./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/sum_10x0-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/sum_10x0-2.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 62383dd39c4465d1f3b7424ac172d9121521b446 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 16:33:19,210 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 16:33:19,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 16:33:19,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 16:33:19,231 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 16:33:19,232 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 16:33:19,233 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 16:33:19,234 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 16:33:19,235 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 16:33:19,236 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 16:33:19,236 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 16:33:19,237 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 16:33:19,237 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 16:33:19,238 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 16:33:19,239 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 16:33:19,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 16:33:19,240 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 16:33:19,241 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 16:33:19,242 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 16:33:19,243 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 16:33:19,244 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 16:33:19,245 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 16:33:19,245 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 16:33:19,246 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 16:33:19,248 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 16:33:19,248 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 16:33:19,248 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 16:33:19,249 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 16:33:19,249 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 16:33:19,250 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 16:33:19,250 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 16:33:19,250 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 16:33:19,251 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 16:33:19,251 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 16:33:19,252 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 16:33:19,252 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 16:33:19,253 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 16:33:19,253 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 16:33:19,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 16:33:19,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 16:33:19,254 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 16:33:19,255 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 16:33:19,271 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 16:33:19,272 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 16:33:19,272 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 16:33:19,272 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 16:33:19,273 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 16:33:19,273 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 16:33:19,273 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 16:33:19,273 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 16:33:19,273 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 16:33:19,274 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 16:33:19,274 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 16:33:19,274 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 16:33:19,274 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 16:33:19,274 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 16:33:19,274 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 16:33:19,274 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 16:33:19,274 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 16:33:19,275 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 16:33:19,275 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 16:33:19,275 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 16:33:19,275 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 16:33:19,275 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 16:33:19,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 16:33:19,284 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 16:33:19,284 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 16:33:19,285 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 16:33:19,285 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 16:33:19,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 16:33:19,285 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 16:33:19,285 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 16:33:19,285 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62383dd39c4465d1f3b7424ac172d9121521b446 [2021-08-29 16:33:19,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 16:33:19,531 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 16:33:19,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 16:33:19,533 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 16:33:19,533 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 16:33:19,534 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/sum_10x0-2.c [2021-08-29 16:33:19,582 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30267c5d5/49908ada223846428c0e86452066a6d6/FLAGd8e367479 [2021-08-29 16:33:19,920 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 16:33:19,920 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_10x0-2.c [2021-08-29 16:33:19,924 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30267c5d5/49908ada223846428c0e86452066a6d6/FLAGd8e367479 [2021-08-29 16:33:20,369 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30267c5d5/49908ada223846428c0e86452066a6d6 [2021-08-29 16:33:20,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 16:33:20,372 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 16:33:20,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 16:33:20,373 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 16:33:20,375 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 16:33:20,376 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 04:33:20" (1/1) ... [2021-08-29 16:33:20,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7580202 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:20, skipping insertion in model container [2021-08-29 16:33:20,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 04:33:20" (1/1) ... [2021-08-29 16:33:20,381 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 16:33:20,388 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 16:33:20,479 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_10x0-2.c[481,494] [2021-08-29 16:33:20,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 16:33:20,487 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 16:33:20,495 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_10x0-2.c[481,494] [2021-08-29 16:33:20,496 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 16:33:20,504 INFO L208 MainTranslator]: Completed translation [2021-08-29 16:33:20,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:20 WrapperNode [2021-08-29 16:33:20,504 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 16:33:20,505 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 16:33:20,505 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 16:33:20,505 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 16:33:20,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:20" (1/1) ... [2021-08-29 16:33:20,521 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:20" (1/1) ... [2021-08-29 16:33:20,547 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 16:33:20,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 16:33:20,548 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 16:33:20,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 16:33:20,553 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:20" (1/1) ... [2021-08-29 16:33:20,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:20" (1/1) ... [2021-08-29 16:33:20,554 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:20" (1/1) ... [2021-08-29 16:33:20,554 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:20" (1/1) ... [2021-08-29 16:33:20,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:20" (1/1) ... [2021-08-29 16:33:20,557 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:20" (1/1) ... [2021-08-29 16:33:20,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:20" (1/1) ... [2021-08-29 16:33:20,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 16:33:20,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 