./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/product-lines/minepump_spec4_product44.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec 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/product-lines/minepump_spec4_product44.cil.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 29fd7ebbcc9514a740018fa1c2ef695c1d81ea72 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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-dev-20ed64e [2021-08-26 08:44:50,345 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 08:44:50,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 08:44:50,379 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 08:44:50,379 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 08:44:50,383 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 08:44:50,384 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 08:44:50,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 08:44:50,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 08:44:50,396 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 08:44:50,397 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 08:44:50,400 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 08:44:50,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 08:44:50,403 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 08:44:50,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 08:44:50,407 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 08:44:50,408 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 08:44:50,410 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 08:44:50,411 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 08:44:50,414 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 08:44:50,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 08:44:50,417 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 08:44:50,419 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 08:44:50,420 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 08:44:50,423 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 08:44:50,423 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 08:44:50,432 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 08:44:50,434 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 08:44:50,434 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 08:44:50,435 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 08:44:50,435 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 08:44:50,436 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 08:44:50,437 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 08:44:50,438 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 08:44:50,439 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 08:44:50,439 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 08:44:50,439 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 08:44:50,439 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 08:44:50,440 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 08:44:50,441 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 08:44:50,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 08:44:50,442 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 08:44:50,467 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 08:44:50,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 08:44:50,467 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 08:44:50,467 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 08:44:50,468 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 08:44:50,468 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 08:44:50,469 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 08:44:50,469 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 08:44:50,469 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 08:44:50,469 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 08:44:50,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 08:44:50,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 08:44:50,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 08:44:50,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 08:44:50,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 08:44:50,470 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 08:44:50,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 08:44:50,470 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 08:44:50,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 08:44:50,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 08:44:50,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 08:44:50,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 08:44:50,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 08:44:50,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 08:44:50,471 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 08:44:50,471 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 08:44:50,472 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 08:44:50,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 08:44:50,472 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 08:44:50,472 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 08:44:50,472 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 29fd7ebbcc9514a740018fa1c2ef695c1d81ea72 [2021-08-26 08:44:50,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 08:44:50,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 08:44:50,731 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 08:44:50,732 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 08:44:50,733 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 08:44:50,733 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/minepump_spec4_product44.cil.c [2021-08-26 08:44:50,777 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c39b23541/4bebfb11e29b43c09b4300547083bf78/FLAG09f32b9fa [2021-08-26 08:44:51,267 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 08:44:51,268 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/minepump_spec4_product44.cil.c [2021-08-26 08:44:51,282 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c39b23541/4bebfb11e29b43c09b4300547083bf78/FLAG09f32b9fa [2021-08-26 08:44:51,291 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c39b23541/4bebfb11e29b43c09b4300547083bf78 [2021-08-26 08:44:51,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 08:44:51,294 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 08:44:51,295 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 08:44:51,295 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 08:44:51,297 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 08:44:51,298 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 08:44:51" (1/1) ... [2021-08-26 08:44:51,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c65018c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:44:51, skipping insertion in model container [2021-08-26 08:44:51,299 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 08:44:51" (1/1) ... [2021-08-26 08:44:51,303 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 08:44:51,339 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 08:44:51,513 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/product-lines/minepump_spec4_product44.cil.c[15482,15495] [2021-08-26 08:44:51,522 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 08:44:51,528 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 08:44:51,582 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/product-lines/minepump_spec4_product44.cil.c[15482,15495] [2021-08-26 08:44:51,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 08:44:51,602 INFO L208 MainTranslator]: Completed translation [2021-08-26 08:44:51,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:44:51 WrapperNode [2021-08-26 08:44:51,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 08:44:51,604 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 08:44:51,604 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 08:44:51,604 