./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d 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_1.3.100.v20150511-1540.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/forester-heap/sll-rb-sentinel-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 b39a262e58c4b59fb1c3af72226955d8a31f5200 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:46:24,470 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:46:24,473 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:46:24,498 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:46:24,498 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:46:24,499 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:46:24,501 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:46:24,503 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:46:24,505 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:46:24,506 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:46:24,507 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:46:24,508 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:46:24,509 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:46:24,510 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:46:24,511 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:46:24,512 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:46:24,513 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:46:24,514 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:46:24,517 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:46:24,519 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:46:24,531 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:46:24,534 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:46:24,537 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:46:24,541 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:46:24,549 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:46:24,549 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:46:24,550 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:46:24,551 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:46:24,553 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:46:24,554 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:46:24,556 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:46:24,559 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:46:24,560 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:46:24,562 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:46:24,565 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:46:24,565 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:46:24,566 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:46:24,566 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:46:24,566 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:46:24,567 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:46:24,568 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:46:24,570 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:46:24,618 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:46:24,618 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:46:24,621 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:46:24,621 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:46:24,621 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:46:24,622 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:46:24,622 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:46:24,622 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:46:24,622 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:46:24,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:46:24,624 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:46:24,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:46:24,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:46:24,625 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:46:24,626 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:46:24,626 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:46:24,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:46:24,627 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:46:24,627 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:46:24,627 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:46:24,628 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:46:24,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:46:24,629 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:46:24,629 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:46:24,629 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:46:24,629 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:46:24,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:46:24,630 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:46:24,630 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:46:24,630 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> b39a262e58c4b59fb1c3af72226955d8a31f5200 [2020-10-20 00:46:24,867 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:46:24,880 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:46:24,885 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:46:24,886 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:46:24,887 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:46:24,888 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i [2020-10-20 00:46:24,974 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a48ba267/9d80b2ce32a84a059cc5cd887c4c36cb/FLAGf1df880bc [2020-10-20 00:46:25,552 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:46:25,553 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i [2020-10-20 00:46:25,566 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a48ba267/9d80b2ce32a84a059cc5cd887c4c36cb/FLAGf1df880bc [2020-10-20 00:46:25,838 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a48ba267/9d80b2ce32a84a059cc5cd887c4c36cb [2020-10-20 00:46:25,842 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:46:25,849 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:46:25,851 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:46:25,851 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:46:25,855 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:46:25,856 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:46:25" (1/1) ... [2020-10-20 00:46:25,860 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77a243da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:46:25, skipping insertion in model container [2020-10-20 00:46:25,860 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:46:25" (1/1) ... [2020-10-20 00:46:25,869 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:46:25,911 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:46:26,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:46:26,347 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:46:26,433 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:46:26,499 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:46:26,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:46:26 WrapperNode [2020-10-20 00:46:26,501 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:46:26,503 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:46:26,503 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:46:26,503 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:46:26,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:46:26" (1/1) ... [2020-10-20 00:46:26,535 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:46:26" (1/1) ... [2020-10-20 00:46:26,561 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:46:26,562 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:46:26,562 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:46:26,562 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:46:26,572 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:46:26" (1/1) ... [2020-10-20 00:46:26,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:46:26" (1/1) ... [2020-10-20 00:46:26,581 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:46:26" (1/1) ... [2020-10-20 00:46:26,582 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:46:26" (1/1) ... [2020-10-20 00:46:26,602 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:46:26" (1/1) ... [2020-10-20 00:46:26,608 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:46:26" (1/1) ... [2020-10-20 00:46:26,611 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:46:26" (1/1) ... [2020-10-20 00:46:26,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:46:26,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:46:26,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:46:26,616 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:46:26,617 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:46:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:46:26,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 00:46:26,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 00:46:26,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-20 00:46:26,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-20 00:46:26,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:46:26,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-20 00:46:26,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:46:26,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:46:26,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:46:26,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:46:27,168 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:46:27,169 INFO L298 CfgBuilder]: Removed 23 assume(true) statements. [2020-10-20 00:46:27,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:46:27 BoogieIcfgContainer [2020-10-20 00:46:27,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:46:27,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:46:27,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:46:27,177 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:46:27,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:46:25" (1/3) ... [2020-10-20 00:46:27,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a1a3959 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:46:27, skipping insertion in model container [2020-10-20 00:46:27,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:46:26" (2/3) ... [2020-10-20 00:46:27,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a1a3959 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:46:27, skipping insertion in model container [2020-10-20 00:46:27,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:46:27" (3/3) ... [2020-10-20 00:46:27,182 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-rb-sentinel-2.i [2020-10-20 00:46:27,204 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:46:27,212 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-10-20 00:46:27,225 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-20 00:46:27,250 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:46:27,251 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:46:27,251 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:46:27,251 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:46:27,252 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:46:27,252 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:46:27,252 