16:33:20,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 16:33:20,559 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 16:33:20,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:20" (1/1) ... [2021-08-29 16:33:20,564 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 16:33:20,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:33:20,582 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) [2021-08-29 16:33:20,603 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 [2021-08-29 16:33:20,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 16:33:20,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 16:33:20,614 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2021-08-29 16:33:20,614 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2021-08-29 16:33:20,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 16:33:20,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 16:33:20,738 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 16:33:20,739 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-29 16:33:20,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 04:33:20 BoogieIcfgContainer [2021-08-29 16:33:20,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 16:33:20,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 16:33:20,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 16:33:20,744 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 16:33:20,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 04:33:20" (1/3) ... [2021-08-29 16:33:20,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@671b14d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 04:33:20, skipping insertion in model container [2021-08-29 16:33:20,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:20" (2/3) ... [2021-08-29 16:33:20,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@671b14d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 04:33:20, skipping insertion in model container [2021-08-29 16:33:20,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 04:33:20" (3/3) ... [2021-08-29 16:33:20,747 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_10x0-2.c [2021-08-29 16:33:20,751 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 16:33:20,751 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 16:33:20,789 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 16:33:20,795 INFO L339 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, mConcurrency=FINITE_AUTOMATA, 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, mLoopAccelerationTechnique=FAST_UPR [2021-08-29 16:33:20,796 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 16:33:20,807 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-29 16:33:20,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-29 16:33:20,811 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:33:20,811 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:33:20,812 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:33:20,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:33:20,819 INFO L82 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2021-08-29 16:33:20,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:33:20,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663607127] [2021-08-29 16:33:20,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:33:20,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:33:20,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:21,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:21,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:21,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 16:33:21,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:33:21,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663607127] [2021-08-29 16:33:21,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663607127] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 16:33:21,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 16:33:21,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-29 16:33:21,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317895965] [2021-08-29 16:33:21,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 16:33:21,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:33:21,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 16:33:21,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-29 16:33:21,129 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-29 16:33:21,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:33:21,219 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-08-29 16:33:21,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 16:33:21,221 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-29 16:33:21,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:33:21,225 INFO L225 Difference]: With dead ends: 25 [2021-08-29 16:33:21,226 INFO L226 Difference]: Without dead ends: 15 [2021-08-29 16:33:21,227 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.54ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-29 16:33:21,230 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.08ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.03ms IncrementalHoareTripleChecker+Time [2021-08-29 16:33:21,231 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 3 Invalid, 50 Unknown, 0 Unchecked, 1.08ms Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 60.03ms Time] [2021-08-29 16:33:21,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-08-29 16:33:21,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-08-29 16:33:21,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-29 16:33:21,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-08-29 16:33:21,254 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-08-29 16:33:21,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:33:21,255 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-08-29 16:33:21,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-29 16:33:21,255 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-08-29 16:33:21,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-29 16:33:21,256 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:33:21,256 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:33:21,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 16:33:21,257 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:33:21,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:33:21,258 INFO L82 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2021-08-29 16:33:21,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:33:21,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910283337] [2021-08-29 16:33:21,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:33:21,259 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:33:21,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:21,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:21,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:21,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:21,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:21,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 16:33:21,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:33:21,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910283337] [2021-08-29 16:33:21,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910283337] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:33:21,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880833295] [2021-08-29 16:33:21,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:33:21,377 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:33:21,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:33:21,381 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) [2021-08-29 16:33:21,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-29 16:33:21,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:21,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-29 16:33:21,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:33:21,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 16:33:21,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:33:21,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 16:33:21,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880833295] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:33:21,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:33:21,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2021-08-29 16:33:21,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234771127] [2021-08-29 16:33:21,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-29 16:33:21,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:33:21,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-29 16:33:21,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-29 16:33:21,728 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-29 16:33:21,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:33:21,783 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-08-29 16:33:21,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-29 16:33:21,784 