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 08:44:51,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:44:51" (1/1) ... [2021-08-26 08:44:51,621 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:44:51" (1/1) ... [2021-08-26 08:44:51,648 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 08:44:51,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 08:44:51,649 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 08:44:51,649 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 08:44:51,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:44:51" (1/1) ... [2021-08-26 08:44:51,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:44:51" (1/1) ... [2021-08-26 08:44:51,658 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:44:51" (1/1) ... [2021-08-26 08:44:51,658 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:44:51" (1/1) ... [2021-08-26 08:44:51,663 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:44:51" (1/1) ... [2021-08-26 08:44:51,670 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:44:51" (1/1) ... [2021-08-26 08:44:51,671 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:44:51" (1/1) ... [2021-08-26 08:44:51,673 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 08:44:51,674 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 08:44:51,674 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 08:44:51,674 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 08:44:51,675 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:44:51" (1/1) ... [2021-08-26 08:44:51,693 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 08:44:51,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 08:44:51,734 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) [2021-08-26 08:44:51,739 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 [2021-08-26 08:44:51,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 08:44:51,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 08:44:51,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 08:44:51,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 08:44:52,365 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 08:44:52,365 INFO L299 CfgBuilder]: Removed 120 assume(true) statements. [2021-08-26 08:44:52,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:44:52 BoogieIcfgContainer [2021-08-26 08:44:52,367 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 08:44:52,369 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 08:44:52,369 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 08:44:52,371 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 08:44:52,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 08:44:51" (1/3) ... [2021-08-26 08:44:52,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f06a674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 08:44:52, skipping insertion in model container [2021-08-26 08:44:52,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:44:51" (2/3) ... [2021-08-26 08:44:52,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f06a674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 08:44:52, skipping insertion in model container [2021-08-26 08:44:52,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:44:52" (3/3) ... [2021-08-26 08:44:52,375 INFO L111 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product44.cil.c [2021-08-26 08:44:52,379 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 08:44:52,379 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-08-26 08:44:52,417 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 08:44:52,429 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 [2021-08-26 08:44:52,429 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-26 08:44:52,444 INFO L276 IsEmpty]: Start isEmpty. Operand has 89 states, 85 states have (on average 1.5529411764705883) internal successors, (132), 88 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:52,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-26 08:44:52,448 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 08:44:52,449 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 08:44:52,450 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 08:44:52,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 08:44:52,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1782116946, now seen corresponding path program 1 times [2021-08-26 08:44:52,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 08:44:52,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486035224] [2021-08-26 08:44:52,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 08:44:52,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 08:44:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 08:44:52,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 08:44:52,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 08:44:52,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486035224] [2021-08-26 08:44:52,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486035224] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 08:44:52,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 08:44:52,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 08:44:52,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912406327] [2021-08-26 08:44:52,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 08:44:52,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 08:44:52,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 08:44:52,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 08:44:52,670 INFO L87 Difference]: Start difference. First operand has 89 states, 85 states have (on average 1.5529411764705883) internal successors, (132), 88 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:52,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 08:44:52,701 INFO L93 Difference]: Finished difference Result 172 states and 257 transitions. [2021-08-26 08:44:52,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 08:44:52,702 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-26 08:44:52,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 08:44:52,708 INFO L225 Difference]: With dead ends: 172 [2021-08-26 08:44:52,709 INFO L226 Difference]: Without dead ends: 85 [2021-08-26 08:44:52,711 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 08:44:52,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-08-26 08:44:52,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-08-26 08:44:52,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 82 states have (on average 1.4634146341463414) internal successors, (120), 84 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:52,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 120 transitions. [2021-08-26 08:44:52,751 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 120 transitions. Word has length 16 [2021-08-26 08:44:52,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 08:44:52,752 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 120 transitions. [2021-08-26 08:44:52,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:52,753 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 120 transitions. [2021-08-26 08:44:52,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-26 08:44:52,754 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 08:44:52,754 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 08:44:52,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 08:44:52,754 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 08:44:52,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 08:44:52,756 INFO L82 PathProgramCache]: Analyzing trace with hash 735360049, now seen corresponding path program 1 times [2021-08-26 08:44:52,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 08:44:52,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91475789] [2021-08-26 08:44:52,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 08:44:52,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 08:44:52,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 