13 11:09:49,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:09:49,474 INFO L225 Difference]: With dead ends: 40 [2022-07-13 11:09:49,475 INFO L226 Difference]: Without dead ends: 29 [2022-07-13 11:09:49,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=321, Invalid=1569, Unknown=2, NotChecked=0, Total=1892 [2022-07-13 11:09:49,476 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 24 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:09:49,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 74 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 200 Invalid, 0 Unknown, 77 Unchecked, 0.1s Time] [2022-07-13 11:09:49,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-13 11:09:49,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2022-07-13 11:09:49,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:09:49,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-07-13 11:09:49,479 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2022-07-13 11:09:49,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:09:49,479 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-07-13 11:09:49,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 33 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:09:49,479 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-07-13 11:09:49,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-13 11:09:49,479 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:09:49,479 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:09:49,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 11:09:49,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:09:49,680 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:09:49,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:09:49,681 INFO L85 PathProgramCache]: Analyzing trace with hash -301520475, now seen corresponding path program 3 times [2022-07-13 11:09:49,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:09:49,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162470085] [2022-07-13 11:09:49,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:09:49,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:09:49,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:09:49,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:09:49,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:09:49,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162470085] [2022-07-13 11:09:49,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162470085] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:09:49,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224620106] [2022-07-13 11:09:49,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 11:09:49,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:09:49,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:09:49,771 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:09:49,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 11:09:49,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-13 11:09:49,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:09:49,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 11:09:49,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:09:49,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:09:49,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:09:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:09:49,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224620106] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:09:49,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:09:49,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-13 11:09:49,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867014686] [2022-07-13 11:09:49,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:09:49,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 11:09:49,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:09:49,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 11:09:49,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-13 11:09:49,898 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:09:49,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:09:49,971 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2022-07-13 11:09:49,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 11:09:49,972 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-13 11:09:49,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:09:49,972 INFO L225 Difference]: With dead ends: 56 [2022-07-13 11:09:49,972 INFO L226 Difference]: Without dead ends: 39 [2022-07-13 11:09:49,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-07-13 11:09:49,973 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 38 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:09:49,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 35 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:09:49,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-13 11:09:49,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 27. [2022-07-13 11:09:49,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:09:49,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-07-13 11:09:49,977 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2022-07-13 11:09:49,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:09:49,977 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-07-13 11:09:49,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:09:49,978 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-07-13 11:09:49,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-13 11:09:49,978 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:09:49,978 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:09:49,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-13 11:09:50,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:09:50,195 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:09:50,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:09:50,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1384678109, now seen corresponding path program 4 times [2022-07-13 11:09:50,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:09:50,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446101369] [2022-07-13 11:09:50,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:09:50,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:09:50,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:09:50,634 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:09:50,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:09:50,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446101369] [2022-07-13 11:09:50,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446101369] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:09:50,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122783387] [2022-07-13 11:09:50,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 11:09:50,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:09:50,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:09:50,654 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:09:50,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 11:09:50,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 11:09:50,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:09:50,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-13 11:09:50,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:09:50,735 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 15 treesize of output 11 [2022-07-13 11:09:50,789 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-13 11:09:50,790 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 [2022-07-13 11:09:50,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:09:50,869 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-13 11:09:50,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-07-13 11:09:50,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:09:50,958 INFO L356 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-07-13 11:09:50,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 51 [2022-07-13 11:09:51,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:09:51,060 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-13 11:09:51,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2022-07-13 11:09:51,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:09:51,168 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-13 11:09:51,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 15 [2022-07-13 11:09:51,201 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:09:51,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:10:18,630 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-13 11:10:18,631 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 914 treesize of output 890 [2022-07-13 11:10:19,456 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:10:19,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122783387] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:10:19,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:10:19,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 40 [2022-07-13 11:10:19,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405903948] [2022-07-13 11:10:19,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:10:19,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-13 11:10:19,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:10:19,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-13 11:10:19,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1357, Unknown=11, NotChecked=0, Total=1560 [2022-07-13 11:10:19,458 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 40 states, 40 states have (on average 1.675) internal successors, (67), 40 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:10:28,335 WARN L233 SmtUtils]: Spent 5.90s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-13 11:10:28,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:10:28,747 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2022-07-13 11:10:28,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-13 11:10:28,748 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.675) internal successors, (67), 40 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-13 11:10:28,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:10:28,750 INFO L225 Difference]: With dead ends: 72 [2022-07-13 11:10:28,750 INFO L226 Difference]: Without dead ends: 60 [2022-07-13 11:10:28,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 36.6s TimeCoverageRelationStatistics Valid=441, Invalid=2969, Unknown=12, NotChecked=0, Total=3422 [2022-07-13 11:10:28,752 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 33 