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 16 [2021-08-29 16:33:21,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:33:21,785 INFO L225 Difference]: With dead ends: 22 [2021-08-29 16:33:21,785 INFO L226 Difference]: Without dead ends: 18 [2021-08-29 16:33:21,786 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 49.30ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-29 16:33:21,787 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 25 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.82ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.60ms IncrementalHoareTripleChecker+Time [2021-08-29 16:33:21,788 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 3 Invalid, 54 Unknown, 0 Unchecked, 0.82ms Time], IncrementalHoareTripleChecker [8 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 37.60ms Time] [2021-08-29 16:33:21,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-29 16:33:21,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-08-29 16:33:21,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-29 16:33:21,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-08-29 16:33:21,794 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2021-08-29 16:33:21,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:33:21,794 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-08-29 16:33:21,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-29 16:33:21,794 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-08-29 16:33:21,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-29 16:33:21,795 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:33:21,795 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:33:21,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-29 16:33:21,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:33:21,996 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:33:21,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:33:21,996 INFO L82 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2021-08-29 16:33:21,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:33:21,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909655665] [2021-08-29 16:33:21,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:33:21,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:33:22,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:22,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:22,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:22,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:22,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:22,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:22,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:22,074 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-29 16:33:22,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:33:22,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909655665] [2021-08-29 16:33:22,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909655665] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:33:22,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050087928] [2021-08-29 16:33:22,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 16:33:22,075 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:33:22,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:33:22,076 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) [2021-08-29 16:33:22,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-29 16:33:22,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 16:33:22,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:33:22,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-29 16:33:22,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:33:22,181 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-29 16:33:22,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:33:22,442 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-29 16:33:22,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050087928] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:33:22,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:33:22,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 12 [2021-08-29 16:33:22,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012918947] [2021-08-29 16:33:22,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-29 16:33:22,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:33:22,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-29 16:33:22,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-29 16:33:22,446 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2021-08-29 16:33:22,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:33:22,512 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-08-29 16:33:22,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-29 16:33:22,513 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 22 [2021-08-29 16:33:22,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:33:22,514 INFO L225 Difference]: With dead ends: 25 [2021-08-29 16:33:22,514 INFO L226 Difference]: Without dead ends: 21 [2021-08-29 16:33:22,514 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 53.75ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-08-29 16:33:22,516 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 23 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.31ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.14ms IncrementalHoareTripleChecker+Time [2021-08-29 16:33:22,517 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 3 Invalid, 73 Unknown, 0 Unchecked, 2.31ms Time], IncrementalHoareTripleChecker [6 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 43.14ms Time] [2021-08-29 16:33:22,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-29 16:33:22,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-08-29 16:33:22,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-08-29 16:33:22,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-08-29 16:33:22,528 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2021-08-29 16:33:22,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:33:22,528 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-08-29 16:33:22,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2021-08-29 16:33:22,529 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-08-29 16:33:22,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-29 16:33:22,531 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:33:22,531 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:33:22,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-29 16:33:22,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-29 16:33:22,734 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:33:22,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:33:22,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2021-08-29 16:33:22,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:33:22,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637790521] [2021-08-29 16:33:22,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:33:22,734 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:33:22,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:22,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:22,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:22,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:22,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:22,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:22,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:22,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:22,809 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-29 16:33:22,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:33:22,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637790521] [2021-08-29 16:33:22,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637790521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:33:22,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702962401] [2021-08-29 16:33:22,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-29 16:33:22,810 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:33:22,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:33:22,813 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) [2021-08-29 16:33:22,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-29 16:33:22,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-29 16:33:22,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:33:22,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-29 16:33:22,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:33:23,022 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-29 16:33:23,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:33:23,601 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-29 16:33:23,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702962401] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:33:23,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:33:23,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 21 [2021-08-29 