./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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/loops-crafted-1/mono-crafted_6.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 a0e1e4b700be1f29c3e51242b4a74b80feb10d65ba6788a48a42ab27b5c7017d --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 10:55:58,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 10:55:58,163 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 10:55:58,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 10:55:58,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 10:55:58,207 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 10:55:58,208 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 10:55:58,210 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 10:55:58,211 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 10:55:58,212 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 10:55:58,213 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 10:55:58,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 10:55:58,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 10:55:58,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 10:55:58,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 10:55:58,226 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 10:55:58,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 10:55:58,233 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 10:55:58,235 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 10:55:58,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 10:55:58,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 10:55:58,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 10:55:58,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 10:55:58,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 10:55:58,248 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 10:55:58,250 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 10:55:58,251 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 10:55:58,251 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 10:55:58,252 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 10:55:58,253 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 10:55:58,253 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 10:55:58,254 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 10:55:58,256 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 10:55:58,257 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 10:55:58,258 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 10:55:58,258 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 10:55:58,258 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 10:55:58,259 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 10:55:58,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 10:55:58,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 10:55:58,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 10:55:58,261 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 10:55:58,290 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 10:55:58,290 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 10:55:58,291 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 10:55:58,291 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 10:55:58,292 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 10:55:58,292 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 10:55:58,292 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 10:55:58,293 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 10:55:58,293 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 10:55:58,293 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 10:55:58,294 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 10:55:58,294 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 10:55:58,294 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 10:55:58,294 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 10:55:58,294 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 10:55:58,295 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 10:55:58,295 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 10:55:58,295 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 10:55:58,295 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 10:55:58,295 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 10:55:58,295 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 10:55:58,296 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 10:55:58,296 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 10:55:58,296 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 10:55:58,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:55:58,296 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 10:55:58,297 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 10:55:58,297 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 10:55:58,297 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 10:55:58,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 10:55:58,297 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 10:55:58,297 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 10:55:58,298 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 10:55:58,298 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 10:55:58,298 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0e1e4b700be1f29c3e51242b4a74b80feb10d65ba6788a48a42ab27b5c7017d [2021-12-15 10:55:58,510 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 10:55:58,535 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 10:55:58,537 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 10:55:58,538 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 10:55:58,538 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 10:55:58,539 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c [2021-12-15 10:55:58,593 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aada4d64c/33273fc8e4a64f049733f3c53c54ff5a/FLAG3719c8976 [2021-12-15 10:55:58,983 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 10:55:58,983 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c [2021-12-15 10:55:58,988 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aada4d64c/33273fc8e4a64f049733f3c53c54ff5a/FLAG3719c8976 [2021-12-15 10:55:59,393 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aada4d64c/33273fc8e4a64f049733f3c53c54ff5a [2021-12-15 10:55:59,395 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 10:55:59,396 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 10:55:59,398 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 10:55:59,398 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 10:55:59,404 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 10:55:59,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:55:59" (1/1) ... [2021-12-15 10:55:59,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37b7555c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:55:59, skipping insertion in model container [2021-12-15 10:55:59,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:55:59" (1/1) ... [2021-12-15 10:55:59,412 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 10:55:59,423 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 10:55:59,569 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c[318,331] [2021-12-15 10:55:59,580 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:55:59,589 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 10:55:59,606 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c[318,331] [2021-12-15 10:55:59,610 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:55:59,621 INFO L208 MainTranslator]: Completed translation [2021-12-15 10:55:59,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:55:59 WrapperNode [2021-12-15 10:55:59,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 10:55:59,623 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 10:55:59,623 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 10:55:59,624 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 10:55:59,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:55:59" (1/1) ... [2021-12-15 10:55:59,636 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:55:59" (1/1) ... [2021-12-15 10:55:59,650 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2021-12-15 10:55:59,651 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 10:55:59,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 10:55:59,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 10:55:59,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 10:55:59,658 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:55:59" (1/1) ... [2021-12-15 10:55:59,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:55:59" (1/1) ... [2021-12-15 10:55:59,660 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:55:59" (1/1) ... [2021-12-15 