./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/sum60-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/reducercommutativity/sum60-2.i -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 1e103c401871989cc14d279d58bbc5c5cf6c927e71f95ee371c76ee69c6b1150 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 22:42:15,082 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 22:42:15,084 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 22:42:15,148 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 22:42:15,148 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 22:42:15,152 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 22:42:15,153 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 22:42:15,156 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 22:42:15,157 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 22:42:15,161 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 22:42:15,162 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 22:42:15,163 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 22:42:15,164 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 22:42:15,166 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 22:42:15,167 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 22:42:15,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 22:42:15,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 22:42:15,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 22:42:15,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 22:42:15,180 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 22:42:15,181 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 22:42:15,182 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 22:42:15,183 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 22:42:15,184 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 22:42:15,189 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 22:42:15,190 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 22:42:15,190 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 22:42:15,195 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 22:42:15,195 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 22:42:15,196 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 22:42:15,196 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 22:42:15,197 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 22:42:15,198 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 22:42:15,199 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 22:42:15,200 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 22:42:15,200 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 22:42:15,200 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 22:42:15,200 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 22:42:15,201 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 22:42:15,201 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 22:42:15,201 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 22:42:15,202 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 22:42:15,227 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 22:42:15,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 22:42:15,227 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 22:42:15,228 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 22:42:15,228 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 22:42:15,228 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 22:42:15,229 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 22:42:15,229 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 22:42:15,229 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 22:42:15,229 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 22:42:15,230 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 22:42:15,230 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 22:42:15,230 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 22:42:15,230 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 22:42:15,230 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 22:42:15,231 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 22:42:15,231 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 22:42:15,231 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 22:42:15,231 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 22:42:15,231 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 22:42:15,231 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 22:42:15,231 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 22:42:15,232 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 22:42:15,232 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 22:42:15,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 22:42:15,232 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 22:42:15,232 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 22:42:15,232 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 22:42:15,233 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 22:42:15,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 22:42:15,233 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 22:42:15,233 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 22:42:15,233 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 22:42:15,233 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 22:42:15,233 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1e103c401871989cc14d279d58bbc5c5cf6c927e71f95ee371c76ee69c6b1150 [2021-12-16 22:42:15,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 22:42:15,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 22:42:15,463 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 22:42:15,464 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 22:42:15,464 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 22:42:15,465 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sum60-2.i [2021-12-16 22:42:15,507 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e4c3208f/6435d9345d8c4c99b3393f91bf6bfc5a/FLAG996246d05 [2021-12-16 22:42:15,837 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 22:42:15,837 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sum60-2.i [2021-12-16 22:42:15,845 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e4c3208f/6435d9345d8c4c99b3393f91bf6bfc5a/FLAG996246d05 [2021-12-16 22:42:16,281 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e4c3208f/6435d9345d8c4c99b3393f91bf6bfc5a [2021-12-16 22:42:16,282 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 22:42:16,283 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 22:42:16,284 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 22:42:16,284 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 22:42:16,289 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 22:42:16,289 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:42:16" (1/1) ... [2021-12-16 22:42:16,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63b71be2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:42:16, skipping insertion in model container [2021-12-16 22:42:16,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:42:16" (1/1) ... [2021-12-16 22:42:16,295 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 22:42:16,305 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 22:42:16,408 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/reducercommutativity/sum60-2.i[1277,1290] [2021-12-16 22:42:16,410 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 22:42:16,414 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 22:42:16,426 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/reducercommutativity/sum60-2.i[1277,1290] [2021-12-16 22:42:16,426 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 22:42:16,434 INFO L208 MainTranslator]: Completed translation [2021-12-16 22:42:16,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:42:16 WrapperNode [2021-12-16 22:42:16,434 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 22:42:16,435 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 22:42:16,435 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 22:42:16,435 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 22:42:16,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:42:16" (1/1) ... [2021-12-16 22:42:16,443 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:42:16" (1/1) ... [2021-12-16 22:42:16,452 INFO L137 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2021-12-16 22:42:16,453 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 22:42:16,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 22:42:16,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 22:42:16,454 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 22:42:16,458 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:42:16" (1/1) ... [2021-12-16 22:42:16,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:42:16" (1/1) ... [2021-12-16 22:42:16,459 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:42:16" (1/1) ... [2021-12-16 22:42:16,459 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:42:16" (1/1) ... [2021-12-16 22:42:16,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:42:16" (1/1) ... [2021-12-16 22:42:16,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:42:16" (1/1) ... [2021-12-16 22:42:16,466 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:42:16" (1/1) ... [2021-12-16 22:42:16,467 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 22:42:16,470 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 22:42:16,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 22:42:16,470 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 