16:33:23,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24663066] [2021-08-29 16:33:23,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-29 16:33:23,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:33:23,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-29 16:33:23,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-08-29 16:33:23,604 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 16 states have internal predecessors, (30), 4 states have call successors, (4), 1 states have call predecessors, (4), 8 states have return successors, (9), 9 states have call predecessors, (9), 4 states have call successors, (9) [2021-08-29 16:33:23,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:33:23,757 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-08-29 16:33:23,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-29 16:33:23,758 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 16 states have internal predecessors, (30), 4 states have call successors, (4), 1 states have call predecessors, (4), 8 states have return successors, (9), 9 states have call predecessors, (9), 4 states have call successors, (9) Word has length 28 [2021-08-29 16:33:23,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:33:23,759 INFO L225 Difference]: With dead ends: 28 [2021-08-29 16:33:23,759 INFO L226 Difference]: Without dead ends: 24 [2021-08-29 16:33:23,759 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 198.03ms TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-08-29 16:33:23,760 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 20 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 63.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.54ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 75.09ms IncrementalHoareTripleChecker+Time [2021-08-29 16:33:23,760 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 5 Invalid, 166 Unknown, 0 Unchecked, 1.54ms Time], IncrementalHoareTripleChecker [23 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 75.09ms Time] [2021-08-29 16:33:23,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-29 16:33:23,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-08-29 16:33:23,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2021-08-29 16:33:23,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-08-29 16:33:23,764 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2021-08-29 16:33:23,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:33:23,764 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-08-29 16:33:23,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 16 states have internal predecessors, (30), 4 states have call successors, (4), 1 states have call predecessors, (4), 8 states have return successors, (9), 9 states have call predecessors, (9), 4 states have call successors, (9) [2021-08-29 16:33:23,764 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-08-29 16:33:23,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-29 16:33:23,765 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:33:23,765 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:33:23,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-08-29 16:33:23,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:33:23,973 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:33:23,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:33:23,977 INFO L82 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2021-08-29 16:33:23,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:33:23,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358226422] [2021-08-29 16:33:23,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:33:23,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:33:23,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:24,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:24,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:24,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:24,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:24,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:24,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:24,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:24,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:24,109 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-08-29 16:33:24,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:33:24,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358226422] [2021-08-29 16:33:24,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358226422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:33:24,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997191072] [2021-08-29 16:33:24,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-29 16:33:24,109 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:33:24,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:33:24,110 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) [2021-08-29 16:33:24,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-29 16:33:24,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-29 16:33:24,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:33:24,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-29 16:33:24,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:33:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-08-29 16:33:24,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:33:24,729 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-29 16:33:24,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997191072] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:33:24,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:33:24,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 16 [2021-08-29 16:33:24,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403088843] [2021-08-29 16:33:24,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-29 16:33:24,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:33:24,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-29 16:33:24,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-08-29 16:33:24,733 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2021-08-29 16:33:24,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:33:24,818 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-08-29 16:33:24,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-29 16:33:24,818 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) Word has length 34 [2021-08-29 16:33:24,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:33:24,819 INFO L225 Difference]: With dead ends: 31 [2021-08-29 16:33:24,819 INFO L226 Difference]: Without dead ends: 27 [2021-08-29 16:33:24,820 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 87.75ms TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2021-08-29 16:33:24,821 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 16 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.70ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.86ms IncrementalHoareTripleChecker+Time [2021-08-29 16:33:24,821 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 4 Invalid, 96 Unknown, 0 Unchecked, 2.70ms Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 52.86ms Time] [2021-08-29 16:33:24,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-29 16:33:24,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-08-29 16:33:24,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2021-08-29 16:33:24,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-08-29 16:33:24,825 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2021-08-29 16:33:24,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:33:24,826 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-08-29 16:33:24,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2021-08-29 16:33:24,826 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-08-29 16:33:24,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-29 16:33:24,827 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:33:24,827 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:33:24,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-29 16:33:25,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:33:25,029 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:33:25,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:33:25,029 INFO L82 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2021-08-29 16:33:25,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:33:25,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854450192] [2021-08-29 16:33:25,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:33:25,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:33:25,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:25,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:25,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:25,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:25,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:25,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:25,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:25,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:25,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:25,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:25,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-08-29 