08:44:52,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 08:44:52,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 08:44:52,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91475789] [2021-08-26 08:44:52,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91475789] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 08:44:52,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 08:44:52,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 08:44:52,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563906581] [2021-08-26 08:44:52,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 08:44:52,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 08:44:52,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 08:44:52,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 08:44:52,855 INFO L87 Difference]: Start difference. First operand 85 states and 120 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:52,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 08:44:52,862 INFO L93 Difference]: Finished difference Result 85 states and 120 transitions. [2021-08-26 08:44:52,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 08:44:52,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-26 08:44:52,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 08:44:52,863 INFO L225 Difference]: With dead ends: 85 [2021-08-26 08:44:52,863 INFO L226 Difference]: Without dead ends: 39 [2021-08-26 08:44:52,864 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 08:44:52,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-26 08:44:52,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-08-26 08:44:52,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 38 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:52,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 55 transitions. [2021-08-26 08:44:52,867 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 55 transitions. Word has length 17 [2021-08-26 08:44:52,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 08:44:52,867 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 55 transitions. [2021-08-26 08:44:52,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:52,867 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 55 transitions. [2021-08-26 08:44:52,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-26 08:44:52,868 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 08:44:52,868 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 08:44:52,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 08:44:52,868 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 08:44:52,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 08:44:52,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1297648259, now seen corresponding path program 1 times [2021-08-26 08:44:52,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 08:44:52,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567353691] [2021-08-26 08:44:52,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 08:44:52,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 08:44:52,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 08:44:52,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 08:44:52,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 08:44:52,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567353691] [2021-08-26 08:44:52,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567353691] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 08:44:52,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 08:44:52,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 08:44:52,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830746969] [2021-08-26 08:44:52,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 08:44:52,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 08:44:52,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 08:44:52,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 08:44:52,935 INFO L87 Difference]: Start difference. First operand 39 states and 55 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:52,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 08:44:52,968 INFO L93 Difference]: Finished difference Result 105 states and 153 transitions. [2021-08-26 08:44:52,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 08:44:52,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-26 08:44:52,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 08:44:52,974 INFO L225 Difference]: With dead ends: 105 [2021-08-26 08:44:52,974 INFO L226 Difference]: Without dead ends: 72 [2021-08-26 08:44:52,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 08:44:52,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-26 08:44:52,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2021-08-26 08:44:52,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.4776119402985075) internal successors, (99), 67 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:52,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 99 transitions. [2021-08-26 08:44:52,984 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 99 transitions. Word has length 22 [2021-08-26 08:44:52,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 08:44:52,984 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 99 transitions. [2021-08-26 08:44:52,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:52,985 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 99 transitions. [2021-08-26 08:44:52,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-26 08:44:52,986 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 08:44:52,986 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 08:44:52,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-26 08:44:52,987 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 08:44:52,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 08:44:52,988 INFO L82 PathProgramCache]: Analyzing trace with hash -372126526, now seen corresponding path program 1 times [2021-08-26 08:44:52,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 08:44:52,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180410608] [2021-08-26 08:44:52,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 08:44:52,988 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 08:44:53,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 08:44:53,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 08:44:53,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 08:44:53,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180410608] [2021-08-26 08:44:53,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180410608] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 08:44:53,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 08:44:53,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 08:44:53,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865220659] [2021-08-26 08:44:53,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 08:44:53,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 08:44:53,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 08:44:53,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 08:44:53,046 INFO L87 Difference]: Start difference. First operand 68 states and 99 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:53,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 08:44:53,069 INFO L93 Difference]: Finished difference Result 171 states and 254 transitions. [2021-08-26 08:44:53,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 08:44:53,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-26 08:44:53,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 08:44:53,070 INFO L225 Difference]: With dead ends: 171 [2021-08-26 08:44:53,070 INFO L226 Difference]: Without dead ends: 109 [2021-08-26 08:44:53,071 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 08:44:53,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-08-26 08:44:53,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2021-08-26 