22:42:16,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:42:16" (1/1) ... [2021-12-16 22:42:16,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 22:42:16,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:42:16,492 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) [2021-12-16 22:42:16,497 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 [2021-12-16 22:42:16,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 22:42:16,515 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2021-12-16 22:42:16,515 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2021-12-16 22:42:16,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 22:42:16,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 22:42:16,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 22:42:16,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 22:42:16,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 22:42:16,515 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 22:42:16,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 22:42:16,556 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 22:42:16,557 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 22:42:16,723 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 22:42:16,729 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 22:42:16,743 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-16 22:42:16,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:42:16 BoogieIcfgContainer [2021-12-16 22:42:16,745 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 22:42:16,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 22:42:16,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 22:42:16,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 22:42:16,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 10:42:16" (1/3) ... [2021-12-16 22:42:16,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7277ae98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 10:42:16, skipping insertion in model container [2021-12-16 22:42:16,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:42:16" (2/3) ... [2021-12-16 22:42:16,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7277ae98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 10:42:16, skipping insertion in model container [2021-12-16 22:42:16,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:42:16" (3/3) ... [2021-12-16 22:42:16,751 INFO L111 eAbstractionObserver]: Analyzing ICFG sum60-2.i [2021-12-16 22:42:16,754 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 22:42:16,755 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 22:42:16,816 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 22:42:16,822 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 [2021-12-16 22:42:16,822 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 22:42:16,835 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:42:16,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-16 22:42:16,840 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:42:16,841 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:42:16,842 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:42:16,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:42:16,849 INFO L85 PathProgramCache]: Analyzing trace with hash -141219973, now seen corresponding path program 1 times [2021-12-16 22:42:16,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:42:16,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997526485] [2021-12-16 22:42:16,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:42:16,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:42:16,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:17,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:42:17,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:17,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 22:42:17,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:17,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:42:17,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:17,135 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 22:42:17,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:42:17,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997526485] [2021-12-16 22:42:17,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997526485] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:42:17,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123683523] [2021-12-16 22:42:17,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:42:17,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:42:17,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:42:17,165 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) [2021-12-16 22:42:17,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 22:42:17,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:17,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 22:42:17,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:42:17,338 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 22:42:17,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 22:42:17,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123683523] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:42:17,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 22:42:17,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-16 22:42:17,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058627589] [2021-12-16 22:42:17,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:42:17,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 22:42:17,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:42:17,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 22:42:17,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:42:17,369 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 22:42:17,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:42:17,392 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-12-16 22:42:17,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 22:42:17,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-12-16 22:42:17,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:42:17,401 INFO L225 Difference]: With dead ends: 50 [2021-12-16 22:42:17,401 INFO L226 Difference]: Without dead ends: 24 [2021-12-16 22:42:17,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:42:17,407 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:42:17,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:42:17,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-16 22:42:17,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-12-16 22:42:17,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:42:17,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-12-16 22:42:17,438 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2021-12-16 22:42:17,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:42:17,438 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-12-16 22:42:17,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 22:42:17,439 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-12-16 22:42:17,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-16 22:42:17,440 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:42:17,440 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:42:17,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-16 22:42:17,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-16 22:42:17,660 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:42:17,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:42:17,660 INFO L85 PathProgramCache]: Analyzing trace with hash -618478211, now seen corresponding path program 1 times [2021-12-16 22:42:17,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:42:17,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849141584] [2021-12-16 22:42:17,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:42:17,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:42:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:17,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-16 22:42:17,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:17,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 22:42:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:17,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 22:42:17,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:17,760 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 22:42:17,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:42:17,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849141584] [2021-12-16 22:42:17,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849141584] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:42:17,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832342531] [2021-12-16 22:42:17,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:42:17,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:42:17,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:42:17,763 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) [2021-12-16 22:42:17,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 22:42:17,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:17,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 22:42:17,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:42:17,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 22:42:17,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 22:42:17,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832342531] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:42:17,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 22:42:17,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-16 