16:33:25,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:33:25,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854450192] [2021-08-29 16:33:25,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854450192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:33:25,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630144369] [2021-08-29 16:33:25,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-29 16:33:25,166 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:33:25,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:33:25,169 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) [2021-08-29 16:33:25,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-29 16:33:25,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-29 16:33:25,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:33:25,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-29 16:33:25,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:33:25,301 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-08-29 16:33:25,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:33:26,052 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-29 16:33:26,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630144369] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:33:26,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:33:26,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 18 [2021-08-29 16:33:26,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743646965] [2021-08-29 16:33:26,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-29 16:33:26,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:33:26,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-29 16:33:26,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-08-29 16:33:26,055 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2021-08-29 16:33:26,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:33:26,165 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-08-29 16:33:26,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-29 16:33:26,166 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) Word has length 40 [2021-08-29 16:33:26,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:33:26,167 INFO L225 Difference]: With dead ends: 34 [2021-08-29 16:33:26,167 INFO L226 Difference]: Without dead ends: 30 [2021-08-29 16:33:26,168 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 108.54ms TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2021-08-29 16:33:26,172 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 32 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.24ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.77ms IncrementalHoareTripleChecker+Time [2021-08-29 16:33:26,172 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 4 Invalid, 123 Unknown, 0 Unchecked, 3.24ms Time], IncrementalHoareTripleChecker [11 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 61.77ms Time] [2021-08-29 16:33:26,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-29 16:33:26,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-08-29 16:33:26,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2021-08-29 16:33:26,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-08-29 16:33:26,182 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2021-08-29 16:33:26,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:33:26,183 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-08-29 16:33:26,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2021-08-29 16:33:26,183 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-08-29 16:33:26,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-29 16:33:26,184 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:33:26,185 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:33:26,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-29 16:33:26,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:33:26,401 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:33:26,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:33:26,401 INFO L82 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2021-08-29 16:33:26,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:33:26,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043804353] [2021-08-29 16:33:26,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:33:26,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:33:26,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:26,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:26,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:26,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:26,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:26,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:26,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:26,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:26,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:26,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:26,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:26,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:26,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:26,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:26,519 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-08-29 16:33:26,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:33:26,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043804353] [2021-08-29 16:33:26,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043804353] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:33:26,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949905156] [2021-08-29 16:33:26,519 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-29 16:33:26,520 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:33:26,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:33:26,520 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) [2021-08-29 16:33:26,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-29 16:33:26,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-29 16:33:26,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:33:26,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-29 16:33:26,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:33:26,845 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-08-29 16:33:26,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:33:28,775 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-08-29 16:33:28,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949905156] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:33:28,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:33:28,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19, 19] total 30 [2021-08-29 16:33:28,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231407063] [2021-08-29 16:33:28,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-29 16:33:28,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:33:28,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-29 16:33:28,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2021-08-29 16:33:28,779 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 30 states, 28 states have (on average 1.5) internal successors, (42), 22 states have internal predecessors, (42), 4 states have call successors, (4), 1 states have call predecessors, (4), 14 states have return successors, (15), 15 states have call predecessors, (15), 4 states have call successors, (15) [2021-08-29 16:33:29,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:33:29,058 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-08-29 16:33:29,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-29 16:33:29,058 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.5) internal successors, (42), 22 states have internal predecessors, (42), 4 states have call successors, (4), 1 states have call predecessors, (4), 14 states have return successors, (15), 15 states have call predecessors, (15), 4 states have call successors, (15) Word has length 46 [2021-08-29 16:33:29,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:33:29,059 INFO L225 Difference]: With dead ends: 37 [2021-08-29 16:33:29,059 INFO L226 Difference]: Without dead ends: 33 [2021-08-29 16:33:29,059 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 363.74ms TimeCoverageRelationStatistics Valid=324, Invalid=1568, Unknown=0, NotChecked=0, Total=1892 [2021-08-29 16:33:29,060 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 23 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 84.