10:55:59,660 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:55:59" (1/1) ... [2021-12-15 10:55:59,663 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:55:59" (1/1) ... [2021-12-15 10:55:59,667 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:55:59" (1/1) ... [2021-12-15 10:55:59,670 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:55:59" (1/1) ... [2021-12-15 10:55:59,671 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 10:55:59,672 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 10:55:59,673 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 10:55:59,673 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 10:55:59,674 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:55:59" (1/1) ... [2021-12-15 10:55:59,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:55:59,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:55:59,707 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) [2021-12-15 10:55:59,713 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 [2021-12-15 10:55:59,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 10:55:59,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 10:55:59,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 10:55:59,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 10:55:59,781 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 10:55:59,783 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 10:55:59,913 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 10:55:59,918 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 10:55:59,923 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 10:55:59,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:55:59 BoogieIcfgContainer [2021-12-15 10:55:59,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 10:55:59,926 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 10:55:59,927 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 10:55:59,930 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 10:55:59,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:55:59" (1/3) ... [2021-12-15 10:55:59,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@436b1539 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:55:59, skipping insertion in model container [2021-12-15 10:55:59,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:55:59" (2/3) ... [2021-12-15 10:55:59,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@436b1539 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:55:59, skipping insertion in model container [2021-12-15 10:55:59,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:55:59" (3/3) ... [2021-12-15 10:55:59,934 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_6.c [2021-12-15 10:55:59,938 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 10:55:59,938 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 10:55:59,988 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 10:55:59,995 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 10:55:59,996 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 10:56:00,010 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 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) [2021-12-15 10:56:00,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 10:56:00,025 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:56:00,026 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 10:56:00,027 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:56:00,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:56:00,031 INFO L85 PathProgramCache]: Analyzing trace with hash 889646744, now seen corresponding path program 1 times [2021-12-15 10:56:00,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:56:00,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205008744] [2021-12-15 10:56:00,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:56:00,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:56:00,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:56:00,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:56:00,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:56:00,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205008744] [2021-12-15 10:56:00,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205008744] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:56:00,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:56:00,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:56:00,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446276317] [2021-12-15 10:56:00,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:56:00,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:56:00,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:56:00,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:56:00,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:56:00,277 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 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 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-12-15 10:56:00,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:56:00,327 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2021-12-15 10:56:00,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:56:00,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2021-12-15 10:56:00,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:56:00,337 INFO L225 Difference]: With dead ends: 28 [2021-12-15 10:56:00,337 INFO L226 Difference]: Without dead ends: 12 [2021-12-15 10:56:00,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:56:00,346 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:56:00,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 22 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:56:00,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-12-15 10:56:00,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-12-15 10:56:00,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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) [2021-12-15 10:56:00,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-12-15 10:56:00,380 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 6 [2021-12-15 10:56:00,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:56:00,380 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-12-15 10:56:00,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-12-15 10:56:00,381 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-12-15 10:56:00,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-15 10:56:00,382 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:56:00,382 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:56:00,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 10:56:00,383 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:56:00,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:56:00,384 INFO L85 PathProgramCache]: Analyzing trace with hash 295698875, now seen corresponding path program 1 times [2021-12-15 10:56:00,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:56:00,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958635491] [2021-12-15 10:56:00,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:56:00,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:56:00,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:56:00,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:56:00,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:56:00,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958635491] [2021-12-15 10:56:00,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958635491] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:56:00,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671959869] [2021-12-15 10:56:00,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:56:00,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:00,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:56:00,456 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) [2021-12-15 10:56:00,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 10:56:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:56:00,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 10:56:00,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:56:00,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:56:00,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:56:00,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:56:00,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671959869] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:56:00,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:56:00,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-15 10:56:00,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641312670] [2021-12-15 10:56:00,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:56:00,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 