22:42:17,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493511883] [2021-12-16 22:42:17,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:42:17,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 22:42:17,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:42:17,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 22:42:17,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:42:17,885 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 22:42:17,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:42:17,907 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2021-12-16 22:42:17,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 22:42:17,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-12-16 22:42:17,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:42:17,909 INFO L225 Difference]: With dead ends: 42 [2021-12-16 22:42:17,909 INFO L226 Difference]: Without dead ends: 25 [2021-12-16 22:42:17,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:42:17,910 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:42:17,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:42:17,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-16 22:42:17,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-12-16 22:42:17,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:42:17,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-12-16 22:42:17,921 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2021-12-16 22:42:17,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:42:17,921 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-12-16 22:42:17,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 22:42:17,921 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-12-16 22:42:17,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-16 22:42:17,922 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:42:17,922 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:42:17,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 22:42:18,124 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,SelfDestructingSolverStorable1 [2021-12-16 22:42:18,124 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:42:18,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:42:18,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1511029509, now seen corresponding path program 1 times [2021-12-16 22:42:18,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:42:18,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645596030] [2021-12-16 22:42:18,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:42:18,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:42:18,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:18,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-16 22:42:18,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:18,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 22:42:18,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:18,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:42:18,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:18,186 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 22:42:18,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:42:18,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645596030] [2021-12-16 22:42:18,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645596030] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:42:18,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017771412] [2021-12-16 22:42:18,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:42:18,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:42:18,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:42:18,189 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) [2021-12-16 22:42:18,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 22:42:18,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:18,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 22:42:18,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:42:18,319 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-16 22:42:18,319 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 22:42:18,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017771412] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:42:18,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 22:42:18,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-16 22:42:18,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065569623] [2021-12-16 22:42:18,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:42:18,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 22:42:18,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:42:18,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 22:42:18,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 22:42:18,324 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 22:42:18,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:42:18,336 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-12-16 22:42:18,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 22:42:18,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-12-16 22:42:18,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:42:18,337 INFO L225 Difference]: With dead ends: 39 [2021-12-16 22:42:18,337 INFO L226 Difference]: Without dead ends: 26 [2021-12-16 22:42:18,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 22:42:18,339 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:42:18,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:42:18,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-16 22:42:18,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-12-16 22:42:18,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:42:18,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-12-16 22:42:18,360 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 36 [2021-12-16 22:42:18,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:42:18,361 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-12-16 22:42:18,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 22:42:18,362 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-12-16 22:42:18,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-16 22:42:18,362 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:42:18,363 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:42:18,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 22:42:18,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:42:18,563 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:42:18,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:42:18,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1553738215, now seen corresponding path program 1 times [2021-12-16 22:42:18,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:42:18,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085955224] [2021-12-16 22:42:18,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:42:18,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:42:18,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:18,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-16 22:42:18,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:18,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 22:42:18,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:18,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 22:42:18,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:18,643 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 22:42:18,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:42:18,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085955224] [2021-12-16 22:42:18,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085955224] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:42:18,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560788431] [2021-12-16 22:42:18,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:42:18,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:42:18,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:42:18,645 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) [2021-12-16 22:42:18,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 22:42:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:18,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 22:42:18,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:42:18,768 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-16 22:42:18,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:42:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-16 22:42:18,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560788431] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:42:18,826 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:42:18,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2021-12-16 22:42:18,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224601891] [2021-12-16 22:42:18,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:42:18,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 22:42:18,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:42:18,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 22:42:18,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-16 22:42:18,828 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-16 22:42:18,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:42:18,857 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2021-12-16 22:42:18,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 22:42:18,858 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 38 [2021-12-16 22:42:18,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:42:18,859 INFO L225 Difference]: With dead ends: 54 [2021-12-16 22:42:18,859 INFO