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.50ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 102.02ms IncrementalHoareTripleChecker+Time [2021-08-29 16:33:29,060 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 7 Invalid, 277 Unknown, 0 Unchecked, 1.50ms Time], IncrementalHoareTripleChecker [32 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 102.02ms Time] [2021-08-29 16:33:29,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-29 16:33:29,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-08-29 16:33:29,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2021-08-29 16:33:29,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-08-29 16:33:29,063 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2021-08-29 16:33:29,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:33:29,063 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-08-29 16:33:29,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.5) internal successors, (42), 22 states have internal predecessors, (42), 4 states have call successors, (4), 1 states have call predecessors, (4), 14 states have return successors, (15), 15 states have call predecessors, (15), 4 states have call successors, (15) [2021-08-29 16:33:29,063 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-08-29 16:33:29,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-29 16:33:29,064 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:33:29,064 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:33:29,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-29 16:33:29,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:33:29,277 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:33:29,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:33:29,277 INFO L82 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2021-08-29 16:33:29,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:33:29,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690085018] [2021-08-29 16:33:29,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:33:29,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:33:29,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:29,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:29,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:29,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:29,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:29,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:29,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:29,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:29,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:29,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:29,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:29,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:29,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:29,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:29,413 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-08-29 16:33:29,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:33:29,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690085018] [2021-08-29 16:33:29,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690085018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:33:29,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180828798] [2021-08-29 16:33:29,414 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-29 16:33:29,414 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:33:29,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:33:29,417 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) [2021-08-29 16:33:29,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-29 16:33:29,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:29,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-29 16:33:29,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:33:29,613 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-08-29 16:33:29,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:33:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-29 16:33:31,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180828798] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:33:31,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:33:31,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 22 [2021-08-29 16:33:31,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949425312] [2021-08-29 16:33:31,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-29 16:33:31,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:33:31,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-29 16:33:31,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-08-29 16:33:31,059 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2021-08-29 16:33:31,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:33:31,173 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-08-29 16:33:31,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-29 16:33:31,174 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) Word has length 52 [2021-08-29 16:33:31,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:33:31,174 INFO L225 Difference]: With dead ends: 40 [2021-08-29 16:33:31,174 INFO L226 Difference]: Without dead ends: 36 [2021-08-29 16:33:31,175 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 132.41ms TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2021-08-29 16:33:31,175 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 131 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.41ms SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 72.97ms IncrementalHoareTripleChecker+Time [2021-08-29 16:33:31,175 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 3 Invalid, 175 Unknown, 0 Unchecked, 1.41ms Time], IncrementalHoareTripleChecker [57 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 72.97ms Time] [2021-08-29 16:33:31,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-29 16:33:31,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-08-29 16:33:31,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2021-08-29 16:33:31,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-08-29 16:33:31,179 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2021-08-29 16:33:31,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:33:31,179 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-08-29 16:33:31,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2021-08-29 16:33:31,179 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-08-29 16:33:31,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-29 16:33:31,180 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:33:31,180 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:33:31,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-29 16:33:31,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:33:31,403 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:33:31,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:33:31,403 INFO L82 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2021-08-29 16:33:31,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:33:31,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61825262] [2021-08-29 16:33:31,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:33:31,403 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:33:31,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:31,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:31,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:31,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:31,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:31,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:31,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:31,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:31,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:31,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:31,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:31,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:31,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:31,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:31,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:31,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:31,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:31,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:31,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:31,568 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-08-29 16:33:31,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:33:31,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61825262] [2021-08-29 16:33:31,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61825262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:33:31,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342057683] [2021-08-29 16:33:31,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 16:33:31,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:33:31,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:33:31,573 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) [2021-08-29 16:33:31,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-29 16:33:31,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 16:33:31,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:33:31,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-29 