10:56:00,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:56:00,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 10:56:00,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-15 10:56:00,606 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2021-12-15 10:56:00,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:56:00,656 INFO L93 Difference]: Finished difference Result 26 states and 35 transitions. [2021-12-15 10:56:00,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 10:56:00,657 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 8 [2021-12-15 10:56:00,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:56:00,659 INFO L225 Difference]: With dead ends: 26 [2021-12-15 10:56:00,659 INFO L226 Difference]: Without dead ends: 18 [2021-12-15 10:56:00,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-15 10:56:00,662 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:56:00,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:56:00,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-15 10:56:00,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2021-12-15 10:56:00,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 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) [2021-12-15 10:56:00,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-12-15 10:56:00,672 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2021-12-15 10:56:00,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:56:00,672 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-12-15 10:56:00,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2021-12-15 10:56:00,678 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-12-15 10:56:00,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-15 10:56:00,680 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:56:00,680 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:56:00,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 10:56:00,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:00,895 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:56:00,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:56:00,896 INFO L85 PathProgramCache]: Analyzing trace with hash 890916581, now seen corresponding path program 1 times [2021-12-15 10:56:00,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:56:00,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237106354] [2021-12-15 10:56:00,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:56:00,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:56:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:56:00,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 10:56:00,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:56:00,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237106354] [2021-12-15 10:56:00,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237106354] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:56:00,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:56:00,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:56:00,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697332880] [2021-12-15 10:56:00,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:56:00,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:56:00,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:56:00,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:56:00,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:56:00,923 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2021-12-15 10:56:00,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:56:00,940 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2021-12-15 10:56:00,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:56:00,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 14 [2021-12-15 10:56:00,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:56:00,941 INFO L225 Difference]: With dead ends: 29 [2021-12-15 10:56:00,941 INFO L226 Difference]: Without dead ends: 19 [2021-12-15 10:56:00,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:56:00,943 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:56:00,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:56:00,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-15 10:56:00,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-12-15 10:56:00,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 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) [2021-12-15 10:56:00,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-12-15 10:56:00,947 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2021-12-15 10:56:00,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:56:00,948 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-12-15 10:56:00,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2021-12-15 10:56:00,948 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-12-15 10:56:00,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-15 10:56:00,949 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:56:00,949 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:56:00,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 10:56:00,949 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:56:00,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:56:00,950 INFO L85 PathProgramCache]: Analyzing trace with hash -894818322, now seen corresponding path program 1 times [2021-12-15 10:56:00,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:56:00,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184247103] [2021-12-15 10:56:00,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:56:00,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:56:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:56:01,005 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 10:56:01,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:56:01,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184247103] [2021-12-15 10:56:01,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184247103] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:56:01,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710634646] [2021-12-15 10:56:01,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:56:01,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:01,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:56:01,007 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:56:01,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 10:56:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:56:01,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 10:56:01,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:56:01,109 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 10:56:01,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:56:01,178 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 10:56:01,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710634646] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:56:01,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:56:01,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-12-15 10:56:01,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361829631] [2021-12-15 10:56:01,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:56:01,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 10:56:01,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:56:01,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 10:56:01,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-12-15 10:56:01,189 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:56:01,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:56:01,225 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-12-15 10:56:01,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 10:56:01,225 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-15 10:56:01,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:56:01,226 INFO L225 Difference]: With dead ends: 40 [2021-12-15 10:56:01,226 INFO L226 Difference]: Without dead ends: 27 [2021-12-15 10:56:01,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-12-15 10:56:01,227 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:56:01,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:56:01,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-15 10:56:01,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-15 10:56:01,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 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) [2021-12-15 10:56:01,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-12-15 10:56:01,232 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2021-12-15 10:56:01,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:56:01,232 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-12-15 10:56:01,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:56:01,233 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-12-15 