L226 Difference]: Without dead ends: 34 [2021-12-16 22:42:18,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-16 22:42:18,860 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:42:18,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 102 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:42:18,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-16 22:42:18,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-12-16 22:42:18,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:42:18,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-12-16 22:42:18,864 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 38 [2021-12-16 22:42:18,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:42:18,864 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-12-16 22:42:18,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-16 22:42:18,864 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-12-16 22:42:18,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-16 22:42:18,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:42:18,865 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:42:18,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 22:42:19,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:42:19,079 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:42:19,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:42:19,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1124150243, now seen corresponding path program 2 times [2021-12-16 22:42:19,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:42:19,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814382966] [2021-12-16 22:42:19,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:42:19,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:42:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:19,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-16 22:42:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:19,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 22:42:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:19,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 22:42:19,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:19,147 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-16 22:42:19,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:42:19,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814382966] [2021-12-16 22:42:19,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814382966] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:42:19,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740681122] [2021-12-16 22:42:19,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:42:19,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:42:19,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:42:19,150 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) [2021-12-16 22:42:19,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 22:42:19,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:42:19,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:42:19,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 22:42:19,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:42:19,316 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-16 22:42:19,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:42:19,439 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-16 22:42:19,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740681122] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:42:19,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:42:19,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2021-12-16 22:42:19,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103401846] [2021-12-16 22:42:19,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:42:19,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 22:42:19,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:42:19,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 22:42:19,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-16 22:42:19,442 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 22:42:19,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:42:19,480 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2021-12-16 22:42:19,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 22:42:19,481 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2021-12-16 22:42:19,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:42:19,482 INFO L225 Difference]: With dead ends: 70 [2021-12-16 22:42:19,482 INFO L226 Difference]: Without dead ends: 48 [2021-12-16 22:42:19,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-16 22:42:19,483 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:42:19,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 80 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:42:19,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-16 22:42:19,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-12-16 22:42:19,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:42:19,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-12-16 22:42:19,500 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 50 [2021-12-16 22:42:19,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:42:19,500 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-12-16 22:42:19,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 22:42:19,501 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-12-16 22:42:19,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-16 22:42:19,501 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:42:19,501 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:42:19,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 22:42:19,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:42:19,715 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:42:19,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:42:19,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1238744391, now seen corresponding path program 3 times [2021-12-16 22:42:19,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:42:19,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323032511] [2021-12-16 22:42:19,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:42:19,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:42:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:19,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 22:42:19,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:19,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-16 22:42:19,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:19,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 22:42:19,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:19,871 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-16 22:42:19,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:42:19,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323032511] [2021-12-16 22:42:19,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323032511] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:42:19,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741694392] [2021-12-16 22:42:19,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:42:19,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:42:19,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:42:19,874 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) [2021-12-16 22:42:19,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 22:42:19,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-16 22:42:19,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:42:19,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 22:42:19,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:42:20,008 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-16 22:42:20,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:42:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-16 22:42:20,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741694392] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:42:20,084 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:42:20,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2021-12-16 22:42:20,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108013380] [2021-12-16 22:42:20,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:42:20,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 22:42:20,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:42:20,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 22:42:20,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-12-16 22:42:20,087 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 22:42:20,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:42:20,133 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2021-12-16 22:42:20,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 22:42:20,133 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 64 [2021-12-16 22:42:20,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:42:20,135 INFO L225 Difference]: With dead ends: 82 [2021-12-16 22:42:20,135 INFO L226 Difference]: Without dead ends: 58 [2021-12-16 22:42:20,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-12-16 22:42:20,138 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:42:20,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 102 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:42:20,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-16 22:42:20,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-12-16 22:42:20,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:42:20,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2021-12-16 22:42:20,150 