16:33:31,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:33:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-08-29 16:33:31,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:33:33,647 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-08-29 16:33:33,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342057683] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:33:33,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:33:33,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 24 [2021-08-29 16:33:33,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873606006] [2021-08-29 16:33:33,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-29 16:33:33,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:33:33,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-29 16:33:33,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-08-29 16:33:33,649 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2021-08-29 16:33:33,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:33:33,773 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-08-29 16:33:33,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-29 16:33:33,774 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) Word has length 58 [2021-08-29 16:33:33,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:33:33,775 INFO L225 Difference]: With dead ends: 43 [2021-08-29 16:33:33,775 INFO L226 Difference]: Without dead ends: 39 [2021-08-29 16:33:33,775 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 156.59ms TimeCoverageRelationStatistics Valid=344, Invalid=712, Unknown=0, NotChecked=0, Total=1056 [2021-08-29 16:33:33,776 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 27 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.71ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 78.17ms IncrementalHoareTripleChecker+Time [2021-08-29 16:33:33,776 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 3 Invalid, 136 Unknown, 0 Unchecked, 0.71ms Time], IncrementalHoareTripleChecker [5 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 78.17ms Time] [2021-08-29 16:33:33,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-29 16:33:33,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-08-29 16:33:33,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2021-08-29 16:33:33,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-08-29 16:33:33,781 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2021-08-29 16:33:33,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:33:33,782 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-08-29 16:33:33,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2021-08-29 16:33:33,782 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-08-29 16:33:33,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-08-29 16:33:33,783 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:33:33,783 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:33:33,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-29 16:33:34,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-08-29 16:33:34,002 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:33:34,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:33:34,002 INFO L82 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2021-08-29 16:33:34,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:33:34,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963006562] [2021-08-29 16:33:34,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:33:34,002 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:33:34,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:34,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:34,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:34,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:34,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:34,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:34,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:34,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:34,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:34,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:34,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:34,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:34,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:34,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:34,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:34,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:34,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:34,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:33:34,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:33:34,197 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-08-29 16:33:34,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:33:34,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963006562] [2021-08-29 16:33:34,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963006562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:33:34,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327550816] [2021-08-29 16:33:34,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-29 16:33:34,198 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:33:34,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:33:34,198 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 16:33:34,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-29 16:33:34,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-29 16:33:34,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:33:34,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-29 16:33:34,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:33:34,708 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-08-29 16:33:34,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:33:39,829 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-08-29 16:33:39,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327550816] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:33:39,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:33:39,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 25, 25] total 38 [2021-08-29 16:33:39,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388852641] [2021-08-29 16:33:39,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-29 16:33:39,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:33:39,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-29 16:33:39,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1203, Unknown=0, NotChecked=0, Total=1406 [2021-08-29 16:33:39,830 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 38 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 27 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 20 states have return successors, (21), 21 states have call predecessors, (21), 3 states have call successors, (21) [2021-08-29 16:33:40,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:33:40,213 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-08-29 16:33:40,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-29 16:33:40,213 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 27 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 20 states have return successors, (21), 21 states have call predecessors, (21), 3 states have call successors, (21) Word has length 64 [2021-08-29 16:33:40,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:33:40,214 INFO L225 Difference]: With dead ends: 46 [2021-08-29 16:33:40,214 INFO L226 Difference]: Without dead ends: 42 [2021-08-29 16:33:40,215 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 574.25ms TimeCoverageRelationStatistics Valid=583, Invalid=2723, Unknown=0, NotChecked=0, Total=3306 [2021-08-29 16:33:40,215 INFO L928 BasicCegarLoop]: 2 mSDtfsCounter, 29 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 96.