10:56:01,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-15 10:56:01,233 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:56:01,234 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:56:01,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 10:56:01,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-15 10:56:01,457 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:56:01,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:56:01,457 INFO L85 PathProgramCache]: Analyzing trace with hash 118887930, now seen corresponding path program 2 times [2021-12-15 10:56:01,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:56:01,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067192227] [2021-12-15 10:56:01,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:56:01,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:56:01,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:56:01,534 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 10:56:01,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:56:01,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067192227] [2021-12-15 10:56:01,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067192227] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:56:01,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029439460] [2021-12-15 10:56:01,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 10:56:01,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:01,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:56:01,540 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:56:01,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 10:56:01,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 10:56:01,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:56:01,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 10:56:01,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:56:01,628 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 10:56:01,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:56:01,744 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 10:56:01,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029439460] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:56:01,744 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:56:01,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2021-12-15 10:56:01,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029108654] [2021-12-15 10:56:01,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:56:01,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-15 10:56:01,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:56:01,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-15 10:56:01,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-12-15 10:56:01,746 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 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) [2021-12-15 10:56:01,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:56:01,798 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2021-12-15 10:56:01,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-15 10:56:01,799 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 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 [2021-12-15 10:56:01,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:56:01,800 INFO L225 Difference]: With dead ends: 56 [2021-12-15 10:56:01,800 INFO L226 Difference]: Without dead ends: 43 [2021-12-15 10:56:01,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-12-15 10:56:01,801 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:56:01,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:56:01,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-15 10:56:01,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-15 10:56:01,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 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) [2021-12-15 10:56:01,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-12-15 10:56:01,806 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 26 [2021-12-15 10:56:01,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:56:01,807 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-12-15 10:56:01,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 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) [2021-12-15 10:56:01,807 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-12-15 10:56:01,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-15 10:56:01,808 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:56:01,808 INFO L514 BasicCegarLoop]: trace histogram [16, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:56:01,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 10:56:02,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:02,031 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:56:02,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:56:02,031 INFO L85 PathProgramCache]: Analyzing trace with hash -173044206, now seen corresponding path program 3 times [2021-12-15 10:56:02,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:56:02,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311855690] [2021-12-15 10:56:02,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:56:02,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:56:02,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:56:02,259 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 10:56:02,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:56:02,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311855690] [2021-12-15 10:56:02,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311855690] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:56:02,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21821148] [2021-12-15 10:56:02,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 10:56:02,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:02,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:56:02,268 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:56:02,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 10:56:02,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-15 10:56:02,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:56:02,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-15 10:56:02,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:56:02,395 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-12-15 10:56:02,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:56:02,553 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-12-15 10:56:02,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21821148] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:56:02,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:56:02,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 4, 6] total 23 [2021-12-15 10:56:02,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685689503] [2021-12-15 10:56:02,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:56:02,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-15 10:56:02,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:56:02,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-15 10:56:02,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2021-12-15 10:56:02,556 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 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) [2021-12-15 10:56:02,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:56:02,658 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2021-12-15 10:56:02,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-15 10:56:02,659 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 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 42 [2021-12-15 10:56:02,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:56:02,660 INFO L225 Difference]: With dead ends: 72 [2021-12-15 10:56:02,660 INFO L226 Difference]: Without dead ends: 57 [2021-12-15 10:56:02,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=220, Invalid=332, Unknown=0, NotChecked=0, Total=552 [2021-12-15 10:56:02,661 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 44 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:56:02,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 27 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:56:02,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-15 10:56:02,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-15 10:56:02,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 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) [2021-12-15 10:56:02,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2021-12-15 10:56:02,667 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 42 [2021-12-15 10:56:02,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:56:02,668 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2021-12-15 