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 64 [2021-12-16 22:42:20,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:42:20,150 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2021-12-16 22:42:20,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 22:42:20,151 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2021-12-16 22:42:20,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-16 22:42:20,153 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:42:20,153 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:42:20,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 22:42:20,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:42:20,371 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:42:20,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:42:20,371 INFO L85 PathProgramCache]: Analyzing trace with hash 85970241, now seen corresponding path program 4 times [2021-12-16 22:42:20,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:42:20,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235975377] [2021-12-16 22:42:20,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:42:20,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:42:20,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:20,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:42:20,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:20,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-16 22:42:20,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:20,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 22:42:20,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-12-16 22:42:20,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:42:20,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235975377] [2021-12-16 22:42:20,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235975377] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:42:20,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692895576] [2021-12-16 22:42:20,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:42:20,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:42:20,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:42:20,487 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) [2021-12-16 22:42:20,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 22:42:20,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:42:20,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:42:20,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 22:42:20,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:42:20,666 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 178 proven. 4 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2021-12-16 22:42:20,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:42:20,760 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-12-16 22:42:20,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692895576] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:42:20,761 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:42:20,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2021-12-16 22:42:20,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038494411] [2021-12-16 22:42:20,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:42:20,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 22:42:20,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:42:20,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 22:42:20,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-12-16 22:42:20,763 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 22:42:20,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:42:20,808 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2021-12-16 22:42:20,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-16 22:42:20,809 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 90 [2021-12-16 22:42:20,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:42:20,809 INFO L225 Difference]: With dead ends: 100 [2021-12-16 22:42:20,809 INFO L226 Difference]: Without dead ends: 68 [2021-12-16 22:42:20,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-12-16 22:42:20,810 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:42:20,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 81 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:42:20,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-16 22:42:20,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-12-16 22:42:20,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:42:20,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2021-12-16 22:42:20,815 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 90 [2021-12-16 22:42:20,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:42:20,815 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2021-12-16 22:42:20,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 22:42:20,815 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2021-12-16 22:42:20,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-16 22:42:20,816 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:42:20,816 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 12, 12, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:42:20,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 22:42:21,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:42:21,028 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:42:21,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:42:21,028 INFO L85 PathProgramCache]: Analyzing trace with hash 2002416443, now seen corresponding path program 5 times [2021-12-16 22:42:21,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:42:21,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570040351] [2021-12-16 22:42:21,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:42:21,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:42:21,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:21,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 22:42:21,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:21,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 22:42:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:21,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-16 22:42:21,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:21,167 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2021-12-16 22:42:21,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:42:21,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570040351] [2021-12-16 22:42:21,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570040351] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:42:21,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056424908] [2021-12-16 22:42:21,168 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:42:21,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:42:21,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:42:21,184 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) [2021-12-16 22:42:21,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 22:42:21,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-12-16 22:42:21,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:42:21,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 22:42:21,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:42:21,877 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2021-12-16 22:42:21,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:42:22,065 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2021-12-16 22:42:22,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056424908] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:42:22,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:42:22,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2021-12-16 22:42:22,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715703297] [2021-12-16 22:42:22,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:42:22,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-16 22:42:22,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:42:22,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-16 22:42:22,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2021-12-16 22:42:22,067 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 22:42:22,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:42:22,147 INFO L93 Difference]: Finished difference Result 126 states and 145 transitions. [2021-12-16 22:42:22,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-16 22:42:22,147 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 100 [2021-12-16 22:42:22,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:42:22,148 INFO L225 Difference]: With dead ends: 126 [2021-12-16 22:42:22,148 INFO L226 Difference]: Without dead ends: 86 [2021-12-16 22:42:22,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2021-12-16 22:42:22,149 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 27 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:42:22,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 142 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:42:22,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-16 22:42:22,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-12-16 22:42:22,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:42:22,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2021-12-16 22:42:22,154 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 100 [2021-12-16 22:42:22,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:42:22,154 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2021-12-16 22:42:22,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 22:42:22,154 