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:10:28,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 107 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 371 Invalid, 0 Unknown, 259 Unchecked, 0.2s Time] [2022-07-13 11:10:28,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-13 11:10:28,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2022-07-13 11:10:28,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.125) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:10:28,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-07-13 11:10:28,760 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 26 [2022-07-13 11:10:28,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:10:28,760 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-07-13 11:10:28,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.675) internal successors, (67), 40 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:10:28,760 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-07-13 11:10:28,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-13 11:10:28,761 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:10:28,761 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:10:28,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 11:10:28,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:10:28,961 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:10:28,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:10:28,962 INFO L85 PathProgramCache]: Analyzing trace with hash -483356095, now seen corresponding path program 5 times [2022-07-13 11:10:28,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:10:28,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062373293] [2022-07-13 11:10:28,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:10:28,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:10:28,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:10:29,030 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:10:29,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:10:29,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062373293] [2022-07-13 11:10:29,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062373293] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:10:29,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266404315] [2022-07-13 11:10:29,031 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 11:10:29,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:10:29,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:10:29,033 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:10:29,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 11:10:29,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-13 11:10:29,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:10:29,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 11:10:29,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:10:29,169 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:10:29,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:10:29,224 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:10:29,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266404315] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:10:29,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:10:29,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-13 11:10:29,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930433940] [2022-07-13 11:10:29,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:10:29,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-13 11:10:29,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:10:29,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-13 11:10:29,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-07-13 11:10:29,226 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:10:29,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:10:29,340 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2022-07-13 11:10:29,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 11:10:29,342 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-13 11:10:29,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:10:29,343 INFO L225 Difference]: With dead ends: 81 [2022-07-13 11:10:29,343 INFO L226 Difference]: Without dead ends: 60 [2022-07-13 11:10:29,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2022-07-13 11:10:29,343 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 56 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:10:29,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 41 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:10:29,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-13 11:10:29,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 43. [2022-07-13 11:10:29,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:10:29,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-07-13 11:10:29,360 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 29 [2022-07-13 11:10:29,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:10:29,361 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-07-13 11:10:29,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:10:29,361 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-07-13 11:10:29,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-13 11:10:29,362 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:10:29,362 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:10:29,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 11:10:29,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:10:29,571 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:10:29,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:10:29,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1914654111, now seen corresponding path program 6 times [2022-07-13 11:10:29,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:10:29,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301524488] [2022-07-13 11:10:29,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:10:29,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:10:29,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:10:29,653 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:10:29,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:10:29,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301524488] [2022-07-13 11:10:29,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301524488] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:10:29,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385332335] [2022-07-13 11:10:29,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 11:10:29,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:10:29,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:10:29,655 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:10:29,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 11:10:29,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-13 11:10:29,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:10:29,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 11:10:29,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:10:29,790 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 11:10:29,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:10:29,832 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 11:10:29,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385332335] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:10:29,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:10:29,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 19 [2022-07-13 11:10:29,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130234892] [2022-07-13 11:10:29,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:10:29,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 11:10:29,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:10:29,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 11:10:29,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-07-13 11:10:29,833 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:10:30,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:10:30,055 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2022-07-13 11:10:30,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 11:10:30,056 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-13 11:10:30,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:10:30,056 INFO L225 Difference]: With dead ends: 65 [2022-07-13 11:10:30,056 INFO L226 Difference]: Without dead ends: 55 [2022-07-13 11:10:30,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=242, Invalid=814, Unknown=0, NotChecked=0, Total=1056 [2022-07-13 11:10:30,057 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 64 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:10:30,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 39 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:10:30,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-13 11:10:30,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2022-07-13 11:10:30,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:10:30,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-07-13 11:10:30,062 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 30 [2022-07-13 11:10:30,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:10:30,063 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-07-13 11:10:30,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:10:30,063 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-07-13 11:10:30,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-13 11:10:30,064 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:10:30,064 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:10:30,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 11:10:30,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:10:30,267 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:10:30,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:10:30,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1023492733, now seen corresponding path program 7 times [2022-07-13 11:10:30,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:10:30,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752895438] [2022-07-13 11:10:30,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:10:30,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:10:30,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:10:30,816 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:10:30,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:10:30,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752895438] [2022-07-13 11:10:30,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752895438] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:10:30,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632684444] [2022-07-13 