10:56:02,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 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) [2021-12-15 10:56:02,668 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2021-12-15 10:56:02,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-15 10:56:02,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:56:02,669 INFO L514 BasicCegarLoop]: trace histogram [20, 15, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:56:02,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 10:56:02,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:02,887 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:56:02,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:56:02,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1187818742, now seen corresponding path program 4 times [2021-12-15 10:56:02,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:56:02,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482774347] [2021-12-15 10:56:02,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:56:02,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:56:02,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:56:03,095 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-15 10:56:03,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:56:03,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482774347] [2021-12-15 10:56:03,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482774347] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:56:03,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551416356] [2021-12-15 10:56:03,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 10:56:03,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:03,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:56:03,098 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:56:03,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 10:56:03,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 10:56:03,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:56:03,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-15 10:56:03,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:56:03,260 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-15 10:56:03,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:56:03,716 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-15 10:56:03,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551416356] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:56:03,717 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:56:03,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2021-12-15 10:56:03,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313384807] [2021-12-15 10:56:03,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:56:03,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-15 10:56:03,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:56:03,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-15 10:56:03,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-12-15 10:56:03,719 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:56:03,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:56:03,831 INFO L93 Difference]: Finished difference Result 116 states and 151 transitions. [2021-12-15 10:56:03,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-15 10:56:03,832 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-15 10:56:03,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:56:03,835 INFO L225 Difference]: With dead ends: 116 [2021-12-15 10:56:03,835 INFO L226 Difference]: Without dead ends: 91 [2021-12-15 10:56:03,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-12-15 10:56:03,837 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:56:03,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:56:03,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-15 10:56:03,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-12-15 10:56:03,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1111111111111112) internal successors, (100), 90 states have internal predecessors, (100), 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) [2021-12-15 10:56:03,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2021-12-15 10:56:03,861 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 56 [2021-12-15 10:56:03,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:56:03,863 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2021-12-15 10:56:03,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:56:03,863 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2021-12-15 10:56:03,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-15 10:56:03,868 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:56:03,868 INFO L514 BasicCegarLoop]: trace histogram [37, 32, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:56:03,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 10:56:04,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:04,076 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:56:04,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:56:04,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1855342691, now seen corresponding path program 5 times [2021-12-15 10:56:04,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:56:04,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297019965] [2021-12-15 10:56:04,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:56:04,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:56:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:56:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1389 backedges. 297 proven. 1056 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-15 10:56:04,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:56:04,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297019965] [2021-12-15 10:56:04,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297019965] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:56:04,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313126721] [2021-12-15 10:56:04,712 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 10:56:04,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:04,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:56:04,716 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:56:04,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 10:56:04,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2021-12-15 10:56:04,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:56:04,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-15 10:56:04,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:56:05,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1389 backedges. 818 proven. 211 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2021-12-15 10:56:05,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:56:06,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1389 backedges. 818 proven. 211 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2021-12-15 10:56:06,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313126721] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:56:06,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:56:06,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 17, 17] total 65 [2021-12-15 10:56:06,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976198901] [2021-12-15 10:56:06,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:56:06,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-15 10:56:06,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:56:06,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-15 10:56:06,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-12-15 10:56:06,581 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 states have internal predecessors, (148), 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) [2021-12-15 10:56:06,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:56:06,894 INFO L93 Difference]: Finished difference Result 234 states and 311 transitions. [2021-12-15 10:56:06,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-15 10:56:06,895 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 states have internal predecessors, (148), 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 90 [2021-12-15 10:56:06,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:56:06,897 INFO L225 Difference]: With dead ends: 234 [2021-12-15 10:56:06,897 INFO L226 Difference]: Without dead ends: 209 [2021-12-15 10:56:06,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-12-15 10:56:06,899 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 126 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:56:06,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 66 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 10:56:06,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-12-15 