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2021-12-16 22:42:22,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-16 22:42:22,160 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:42:22,160 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 13, 13, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:42:22,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-16 22:42:22,375 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,SelfDestructingSolverStorable7 [2021-12-16 22:42:22,376 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:42:22,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:42:22,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1921824045, now seen corresponding path program 6 times [2021-12-16 22:42:22,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:42:22,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717718473] [2021-12-16 22:42:22,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:42:22,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:42:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:22,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 22:42:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:22,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-16 22:42:22,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:22,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-16 22:42:22,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:22,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2021-12-16 22:42:22,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:42:22,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717718473] [2021-12-16 22:42:22,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717718473] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:42:22,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265305704] [2021-12-16 22:42:22,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:42:22,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:42:22,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:42:22,535 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) [2021-12-16 22:42:22,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 22:42:22,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-12-16 22:42:22,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:42:22,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 22:42:22,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:42:22,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 850 proven. 36 refuted. 0 times theorem prover too weak. 1182 trivial. 0 not checked. [2021-12-16 22:42:22,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:42:23,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2032 trivial. 0 not checked. [2021-12-16 22:42:23,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265305704] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:42:23,178 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:42:23,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2021-12-16 22:42:23,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56347417] [2021-12-16 22:42:23,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:42:23,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-16 22:42:23,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:42:23,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-16 22:42:23,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2021-12-16 22:42:23,180 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 22:42:23,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:42:23,237 INFO L93 Difference]: Finished difference Result 160 states and 176 transitions. [2021-12-16 22:42:23,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-16 22:42:23,238 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 150 [2021-12-16 22:42:23,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:42:23,240 INFO L225 Difference]: With dead ends: 160 [2021-12-16 22:42:23,240 INFO L226 Difference]: Without dead ends: 104 [2021-12-16 22:42:23,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2021-12-16 22:42:23,244 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:42:23,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 120 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:42:23,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-16 22:42:23,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-12-16 22:42:23,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:42:23,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2021-12-16 22:42:23,255 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 150 [2021-12-16 22:42:23,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:42:23,255 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2021-12-16 22:42:23,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 22:42:23,255 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2021-12-16 22:42:23,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-16 22:42:23,256 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:42:23,256 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 14, 14, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:42:23,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 22:42:23,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:42:23,457 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:42:23,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:42:23,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1322781599, now seen corresponding path program 7 times [2021-12-16 22:42:23,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:42:23,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210269766] [2021-12-16 22:42:23,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:42:23,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:42:23,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:23,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-16 22:42:23,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:23,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-16 22:42:23,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:23,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-16 22:42:23,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:23,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2021-12-16 22:42:23,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:42:23,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210269766] [2021-12-16 22:42:23,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210269766] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:42:23,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476431907] [2021-12-16 22:42:23,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:42:23,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:42:23,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:42:23,649 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) [2021-12-16 22:42:23,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 22:42:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:23,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 22:42:23,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:42:23,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2021-12-16 22:42:23,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:42:24,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2021-12-16 22:42:24,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476431907] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:42:24,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:42:24,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2021-12-16 22:42:24,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040104589] [2021-12-16 22:42:24,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:42:24,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 22:42:24,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:42:24,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 22:42:24,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 22:42:24,360 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-16 22:42:24,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:42:24,421 INFO L93 Difference]: Finished difference Result 207 states and 230 transitions. [2021-12-16 22:42:24,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-16 22:42:24,421 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 168 [2021-12-16 22:42:24,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:42:24,422 INFO L225 Difference]: With dead ends: 207 [2021-12-16 22:42:24,422 INFO L226 Difference]: Without dead ends: 135 [2021-12-16 22:42:24,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 22:42:24,423 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:42:24,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 112 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:42:24,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-16 22:42:24,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-12-16 22:42:24,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.023076923076923) internal successors, (133), 130 states have internal predecessors, (133), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:42:24,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2021-12-16 22:42:24,429 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 168 [2021-12-16 22:42:24,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:42:24,429 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2021-12-16 22:42:24,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-16 22:42:24,429 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2021-12-16 