08:44:53,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.4622641509433962) internal successors, (155), 106 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:53,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 155 transitions. [2021-08-26 08:44:53,077 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 155 transitions. Word has length 23 [2021-08-26 08:44:53,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 08:44:53,078 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 155 transitions. [2021-08-26 08:44:53,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:53,078 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 155 transitions. [2021-08-26 08:44:53,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-26 08:44:53,079 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 08:44:53,079 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 08:44:53,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-26 08:44:53,079 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 08:44:53,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 08:44:53,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1852423790, now seen corresponding path program 1 times [2021-08-26 08:44:53,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 08:44:53,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613940915] [2021-08-26 08:44:53,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 08:44:53,080 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 08:44:53,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 08:44:53,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 08:44:53,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 08:44:53,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613940915] [2021-08-26 08:44:53,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613940915] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 08:44:53,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 08:44:53,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 08:44:53,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522365717] [2021-08-26 08:44:53,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 08:44:53,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 08:44:53,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 08:44:53,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 08:44:53,133 INFO L87 Difference]: Start difference. First operand 107 states and 155 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:53,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 08:44:53,209 INFO L93 Difference]: Finished difference Result 399 states and 585 transitions. [2021-08-26 08:44:53,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 08:44:53,210 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-26 08:44:53,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 08:44:53,212 INFO L225 Difference]: With dead ends: 399 [2021-08-26 08:44:53,212 INFO L226 Difference]: Without dead ends: 298 [2021-08-26 08:44:53,214 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-26 08:44:53,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-08-26 08:44:53,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 194. [2021-08-26 08:44:53,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.4093264248704662) internal successors, (272), 193 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:53,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 272 transitions. [2021-08-26 08:44:53,242 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 272 transitions. Word has length 25 [2021-08-26 08:44:53,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 08:44:53,243 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 272 transitions. [2021-08-26 08:44:53,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:53,243 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 272 transitions. [2021-08-26 08:44:53,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-26 08:44:53,246 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 08:44:53,246 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 08:44:53,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-26 08:44:53,247 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 08:44:53,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 08:44:53,247 INFO L82 PathProgramCache]: Analyzing trace with hash 483234516, now seen corresponding path program 1 times [2021-08-26 08:44:53,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 08:44:53,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191140943] [2021-08-26 08:44:53,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 08:44:53,248 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 08:44:53,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 08:44:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 08:44:53,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 08:44:53,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191140943] [2021-08-26 08:44:53,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191140943] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 08:44:53,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 08:44:53,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 08:44:53,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950822957] [2021-08-26 08:44:53,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 08:44:53,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 08:44:53,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 08:44:53,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 08:44:53,288 INFO L87 Difference]: Start difference. First operand 194 states and 272 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:53,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 08:44:53,361 INFO L93 Difference]: Finished difference Result 398 states and 570 transitions. [2021-08-26 08:44:53,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 08:44:53,361 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-26 08:44:53,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 08:44:53,363 INFO L225 Difference]: With dead ends: 398 [2021-08-26 08:44:53,363 INFO L226 Difference]: Without dead ends: 396 [2021-08-26 08:44:53,363 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-26 08:44:53,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-08-26 08:44:53,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 194. [2021-08-26 08:44:53,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.3989637305699483) internal successors, (270), 193 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:53,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 270 transitions. [2021-08-26 08:44:53,373 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 270 transitions. Word has length 26 [2021-08-26 08:44:53,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 08:44:53,373 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 270 transitions. [2021-08-26 08:44:53,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:53,373 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 270 transitions. [2021-08-26 08:44:53,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-26 08:44:53,374 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 08:44:53,374 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 08:44:53,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-26 08:44:53,375 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 08:44:53,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 08:44:53,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1957615203, now seen corresponding path program 1 times [2021-08-26 08:44:53,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 08:44:53,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748596666] [2021-08-26 08:44:53,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 08:44:53,376 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 08:44:53,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 08:44:53,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 