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.38ms SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 114.97ms IncrementalHoareTripleChecker+Time [2021-08-29 16:33:40,216 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 7 Invalid, 272 Unknown, 0 Unchecked, 1.38ms Time], IncrementalHoareTripleChecker [43 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 114.97ms Time] [2021-08-29 16:33:40,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-29 16:33:40,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-08-29 16:33:40,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2021-08-29 16:33:40,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-08-29 16:33:40,219 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2021-08-29 16:33:40,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:33:40,219 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-08-29 16:33:40,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 27 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 20 states have return successors, (21), 21 states have call predecessors, (21), 3 states have call successors, (21) [2021-08-29 16:33:40,219 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-08-29 16:33:40,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-29 16:33:40,223 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:33:40,223 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:33:40,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-29 16:33:40,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-29 16:33:40,429 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:33:40,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:33:40,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2021-08-29 16:33:40,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:33:40,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122552717] [2021-08-29 16:33:40,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:33:40,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:33:40,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 16:33:40,447 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-29 16:33:40,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 16:33:40,478 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-29 16:33:40,478 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-29 16:33:40,479 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 16:33:40,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-29 16:33:40,483 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 16:33:40,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 04:33:40 BoogieIcfgContainer [2021-08-29 16:33:40,532 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 16:33:40,532 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 16:33:40,532 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 16:33:40,533 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 16:33:40,533 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 04:33:20" (3/4) ... [2021-08-29 16:33:40,534 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-29 16:33:40,572 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 16:33:40,573 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 16:33:40,573 INFO L158 Benchmark]: Toolchain (without parser) took 20201.18ms. Allocated memory was 60.8MB in the beginning and 144.7MB in the end (delta: 83.9MB). Free memory was 40.1MB in the beginning and 93.6MB in the end (delta: -53.5MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2021-08-29 16:33:40,573 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 60.8MB. Free memory was 43.3MB in the beginning and 43.3MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 16:33:40,574 INFO L158 Benchmark]: CACSL2BoogieTranslator took 131.50ms. Allocated memory is still 60.8MB. Free memory was 40.0MB in the beginning and 30.8MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 16:33:40,574 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.23ms. Allocated memory is still 60.8MB. Free memory was 30.8MB in the beginning and 44.6MB in the end (delta: -13.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-29 16:33:40,574 INFO L158 Benchmark]: Boogie Preprocessor took 10.31ms. Allocated memory is still 60.8MB. Free memory was 44.6MB in the beginning and 43.7MB in the end (delta: 877.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 16:33:40,574 INFO L158 Benchmark]: RCFGBuilder took 182.00ms. Allocated memory is still 60.8MB. Free memory was 43.7MB in the beginning and 35.5MB in the end (delta: 8.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-08-29 16:33:40,575 INFO L158 Benchmark]: TraceAbstraction took 19789.52ms. Allocated memory was 60.8MB in the beginning and 144.7MB in the end (delta: 83.9MB). Free memory was 34.9MB in the beginning and 97.8MB in the end (delta: -62.9MB). Peak memory consumption was 22.2MB. Max. memory is 16.1GB. [2021-08-29 16:33:40,575 INFO L158 Benchmark]: Witness Printer took 40.45ms. Allocated memory is still 144.7MB. Free memory was 97.8MB in the beginning and 93.6MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-29 16:33:40,577 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 60.8MB. Free memory was 43.3MB in the beginning and 43.3MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 131.50ms. Allocated memory is still 60.8MB. Free memory was 40.0MB in the beginning and 30.8MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.23ms. Allocated memory is still 60.8MB. Free memory was 30.8MB in the beginning and 44.6MB in the end (delta: -13.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 10.31ms. Allocated memory is still 60.8MB. Free memory was 44.6MB in the beginning and 43.7MB in the end (delta: 877.9kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 182.00ms. Allocated memory is still 60.8MB. Free memory was 43.7MB in the beginning and 35.5MB in the end (delta: 8.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * TraceAbstraction took 19789.52ms. Allocated memory was 60.8MB in the beginning and 144.7MB in the end (delta: 83.9MB). Free memory was 34.9MB in the beginning and 97.8MB in the end (delta: -62.9MB). Peak memory consumption was 22.2MB. Max. memory is 16.1GB. * Witness Printer took 40.45ms. Allocated memory is still 144.7MB. Free memory was 97.8MB in the beginning and 93.6MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] int a = 10; [L15] int b = 0; [L16] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=10] [L6] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=10, m=0, n=10] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=9] [L6] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=9, m=1, n=9] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=8] [L6] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=8, m=2, n=8] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=7] [L6] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=7, m=3, n=7] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=6] [L6] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=6, m=4, n=6] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=5] [L6] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=5, m=5, n=5] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=4] [L6] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=4, m=6, n=4] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=3] [L6] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=3, m=7, n=3] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=2] [L6] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=2, m=8, n=2] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=1] [L6] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=1, m=9, n=1] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=0] [L6] COND TRUE n <= 0 [L7] return m + n; VAL [\old(m)=10, \old(n)=0, \result=10, m=10, n=0] [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=1, m=9, n=1, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=2, m=8, n=2, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=3, m=7, n=3, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=4, m=6, n=4, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=5, m=5, n=5, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=6, m=4, n=6, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=7, m=3, n=7, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=8, m=2, n=8, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=9, m=1, n=9, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=10, m=0, n=10, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L16] RET, EXPR sum(a, b) [L16] int result = sum(a, b); [L17] COND TRUE result == a + b [L18] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 19694.82ms, OverallIterations: 11, TraceHistogramMax: 11, EmptinessCheckTime: 17.20ms, AutomataDifference: 1552.18ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 8.93ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 388 SdHoareTripleChecker+Valid, 698.61ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 337 mSDsluCounter, 42 SdHoareTripleChecker+Invalid, 562.17ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 505 mSDsCounter, 188 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1234 IncrementalHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 188 mSolverCounterUnsat, 20 mSDtfsCounter, 1234 mSolverCounterSat, 16.70ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 973 GetRequests, 719 SyntacticMatches, 2 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 1773.89ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=10, InterpolantAutomatonStates: 113, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 56.81ms AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 65.46ms SsaConstructionTime, 274.75ms SatisfiabilityAnalysisTime, 15110.84ms InterpolantComputationTime, 800 NumberOfCodeBlocks, 794 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 1062 ConstructedInterpolants, 0 QuantifiedInterpolants, 3164 SizeOfPredicates, 69 NumberOfNonLiveVariables, 1283 ConjunctsInSsa, 174 ConjunctsInUnsatCore, 28 InterpolantComputations, 1 PerfectInterpolantSequences, 1191/2700 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-29 16:33:40,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...