22:42:24,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-12-16 22:42:24,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:42:24,431 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 30, 30, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:42:24,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 22:42:24,643 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,SelfDestructingSolverStorable9 [2021-12-16 22:42:24,643 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:42:24,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:42:24,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1725939777, now seen corresponding path program 8 times [2021-12-16 22:42:24,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:42:24,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733208005] [2021-12-16 22:42:24,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:42:24,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:42:24,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:25,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 22:42:25,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:25,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-16 22:42:25,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:25,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-16 22:42:25,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:25,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2021-12-16 22:42:25,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:42:25,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733208005] [2021-12-16 22:42:25,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733208005] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:42:25,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974803239] [2021-12-16 22:42:25,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:42:25,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:42:25,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:42:25,088 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) [2021-12-16 22:42:25,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 22:42:25,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:42:25,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:42:25,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-16 22:42:25,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:42:25,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2021-12-16 22:42:25,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:42:26,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2021-12-16 22:42:26,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974803239] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:42:26,535 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:42:26,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 63 [2021-12-16 22:42:26,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552046070] [2021-12-16 22:42:26,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:42:26,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-16 22:42:26,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:42:26,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-16 22:42:26,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-12-16 22:42:26,538 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand has 63 states, 63 states have (on average 2.3333333333333335) internal successors, (147), 63 states have internal predecessors, (147), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-16 22:42:26,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:42:26,644 INFO L93 Difference]: Finished difference Result 267 states and 304 transitions. [2021-12-16 22:42:26,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-16 22:42:26,644 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.3333333333333335) internal successors, (147), 63 states have internal predecessors, (147), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 200 [2021-12-16 22:42:26,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:42:26,645 INFO L225 Difference]: With dead ends: 267 [2021-12-16 22:42:26,645 INFO L226 Difference]: Without dead ends: 195 [2021-12-16 22:42:26,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 375 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-12-16 22:42:26,647 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 60 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:42:26,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 178 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:42:26,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-12-16 22:42:26,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-12-16 22:42:26,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.0157894736842106) internal successors, (193), 190 states have internal predecessors, (193), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:42:26,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 199 transitions. [2021-12-16 22:42:26,653 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 199 transitions. Word has length 200 [2021-12-16 22:42:26,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:42:26,653 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 199 transitions. [2021-12-16 22:42:26,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.3333333333333335) internal successors, (147), 63 states have internal predecessors, (147), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-16 22:42:26,653 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 199 transitions. [2021-12-16 22:42:26,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-12-16 22:42:26,655 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:42:26,655 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 42, 42, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:42:26,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 22:42:26,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-16 22:42:26,875 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:42:26,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:42:26,876 INFO L85 PathProgramCache]: Analyzing trace with hash -966879109, now seen corresponding path program 9 times [2021-12-16 22:42:26,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:42:26,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762148910] [2021-12-16 22:42:26,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:42:26,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:42:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:26,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-16 22:42:26,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:27,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-12-16 22:42:27,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:27,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2021-12-16 22:42:27,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5659 backedges. 0 proven. 1044 refuted. 0 times theorem prover too weak. 4615 trivial. 0 not checked. [2021-12-16 22:42:27,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:42:27,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762148910] [2021-12-16 22:42:27,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762148910] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:42:27,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122979924] [2021-12-16 22:42:27,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:42:27,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:42:27,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:42:27,124 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:42:27,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 22:42:29,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-12-16 22:42:29,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:42:29,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 22:42:29,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:42:29,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5659 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4615 trivial. 0 not checked. [2021-12-16 22:42:29,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:42:30,408 INFO L134 CoverageAnalysis]: Checked inductivity of 5659 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4615 trivial. 