08:44:53,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 08:44:53,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748596666] [2021-08-26 08:44:53,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748596666] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 08:44:53,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 08:44:53,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 08:44:53,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975864030] [2021-08-26 08:44:53,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 08:44:53,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 08:44:53,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 08:44:53,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 08:44:53,425 INFO L87 Difference]: Start difference. First operand 194 states and 270 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:53,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 08:44:53,473 INFO L93 Difference]: Finished difference Result 392 states and 557 transitions. [2021-08-26 08:44:53,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 08:44:53,474 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-26 08:44:53,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 08:44:53,474 INFO L225 Difference]: With dead ends: 392 [2021-08-26 08:44:53,474 INFO L226 Difference]: Without dead ends: 291 [2021-08-26 08:44:53,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 08:44:53,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-08-26 08:44:53,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 287. [2021-08-26 08:44:53,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.3951048951048952) internal successors, (399), 286 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:53,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 399 transitions. [2021-08-26 08:44:53,485 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 399 transitions. Word has length 33 [2021-08-26 08:44:53,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 08:44:53,485 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 399 transitions. [2021-08-26 08:44:53,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:53,485 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 399 transitions. [2021-08-26 08:44:53,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-26 08:44:53,486 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 08:44:53,486 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 08:44:53,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-26 08:44:53,486 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 08:44:53,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 08:44:53,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1057488415, now seen corresponding path program 1 times [2021-08-26 08:44:53,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 08:44:53,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128192100] [2021-08-26 08:44:53,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 08:44:53,487 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 08:44:53,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 08:44:53,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 08:44:53,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 08:44:53,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128192100] [2021-08-26 08:44:53,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128192100] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 08:44:53,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 08:44:53,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 08:44:53,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264829196] [2021-08-26 08:44:53,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 08:44:53,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 08:44:53,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 08:44:53,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 08:44:53,520 INFO L87 Difference]: Start difference. First operand 287 states and 399 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:53,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 08:44:53,560 INFO L93 Difference]: Finished difference Result 818 states and 1157 transitions. [2021-08-26 08:44:53,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 08:44:53,561 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-26 08:44:53,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 08:44:53,562 INFO L225 Difference]: With dead ends: 818 [2021-08-26 08:44:53,562 INFO L226 Difference]: Without dead ends: 622 [2021-08-26 08:44:53,563 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 08:44:53,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-08-26 08:44:53,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 287. [2021-08-26 08:44:53,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.3881118881118881) internal successors, (397), 286 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:53,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 397 transitions. [2021-08-26 08:44:53,576 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 397 transitions. Word has length 33 [2021-08-26 08:44:53,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 08:44:53,576 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 397 transitions. [2021-08-26 08:44:53,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:53,576 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 397 transitions. [2021-08-26 08:44:53,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-26 08:44:53,577 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 08:44:53,577 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 08:44:53,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-26 08:44:53,577 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 08:44:53,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 08:44:53,578 INFO L82 PathProgramCache]: Analyzing trace with hash 470682401, now seen corresponding path program 1 times [2021-08-26 08:44:53,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 08:44:53,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919483095] [2021-08-26 08:44:53,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 08:44:53,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 08:44:53,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 08:44:53,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 08:44:53,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 08:44:53,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919483095] [2021-08-26 08:44:53,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919483095] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 08:44:53,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 08:44:53,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 08:44:53,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562586041] [2021-08-26 08:44:53,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 08:44:53,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 08:44:53,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 08:44:53,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 08:44:53,641 INFO L87 Difference]: Start difference. First operand 287 states and 397 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:53,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 08:44:53,739 INFO L93 Difference]: Finished difference Result 609 states and 854 transitions. [2021-08-26 08:44:53,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 08:44:53,739 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-26 08:44:53,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 08:44:53,741 INFO L225 Difference]: With dead ends: 609 [2021-08-26 08:44:53,741 INFO L226 Difference]: Without dead ends: 413 [2021-08-26 08:44:53,743 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-26 08:44:53,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-08-26 08:44:53,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 