10:56:06,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2021-12-15 10:56:06,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.1875) internal successors, (247), 208 states have internal predecessors, (247), 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) [2021-12-15 10:56:06,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 247 transitions. [2021-12-15 10:56:06,920 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 247 transitions. Word has length 90 [2021-12-15 10:56:06,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:56:06,922 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 247 transitions. [2021-12-15 10:56:06,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 states have internal predecessors, (148), 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) [2021-12-15 10:56:06,922 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 247 transitions. [2021-12-15 10:56:06,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-12-15 10:56:06,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:56:06,929 INFO L514 BasicCegarLoop]: trace histogram [67, 34, 34, 33, 30, 4, 1, 1, 1, 1, 1, 1] [2021-12-15 10:56:06,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 10:56:07,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:07,144 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:56:07,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:56:07,145 INFO L85 PathProgramCache]: Analyzing trace with hash 960421829, now seen corresponding path program 6 times [2021-12-15 10:56:07,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:56:07,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640497434] [2021-12-15 10:56:07,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:56:07,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:56:07,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:56:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5611 backedges. 2278 proven. 1122 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2021-12-15 10:56:07,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:56:07,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640497434] [2021-12-15 10:56:07,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640497434] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:56:07,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129948548] [2021-12-15 10:56:07,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 10:56:07,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:07,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:56:07,742 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:56:07,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 10:56:07,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-12-15 10:56:07,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:56:07,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-15 10:56:07,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:56:08,212 INFO L134 CoverageAnalysis]: Checked inductivity of 5611 backedges. 832 proven. 32 refuted. 0 times theorem prover too weak. 4747 trivial. 0 not checked. [2021-12-15 10:56:08,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:56:08,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5611 backedges. 832 proven. 32 refuted. 0 times theorem prover too weak. 4747 trivial. 0 not checked. [2021-12-15 10:56:08,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129948548] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:56:08,663 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:56:08,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 7, 9] total 48 [2021-12-15 10:56:08,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678889363] [2021-12-15 10:56:08,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:56:08,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-15 10:56:08,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:56:08,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-15 10:56:08,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2021-12-15 10:56:08,666 INFO L87 Difference]: Start difference. First operand 209 states and 247 transitions. Second operand has 48 states, 48 states have (on average 2.6041666666666665) internal successors, (125), 48 states have internal predecessors, (125), 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) [2021-12-15 10:56:08,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:56:08,891 INFO L93 Difference]: Finished difference Result 378 states and 473 transitions. [2021-12-15 10:56:08,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-15 10:56:08,892 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.6041666666666665) internal successors, (125), 48 states have internal predecessors, (125), 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 208 [2021-12-15 10:56:08,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:56:08,893 INFO L225 Difference]: With dead ends: 378 [2021-12-15 10:56:08,893 INFO L226 Difference]: Without dead ends: 235 [2021-12-15 10:56:08,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1045, Invalid=1307, Unknown=0, NotChecked=0, Total=2352 [2021-12-15 10:56:08,895 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 101 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:56:08,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 37 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 10:56:08,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-12-15 10:56:08,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2021-12-15 10:56:08,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.2179487179487178) internal successors, (285), 234 states have internal predecessors, (285), 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) [2021-12-15 10:56:08,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 285 transitions. [2021-12-15 10:56:08,903 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 285 transitions. Word has length 208 [2021-12-15 10:56:08,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:56:08,903 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 285 transitions. [2021-12-15 10:56:08,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.6041666666666665) internal successors, (125), 48 states have internal predecessors, (125), 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) [2021-12-15 10:56:08,904 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 285 transitions. [2021-12-15 10:56:08,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-12-15 10:56:08,906 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:56:08,906 INFO L514 BasicCegarLoop]: trace histogram [74, 40, 40, 34, 30, 10, 1, 1, 1, 1, 1, 1] [2021-12-15 10:56:08,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 10:56:09,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:09,120 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:56:09,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:56:09,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1401661778, now seen corresponding path program 7 times [2021-12-15 10:56:09,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:56:09,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721801548] [2021-12-15 10:56:09,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:56:09,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:56:09,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:56:09,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7036 backedges. 2765 proven. 1190 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-12-15 10:56:09,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:56:09,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721801548] [2021-12-15 10:56:09,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721801548] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:56:09,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742770605] [2021-12-15 10:56:09,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 10:56:09,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:09,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:56:09,783 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:56:09,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 10:56:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:56:09,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-15 10:56:09,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:56:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7036 backedges. 2765 proven. 1190 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-12-15 10:56:10,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:56:12,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7036 backedges. 2765 proven. 