0 not checked. [2021-12-16 22:42:30,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122979924] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:42:30,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:42:30,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2021-12-16 22:42:30,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194649647] [2021-12-16 22:42:30,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:42:30,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-16 22:42:30,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:42:30,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-16 22:42:30,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-12-16 22:42:30,410 INFO L87 Difference]: Start difference. First operand 195 states and 199 transitions. Second operand has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 22:42:30,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:42:30,478 INFO L93 Difference]: Finished difference Result 298 states and 323 transitions. [2021-12-16 22:42:30,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-16 22:42:30,479 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 260 [2021-12-16 22:42:30,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:42:30,483 INFO L225 Difference]: With dead ends: 298 [2021-12-16 22:42:30,483 INFO L226 Difference]: Without dead ends: 227 [2021-12-16 22:42:30,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 511 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-12-16 22:42:30,484 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 45 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:42:30,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 112 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:42:30,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-12-16 22:42:30,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2021-12-16 22:42:30,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.0135135135135136) internal successors, (225), 222 states have internal predecessors, (225), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:42:30,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 231 transitions. [2021-12-16 22:42:30,490 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 231 transitions. Word has length 260 [2021-12-16 22:42:30,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:42:30,490 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 231 transitions. [2021-12-16 22:42:30,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 22:42:30,491 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 231 transitions. [2021-12-16 22:42:30,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-12-16 22:42:30,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:42:30,493 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 60, 60, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:42:30,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 22:42:30,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-16 22:42:30,707 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:42:30,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:42:30,708 INFO L85 PathProgramCache]: Analyzing trace with hash -624378789, now seen corresponding path program 10 times [2021-12-16 22:42:30,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:42:30,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752591148] [2021-12-16 22:42:30,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:42:30,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:42:30,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:30,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-16 22:42:30,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:31,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2021-12-16 22:42:31,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:31,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 287 [2021-12-16 22:42:31,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:31,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12091 backedges. 0 proven. 4628 refuted. 0 times theorem prover too weak. 7463 trivial. 0 not checked. [2021-12-16 22:42:31,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:42:31,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752591148] [2021-12-16 22:42:31,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752591148] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:42:31,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146486306] [2021-12-16 22:42:31,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:42:31,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:42:31,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:42:31,224 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:42:31,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 22:42:31,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:42:31,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:42:31,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 1215 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 22:42:31,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:42:32,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12091 backedges. 3730 proven. 196 refuted. 0 times theorem prover too weak. 8165 trivial. 0 not checked. [2021-12-16 22:42:32,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:42:32,651 INFO L134 CoverageAnalysis]: Checked inductivity of 12091 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 11895 trivial. 0 not checked. [2021-12-16 22:42:32,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146486306] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:42:32,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:42:32,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 17, 17] total 63 [2021-12-16 22:42:32,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550613409] [2021-12-16 22:42:32,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:42:32,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-16 22:42:32,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:42:32,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-16 22:42:32,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1023, Invalid=2883, Unknown=0, NotChecked=0, Total=3906 [2021-12-16 22:42:32,654 INFO L87 Difference]: Start difference. First operand 227 states and 231 transitions. Second operand has 63 states, 63 states have (on average 2.365079365079365) internal successors, (149), 63 states have internal predecessors, (149), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 22:42:32,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:42:32,801 INFO L93 Difference]: Finished difference Result 365 states and 391 transitions. [2021-12-16 22:42:32,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-16 22:42:32,801 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.365079365079365) internal successors, (149), 63 states have internal predecessors, (149), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 356 [2021-12-16 22:42:32,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:42:32,803 INFO L225 Difference]: With dead ends: 365 [2021-12-16 22:42:32,803 INFO L226 Difference]: Without dead ends: 262 [2021-12-16 22:42:32,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 749 GetRequests, 688 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1023, Invalid=2883, Unknown=0, NotChecked=0, Total=3906 [2021-12-16 22:42:32,805 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 76 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:42:32,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 140 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:42:32,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-12-16 22:42:32,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 261. [2021-12-16 22:42:32,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 256 states have (on average 1.01171875) internal successors, (259), 256 states have internal predecessors, (259), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:42:32,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 265 transitions. [2021-12-16 22:42:32,810 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 265 transitions. Word has length 356 [2021-12-16 22:42:32,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:42:32,810 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 265 transitions. [2021-12-16 22:42:32,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.365079365079365) internal successors, (149), 63 states have internal predecessors, (149), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 22:42:32,811 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 265 transitions. [2021-12-16 22:42:32,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2021-12-16 22:42:32,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:42:32,814 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 60, 60, 30, 30, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:42:32,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-16 22:42:33,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-16 22:42:33,023 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:42:33,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:42:33,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1346460359, now seen corresponding path program 11 times [2021-12-16 22:42:33,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:42:33,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700571850] [2021-12-16 22:42:33,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:42:33,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:42:33,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:33,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-16 22:42:33,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:33,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2021-12-16 22:42:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:33,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 323 [2021-12-16 22:42:33,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:42:33,499 INFO L134 CoverageAnalysis]: Checked inductivity of 13350 backedges. 0 proven. 4937 refuted. 0 times theorem prover too weak. 8413 trivial. 0 not checked. [2021-12-16 22:42:33,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:42:33,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700571850] [2021-12-16 22:42:33,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700571850] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:42:33,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726455811] [2021-12-16 22:42:33,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:42:33,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:42:33,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:42:33,501 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:42:33,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process Killed by 15