318. [2021-08-26 08:44:53,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 1.3974763406940063) internal successors, (443), 317 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:53,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 443 transitions. [2021-08-26 08:44:53,759 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 443 transitions. Word has length 33 [2021-08-26 08:44:53,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 08:44:53,761 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 443 transitions. [2021-08-26 08:44:53,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:53,761 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 443 transitions. [2021-08-26 08:44:53,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-26 08:44:53,763 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 08:44:53,764 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 08:44:53,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-26 08:44:53,764 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 08:44:53,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 08:44:53,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1538071243, now seen corresponding path program 1 times [2021-08-26 08:44:53,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 08:44:53,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516816732] [2021-08-26 08:44:53,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 08:44:53,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 08:44:53,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 08:44:53,828 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-26 08:44:53,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 08:44:53,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516816732] [2021-08-26 08:44:53,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516816732] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 08:44:53,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 08:44:53,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 08:44:53,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973680853] [2021-08-26 08:44:53,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 08:44:53,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 08:44:53,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 08:44:53,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 08:44:53,830 INFO L87 Difference]: Start difference. First operand 318 states and 443 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:53,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 08:44:53,876 INFO L93 Difference]: Finished difference Result 902 states and 1251 transitions. [2021-08-26 08:44:53,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 08:44:53,876 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-26 08:44:53,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 08:44:53,878 INFO L225 Difference]: With dead ends: 902 [2021-08-26 08:44:53,879 INFO L226 Difference]: Without dead ends: 590 [2021-08-26 08:44:53,879 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-26 08:44:53,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-08-26 08:44:53,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 330. [2021-08-26 08:44:53,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 1.3829787234042554) internal successors, (455), 329 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:53,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 455 transitions. [2021-08-26 08:44:53,895 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 455 transitions. Word has length 47 [2021-08-26 08:44:53,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 08:44:53,896 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 455 transitions. [2021-08-26 08:44:53,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:53,897 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 455 transitions. [2021-08-26 08:44:53,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-26 08:44:53,897 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 08:44:53,897 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 08:44:53,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-26 08:44:53,897 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 08:44:53,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 08:44:53,898 INFO L82 PathProgramCache]: Analyzing trace with hash -2047544333, now seen corresponding path program 1 times [2021-08-26 08:44:53,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 08:44:53,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782104885] [2021-08-26 08:44:53,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 08:44:53,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 08:44:53,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 08:44:53,930 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-26 08:44:53,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 08:44:53,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782104885] [2021-08-26 08:44:53,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782104885] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 08:44:53,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 08:44:53,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 08:44:53,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112196907] [2021-08-26 08:44:53,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 08:44:53,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 08:44:53,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 08:44:53,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 08:44:53,932 INFO L87 Difference]: Start difference. First operand 330 states and 455 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:54,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 08:44:54,007 INFO L93 Difference]: Finished difference Result 714 states and 974 transitions. [2021-08-26 08:44:54,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 08:44:54,008 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-26 08:44:54,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 08:44:54,010 INFO L225 Difference]: With dead ends: 714 [2021-08-26 08:44:54,010 INFO L226 Difference]: Without dead ends: 390 [2021-08-26 08:44:54,010 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-26 08:44:54,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-08-26 08:44:54,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 261. [2021-08-26 08:44:54,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.35) internal successors, (351), 260 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:54,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 351 transitions. [2021-08-26 08:44:54,026 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 351 transitions. Word has length 47 [2021-08-26 08:44:54,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 08:44:54,026 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 351 transitions. [2021-08-26 08:44:54,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:54,026 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 351 transitions. [2021-08-26 08:44:54,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-26 08:44:54,027 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 08:44:54,027 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 08:44:54,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-26 08:44:54,028 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 08:44:54,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 08:44:54,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1853071629, now seen corresponding path program 1 times [2021-08-26 08:44:54,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 08:44:54,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639517521] [2021-08-26 08:44:54,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 08:44:54,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 08:44:54,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 