1190 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-12-15 10:56:12,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742770605] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:56:12,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:56:12,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 73 [2021-12-15 10:56:12,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897103341] [2021-12-15 10:56:12,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:56:12,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-12-15 10:56:12,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:56:12,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-12-15 10:56:12,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-12-15 10:56:12,177 INFO L87 Difference]: Start difference. First operand 235 states and 285 transitions. Second operand has 73 states, 73 states have (on average 2.1232876712328768) internal successors, (155), 73 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) [2021-12-15 10:56:12,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:56:12,420 INFO L93 Difference]: Finished difference Result 472 states and 608 transitions. [2021-12-15 10:56:12,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-15 10:56:12,420 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.1232876712328768) internal successors, (155), 73 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) Word has length 234 [2021-12-15 10:56:12,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:56:12,424 INFO L225 Difference]: With dead ends: 472 [2021-12-15 10:56:12,424 INFO L226 Difference]: Without dead ends: 307 [2021-12-15 10:56:12,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-12-15 10:56:12,427 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:56:12,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 10:56:12,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-12-15 10:56:12,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2021-12-15 10:56:12,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.1666666666666667) internal successors, (357), 306 states have internal predecessors, (357), 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) [2021-12-15 10:56:12,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 357 transitions. [2021-12-15 10:56:12,437 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 357 transitions. Word has length 234 [2021-12-15 10:56:12,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:56:12,437 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 357 transitions. [2021-12-15 10:56:12,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.1232876712328768) internal successors, (155), 73 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) [2021-12-15 10:56:12,438 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 357 transitions. [2021-12-15 10:56:12,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-12-15 10:56:12,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:56:12,441 INFO L514 BasicCegarLoop]: trace histogram [110, 70, 40, 40, 30, 10, 1, 1, 1, 1, 1, 1] [2021-12-15 10:56:12,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 10:56:12,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-15 10:56:12,658 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:56:12,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:56:12,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1256502206, now seen corresponding path program 8 times [2021-12-15 10:56:12,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:56:12,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662106107] [2021-12-15 10:56:12,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:56:12,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:56:12,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:56:14,462 INFO L134 CoverageAnalysis]: Checked inductivity of 13660 backedges. 5609 proven. 4970 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-12-15 10:56:14,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:56:14,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662106107] [2021-12-15 10:56:14,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662106107] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:56:14,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030484356] [2021-12-15 10:56:14,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 10:56:14,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:14,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:56:14,470 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:56:14,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 10:56:14,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 10:56:14,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:56:14,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-15 10:56:14,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:56:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 13660 backedges. 5609 proven. 4970 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-12-15 10:56:15,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:56:20,320 INFO L134 CoverageAnalysis]: Checked inductivity of 13660 backedges. 5609 proven. 4970 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-12-15 10:56:20,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030484356] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:56:20,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:56:20,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 145 [2021-12-15 10:56:20,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154727174] [2021-12-15 10:56:20,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:56:20,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2021-12-15 10:56:20,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:56:20,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2021-12-15 10:56:20,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2021-12-15 10:56:20,326 INFO L87 Difference]: Start difference. First operand 307 states and 357 transitions. Second operand has 145 states, 145 states have (on average 2.0620689655172413) internal successors, (299), 145 states have internal predecessors, (299), 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) [2021-12-15 10:56:20,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:56:20,729 INFO L93 Difference]: Finished difference Result 616 states and 788 transitions. [2021-12-15 10:56:20,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-12-15 10:56:20,729 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 2.0620689655172413) internal successors, (299), 145 states have internal predecessors, (299), 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 306 [2021-12-15 10:56:20,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:56:20,731 INFO L225 Difference]: With dead ends: 616 [2021-12-15 10:56:20,731 INFO L226 Difference]: Without dead ends: 451 [2021-12-15 10:56:20,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 540 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2021-12-15 10:56:20,735 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 10:56:20,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 10:56:20,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-12-15 10:56:20,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 451. [2021-12-15 10:56:20,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.1133333333333333) internal successors, (501), 450 states have internal predecessors, (501), 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) [2021-12-15 10:56:20,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 501 transitions. [2021-12-15 10:56:20,747 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 501 transitions. Word has length 306 [2021-12-15 10:56:20,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:56:20,747 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 501 transitions. [2021-12-15 10:56:20,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 2.0620689655172413) internal successors, (299), 145 states have internal predecessors, (299), 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) [2021-12-15 10:56:20,748 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 501 transitions. [2021-12-15 10:56:20,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2021-12-15 10:56:20,753 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:56:20,754 INFO L514 BasicCegarLoop]: trace histogram [182, 142, 40, 40, 30, 10, 1, 1, 1, 1, 1, 1] [2021-12-15 10:56:20,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-15 10:56:20,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:20,963 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:56:20,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:56:20,964 INFO L85 PathProgramCache]: Analyzing trace with hash -932895594, now seen corresponding path program 9 times [2021-12-15 10:56:20,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:56:20,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651920961] [2021-12-15 10:56:20,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:56:20,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:56:21,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:56:27,519 INFO L134 CoverageAnalysis]: Checked inductivity of 34684 backedges. 