11:10:30,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 11:10:30,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:10:30,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:10:30,818 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 11:10:30,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 11:10:30,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:10:30,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-13 11:10:30,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:10:30,873 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 10 treesize of output 8 [2022-07-13 11:10:30,897 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 15 treesize of output 11 [2022-07-13 11:10:30,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:30,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2022-07-13 11:10:31,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:31,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:31,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:31,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 67 [2022-07-13 11:10:31,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:31,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:31,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:31,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 95 [2022-07-13 11:10:31,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:31,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:31,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:31,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 103 [2022-07-13 11:10:32,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:32,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 103 [2022-07-13 11:10:32,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:10:32,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 102 [2022-07-13 11:10:32,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:10:32,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 34 [2022-07-13 11:10:32,916 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:10:32,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:11:53,776 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-07-13 11:11:53,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16588 treesize of output 16372 [2022-07-13 11:12:04,683 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:12:04,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632684444] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:12:04,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:12:04,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 18] total 50 [2022-07-13 11:12:04,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004354481] [2022-07-13 11:12:04,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:12:04,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-13 11:12:04,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:12:04,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-13 11:12:04,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=2162, Unknown=32, NotChecked=0, Total=2450 [2022-07-13 11:12:04,685 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 50 states, 50 states have (on average 1.58) internal successors, (79), 50 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:12:23,362 WARN L233 SmtUtils]: Spent 6.10s on a formula simplification. DAG size of input: 169 DAG size of output: 117 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-13 11:13:39,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:13:39,339 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2022-07-13 11:13:39,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-13 11:13:39,339 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.58) internal successors, (79), 50 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-13 11:13:39,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:13:39,340 INFO L225 Difference]: With dead ends: 80 [2022-07-13 11:13:39,340 INFO L226 Difference]: Without dead ends: 75 [2022-07-13 11:13:39,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 173.8s TimeCoverageRelationStatistics Valid=553, Invalid=4076, Unknown=63, NotChecked=0, Total=4692 [2022-07-13 11:13:39,341 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:13:39,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 120 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 183 Invalid, 0 Unknown, 173 Unchecked, 0.1s Time] [2022-07-13 11:13:39,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-13 11:13:39,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 46. [2022-07-13 11:13:39,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:13:39,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2022-07-13 11:13:39,362 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 31 [2022-07-13 11:13:39,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:13:39,362 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2022-07-13 11:13:39,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.58) internal successors, (79), 50 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:13:39,363 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2022-07-13 11:13:39,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-13 11:13:39,363 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:13:39,364 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:13:39,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-13 11:13:39,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:13:39,574 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:13:39,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:13:39,574 INFO L85 PathProgramCache]: Analyzing trace with hash -880704545, now seen corresponding path program 8 times [2022-07-13 11:13:39,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:13:39,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060217281] [2022-07-13 11:13:39,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:13:39,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:13:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:13:40,478 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:13:40,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:13:40,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060217281] [2022-07-13 11:13:40,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060217281] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:13:40,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177416875] [2022-07-13 11:13:40,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 11:13:40,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:13:40,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:13:40,480 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) [2022-07-13 11:13:40,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 11:13:40,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 11:13:40,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:13:40,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-13 11:13:40,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:13:40,615 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 15 treesize of output 11 [2022-07-13 11:13:40,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:40,683 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 32 treesize of output 31 [2022-07-13 11:13:40,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:40,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:40,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:40,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 50 [2022-07-13 11:13:40,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:40,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:40,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:40,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:40,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:40,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:40,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-07-13 11:13:41,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:41,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:41,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:41,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:41,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:41,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:41,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:41,007 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 56 [2022-07-13 11:13:41,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:13:41,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:41,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:41,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:41,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:41,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:41,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:41,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:41,141 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 66 [2022-07-13 11:13:41,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:41,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:41,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:41,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:41,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:13:41,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:41,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:41,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:41,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 66 [2022-07-13 11:13:41,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:41,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:41,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:41,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:41,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:41,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:41,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:41,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:41,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:41,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:13:41,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 71 [2022-07-13 11:13:41,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:41,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-07-13 11:13:41,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:13:41,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2022-07-13 11:13:41,627 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:13:41,627 INFO L328 TraceCheckSpWp]: Computing backward predicates...