08:44:54,097 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 08:44:54,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 08:44:54,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639517521] [2021-08-26 08:44:54,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639517521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 08:44:54,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834545545] [2021-08-26 08:44:54,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 08:44:54,100 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 08:44:54,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 08:44:54,101 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) [2021-08-26 08:44:54,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 08:44:54,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 08:44:54,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-26 08:44:54,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 08:44:54,436 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 08:44:54,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834545545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 08:44:54,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 08:44:54,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-26 08:44:54,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083977760] [2021-08-26 08:44:54,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 08:44:54,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 08:44:54,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 08:44:54,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-26 08:44:54,438 INFO L87 Difference]: Start difference. First operand 261 states and 351 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:54,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 08:44:54,606 INFO L93 Difference]: Finished difference Result 735 states and 1011 transitions. [2021-08-26 08:44:54,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 08:44:54,607 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-26 08:44:54,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 08:44:54,608 INFO L225 Difference]: With dead ends: 735 [2021-08-26 08:44:54,609 INFO L226 Difference]: Without dead ends: 534 [2021-08-26 08:44:54,609 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-26 08:44:54,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-08-26 08:44:54,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 321. [2021-08-26 08:44:54,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.353125) internal successors, (433), 320 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:54,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 433 transitions. [2021-08-26 08:44:54,633 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 433 transitions. Word has length 48 [2021-08-26 08:44:54,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 08:44:54,634 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 433 transitions. [2021-08-26 08:44:54,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:44:54,634 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 433 transitions. [2021-08-26 08:44:54,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-08-26 08:44:54,634 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 08:44:54,635 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 08:44:54,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-26 08:44:54,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-26 08:44:54,856 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 08:44:54,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 08:44:54,856 INFO L82 PathProgramCache]: Analyzing trace with hash 82160865, now seen corresponding path program 2 times [2021-08-26 08:44:54,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 08:44:54,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726238971] [2021-08-26 08:44:54,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 08:44:54,856 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 08:44:54,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 08:44:54,911 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 08:44:54,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 08:44:54,972 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 08:44:54,972 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 08:44:54,973 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 08:44:54,974 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 08:44:54,974 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 08:44:54,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-26 08:44:54,978 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 08:44:55,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 08:44:55 BoogieIcfgContainer [2021-08-26 08:44:55,059 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 08:44:55,060 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 08:44:55,060 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 08:44:55,060 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 08:44:55,060 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:44:52" (3/4) ... [2021-08-26 08:44:55,062 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-26 08:44:55,119 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 08:44:55,120 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 08:44:55,121 INFO L168 Benchmark]: Toolchain (without parser) took 3826.38 ms. Allocated memory was 69.2 MB in the beginning and 134.2 MB in the end (delta: 65.0 MB). Free memory was 48.4 MB in the beginning and 36.1 MB in the end (delta: 12.3 MB). Peak memory consumption was 76.9 MB. Max. memory is 16.1 GB. [2021-08-26 08:44:55,121 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 69.2 MB. Free memory was 49.9 MB in the beginning and 49.9 MB in the end (delta: 29.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 08:44:55,121 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.45 ms. Allocated memory is still 69.2 MB. Free memory was 48.2 MB in the beginning and 44.3 MB in the end (delta: 3.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 08:44:55,121 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.48 ms. Allocated memory is still 69.2 MB. Free memory was 44.3 MB in the beginning and 41.0 MB in the end (delta: 3.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 08:44:55,121 INFO L168 Benchmark]: Boogie Preprocessor took 24.96 ms. Allocated memory is still 69.2 MB. Free memory was 41.0 MB in the beginning and 38.7 MB in the end (delta: 2.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 08:44:55,122 INFO L168 Benchmark]: RCFGBuilder took 693.62 ms. Allocated memory was 69.2 MB in the beginning and 92.3 MB in the end (delta: 23.1 MB). Free memory was 38.7 MB in the beginning and 47.3 MB in the end (delta: -8.6 MB). Peak memory consumption was 22.4 MB. Max. memory is 16.1 GB. [2021-08-26 08:44:55,132 INFO L168 Benchmark]: TraceAbstraction took 2690.82 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 46.8 MB in the beginning and 60.3 MB in the end (delta: -13.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 16.1 GB. [2021-08-26 08:44:55,132 INFO L168 Benchmark]: Witness Printer took 59.73 ms. Allocated memory is still 134.2 MB. Free memory was 60.3 MB in the beginning and 36.1 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-08-26 08:44:55,133 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 69.2 MB. Free memory was 49.9 MB in the beginning and 49.9 MB in the end (delta: 29.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 308.45 ms. Allocated memory is still 69.2 MB. Free memory was 48.2 MB in the beginning and 44.3 MB in the end (delta: 3.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.48 ms. Allocated memory is still 69.2 MB. Free memory was 44.3 MB in the beginning and 41.0 MB in the end (delta: 3.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.96 ms. Allocated memory is still 69.2 MB. Free memory was 41.0 MB in the beginning and 38.7 MB in the end (delta: 2.