11297 proven. 20306 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-12-15 10:56:27,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:56:27,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651920961] [2021-12-15 10:56:27,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651920961] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:56:27,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696035684] [2021-12-15 10:56:27,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 10:56:27,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:27,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:56:27,528 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:56:27,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-15 10:56:27,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-12-15 10:56:27,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:56:27,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-15 10:56:27,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:56:29,131 INFO L134 CoverageAnalysis]: Checked inductivity of 34684 backedges. 4231 proven. 200 refuted. 0 times theorem prover too weak. 30253 trivial. 0 not checked. [2021-12-15 10:56:29,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:56:30,704 INFO L134 CoverageAnalysis]: Checked inductivity of 34684 backedges. 4231 proven. 200 refuted. 0 times theorem prover too weak. 30253 trivial. 0 not checked. [2021-12-15 10:56:30,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696035684] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:56:30,705 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:56:30,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [145, 13, 13] total 167 [2021-12-15 10:56:30,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606382070] [2021-12-15 10:56:30,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:56:30,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2021-12-15 10:56:30,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:56:30,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2021-12-15 10:56:30,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2021-12-15 10:56:30,711 INFO L87 Difference]: Start difference. First operand 451 states and 501 transitions. Second operand has 167 states, 167 states have (on average 2.3293413173652695) internal successors, (389), 167 states have internal predecessors, (389), 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) [2021-12-15 10:56:31,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:56:31,617 INFO L93 Difference]: Finished difference Result 666 states and 803 transitions. [2021-12-15 10:56:31,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-12-15 10:56:31,617 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 167 states have (on average 2.3293413173652695) internal successors, (389), 167 states have internal predecessors, (389), 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 450 [2021-12-15 10:56:31,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:56:31,620 INFO L225 Difference]: With dead ends: 666 [2021-12-15 10:56:31,620 INFO L226 Difference]: Without dead ends: 501 [2021-12-15 10:56:31,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1043 GetRequests, 878 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2021-12-15 10:56:31,622 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 187 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 745 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 745 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 10:56:31,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 44 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [745 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 10:56:31,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-12-15 10:56:31,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 501. [2021-12-15 10:56:31,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 1.15) internal successors, (575), 500 states have internal predecessors, (575), 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) [2021-12-15 10:56:31,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 575 transitions. [2021-12-15 10:56:31,634 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 575 transitions. Word has length 450 [2021-12-15 10:56:31,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:56:31,635 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 575 transitions. [2021-12-15 10:56:31,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 167 states, 167 states have (on average 2.3293413173652695) internal successors, (389), 167 states have internal predecessors, (389), 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) [2021-12-15 10:56:31,635 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 575 transitions. [2021-12-15 10:56:31,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2021-12-15 10:56:31,641 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:56:31,642 INFO L514 BasicCegarLoop]: trace histogram [195, 143, 52, 52, 30, 22, 1, 1, 1, 1, 1, 1] [2021-12-15 10:56:31,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-15 10:56:31,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-15 10:56:31,855 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:56:31,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:56:31,855 INFO L85 PathProgramCache]: Analyzing trace with hash -278359667, now seen corresponding path program 10 times [2021-12-15 10:56:31,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:56:31,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778865559] [2021-12-15 10:56:31,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:56:31,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:56:31,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:56:38,431 INFO L134 CoverageAnalysis]: Checked inductivity of 40677 backedges. 14832 proven. 20592 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2021-12-15 10:56:38,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:56:38,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778865559] [2021-12-15 10:56:38,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778865559] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:56:38,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183201871] [2021-12-15 10:56:38,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 10:56:38,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:56:38,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:56:38,437 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:56:38,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-15 10:56:38,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 10:56:38,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:56:38,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 145 conjunts are in the unsatisfiable core [2021-12-15 10:56:38,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:56:39,312 INFO L134 CoverageAnalysis]: Checked inductivity of 40677 backedges. 14832 proven. 20592 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2021-12-15 10:56:39,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:56:58,665 INFO L134 CoverageAnalysis]: Checked inductivity of 40677 backedges. 14832 proven. 20592 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2021-12-15 10:56:58,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183201871] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:56:58,666 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:56:58,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [146, 146, 146] total 291 [2021-12-15 10:56:58,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216464263] [2021-12-15 10:56:58,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:56:58,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 291 states [2021-12-15 10:56:58,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:56:58,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 291 interpolants. [2021-12-15 10:56:58,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42195, Invalid=42195, Unknown=0, NotChecked=0, Total=84390 [2021-12-15 10:56:58,688 INFO L87 Difference]: Start difference. First operand 501 states and 575 transitions. Second operand has 291 states, 291 states have (on average 2.0309278350515463) internal successors, (591), 291 states have internal predecessors, (591), 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)