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 693.62 ms. Allocated memory was 69.2 MB in the beginning and 92.3 MB in the end (delta: 23.1 MB). Free memory was 38.7 MB in the beginning and 47.3 MB in the end (delta: -8.6 MB). Peak memory consumption was 22.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2690.82 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 46.8 MB in the beginning and 60.3 MB in the end (delta: -13.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 16.1 GB. * Witness Printer took 59.73 ms. Allocated memory is still 134.2 MB. Free memory was 60.3 MB in the beginning and 36.1 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 754]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L240] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L557] int pumpRunning = 0; [L558] int systemActive = 1; [L759] int cleanupTimeShifts = 4; [L855] int waterLevel = 1; [L856] int methaneLevelCritical = 0; VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L832] int retValue_acc ; [L833] int tmp ; VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L466] int retValue_acc ; [L469] retValue_acc = 1 [L470] return (retValue_acc); VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L839] tmp = valid_product() [L841] COND TRUE \read(tmp) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L482] int splverifierCounter ; [L483] int tmp ; [L484] int tmp___0 ; [L485] int tmp___1 ; [L486] int tmp___2 ; [L489] splverifierCounter = 0 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L491] COND TRUE 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L493] COND TRUE splverifierCounter < 4 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L499] tmp = __VERIFIER_nondet_int() [L501] COND TRUE \read(tmp) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L873] COND TRUE waterLevel < 2 [L874] waterLevel = waterLevel + 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L509] tmp___0 = __VERIFIER_nondet_int() [L511] COND FALSE !(\read(tmp___0)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L519] tmp___2 = __VERIFIER_nondet_int() [L521] COND TRUE \read(tmp___2) [L745] systemActive = 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L564] COND FALSE !(\read(pumpRunning)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L571] COND TRUE \read(systemActive) [L593] int tmp ; VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L596] COND TRUE ! pumpRunning [L708] int retValue_acc ; [L709] int tmp ; [L710] int tmp___0 ; [L935] int retValue_acc ; VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L938] COND FALSE !(waterLevel < 2) [L942] retValue_acc = 0 [L943] return (retValue_acc); VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L714] tmp = isHighWaterSensorDry() [L716] COND FALSE !(\read(tmp)) [L719] tmp___0 = 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L721] retValue_acc = tmp___0 [L722] return (retValue_acc); VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L598] tmp = isHighWaterLevel() [L600] COND TRUE \read(tmp) [L627] int tmp ; [L652] int retValue_acc ; [L894] int retValue_acc ; [L897] retValue_acc = methaneLevelCritical [L898] return (retValue_acc); VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L656] retValue_acc = isMethaneLevelCritical() [L658] return (retValue_acc); VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L631] tmp = isMethaneAlarm() [L633] COND FALSE !(\read(tmp)) [L621] pumpRunning = 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L46] int tmp ; [L47] int tmp___0 ; [L926] int retValue_acc ; [L929] retValue_acc = waterLevel [L930] return (retValue_acc); VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L51] tmp = getWaterLevel() [L53] COND FALSE !(tmp == 0) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L491] COND TRUE 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L493] COND TRUE splverifierCounter < 4 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L499] tmp = __VERIFIER_nondet_int() [L501] COND FALSE !(\read(tmp)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L509] tmp___0 = __VERIFIER_nondet_int() [L511] COND FALSE !(\read(tmp___0)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L519] tmp___2 = __VERIFIER_nondet_int() [L521] COND TRUE \read(tmp___2) [L745] systemActive = 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L564] COND TRUE \read(pumpRunning) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L861] COND TRUE waterLevel > 0 [L862] waterLevel = waterLevel - 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L571] COND TRUE \read(systemActive) [L593] int tmp ; VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L596] COND FALSE !(! pumpRunning) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L46] int tmp ; [L47] int tmp___0 ; [L926] int retValue_acc ; [L929] retValue_acc = waterLevel [L930] return (retValue_acc); VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L51] tmp = getWaterLevel() [L53] COND FALSE !(tmp == 0) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L491] COND TRUE 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L493] COND TRUE splverifierCounter < 4 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L499] tmp = __VERIFIER_nondet_int() [L501] COND FALSE !(\read(tmp)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L509] tmp___0 = __VERIFIER_nondet_int() [L511] COND FALSE !(\read(tmp___0)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L519] tmp___2 = __VERIFIER_nondet_int() [L521] COND TRUE \read(tmp___2) [L745] systemActive = 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L564] COND TRUE \read(pumpRunning) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L861] COND TRUE waterLevel > 0 [L862] waterLevel = waterLevel - 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L571] COND TRUE \read(systemActive) [L593] int tmp ; VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L596] COND FALSE !(! pumpRunning) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L46] int tmp ; [L47] int tmp___0 ; [L926] int retValue_acc ; [L929] retValue_acc = waterLevel [L930] return (retValue_acc); VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L51] tmp = getWaterLevel() [L53] COND TRUE tmp == 0 [L663] int retValue_acc ; [L666] retValue_acc = pumpRunning [L667] return (retValue_acc); VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L55] tmp___0 = isPumpRunning() [L57] COND TRUE \read(tmp___0) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L754] reach_error() VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] - UnprovableResult [Line: 754]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 754]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 89 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 2561.3ms, OverallIterations: 13, TraceHistogramMax: 3, EmptinessCheckTime: 19.1ms, AutomataDifference: 781.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1093 SDtfs, 1278 SDslu, 1594 SDs, 0 SdLazy, 237 SolverSat, 44 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 272.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 187.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=330occurred in iteration=10, InterpolantAutomatonStates: 63, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 179.1ms AutomataMinimizationTime, 12 MinimizatonAttempts, 1348 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 65.3ms SsaConstructionTime, 329.5ms SatisfiabilityAnalysisTime, 658.3ms InterpolantComputationTime, 481 NumberOfCodeBlocks, 481 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 405 ConstructedInterpolants, 0 QuantifiedInterpolants, 717 SizeOfPredicates, 3 NumberOfNonLiveVariables, 417 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 13 InterpolantComputations, 11 PerfectInterpolantSequences, 50/56 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! [2021-08-26 08:44:55,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...