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:46:27,252 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:46:27,267 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-10-20 00:46:27,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-20 00:46:27,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:46:27,273 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:46:27,274 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:46:27,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:46:27,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1819222424, now seen corresponding path program 1 times [2020-10-20 00:46:27,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:46:27,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78072930] [2020-10-20 00:46:27,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:46:27,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:46:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:46:27,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78072930] [2020-10-20 00:46:27,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:46:27,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:46:27,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605965708] [2020-10-20 00:46:27,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:46:27,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:46:27,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:46:27,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:46:27,482 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2020-10-20 00:46:27,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:46:27,504 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2020-10-20 00:46:27,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:46:27,506 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-10-20 00:46:27,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:46:27,517 INFO L225 Difference]: With dead ends: 73 [2020-10-20 00:46:27,518 INFO L226 Difference]: Without dead ends: 31 [2020-10-20 00:46:27,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:46:27,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-20 00:46:27,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-20 00:46:27,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-20 00:46:27,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-20 00:46:27,565 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 7 [2020-10-20 00:46:27,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:46:27,566 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-20 00:46:27,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:46:27,566 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-20 00:46:27,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 00:46:27,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:46:27,568 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:46:27,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:46:27,569 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:46:27,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:46:27,569 INFO L82 PathProgramCache]: Analyzing trace with hash 177875533, now seen corresponding path program 1 times [2020-10-20 00:46:27,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:46:27,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736610260] [2020-10-20 00:46:27,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:46:27,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:46:27,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:46:27,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736610260] [2020-10-20 00:46:27,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:46:27,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:46:27,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496327588] [2020-10-20 00:46:27,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:46:27,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:46:27,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:46:27,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:46:27,751 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 4 states. [2020-10-20 00:46:27,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:46:27,820 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-10-20 00:46:27,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:46:27,820 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-20 00:46:27,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:46:27,821 INFO L225 Difference]: With dead ends: 37 [2020-10-20 00:46:27,822 INFO L226 Difference]: Without dead ends: 34 [2020-10-20 00:46:27,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:46:27,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-20 00:46:27,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2020-10-20 00:46:27,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-20 00:46:27,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-20 00:46:27,829 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 8 [2020-10-20 00:46:27,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:46:27,830 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-20 00:46:27,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:46:27,830 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-20 00:46:27,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:46:27,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:46:27,831 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:46:27,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:46:27,832 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:46:27,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:46:27,833 INFO L82 PathProgramCache]: Analyzing trace with hash -574954344, now seen corresponding path program 1 times [2020-10-20 00:46:27,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:46:27,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635706061] [2020-10-20 00:46:27,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:46:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:46:27,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:46:27,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635706061] [2020-10-20 00:46:27,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:46:27,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 00:46:27,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527172869] [2020-10-20 00:46:27,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 00:46:27,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:46:27,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 00:46:27,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:46:27,940 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2020-10-20 00:46:28,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:46:28,083 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-10-20 00:46:28,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 00:46:28,084 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-20 00:46:28,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:46:28,085 INFO L225 Difference]: With dead ends: 56 [2020-10-20 00:46:28,085 INFO L226 Difference]: Without dead ends: 53 [2020-10-20 00:46:28,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-20 00:46:28,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-20 00:46:28,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2020-10-20 00:46:28,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-20 00:46:28,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-20 00:46:28,094 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 11 [2020-10-20 00:46:28,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:46:28,095 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-20 00:46:28,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 00:46:28,096 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-20 00:46:28,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 00:46:28,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:46:28,097 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:46:28,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 00:46:28,097 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:46:28,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:46:28,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1915994638, now seen corresponding path program 1 times [2020-10-20 00:46:28,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:46:28,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524667904] [2020-10-20 00:46:28,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:46:28,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:46:28,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:46:28,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524667904] [2020-10-20 00:46:28,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457829631] [2020-10-20 00:46:28,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:46:28,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:46:28,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-20 00:46:28,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:46:28,592 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-10-20 00:46:28,593 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2020-10-20 00:46:28,593 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:46:28,607 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:46:28,614 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-10-20 00:46:28,615 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-20 00:46:28,631 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:46:28,637 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-20 00:46:28,637 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:26 [2020-10-20 00:46:28,727 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:46:28,728 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2020-10-20 00:46:28,729 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:46:28,791 INFO L625 ElimStorePlain]: treesize reduction 14, result has 80.3 percent of original size [2020-10-20 00:46:28,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:46:28,804 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-10-20 00:46:28,805 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-20 00:46:28,845 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:46:28,851 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-10-20 00:46:28,852 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-10-20 00:46:28,865 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:46:28,868 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 00:46:28,869 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:24 [2020-10-20 00:46:29,015 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:46:29,015 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2020-10-20 00:46:29,017 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:46:29,046 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:46:29,048 INFO L441 ElimStorePlain]: Different costs {2=[|v_#memory_int_28|, |v_#memory_int_29|], 4=[|v_#memory_int_31|]} [2020-10-20 00:46:29,054 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-20 00:46:29,076 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:46:29,080 INFO L545 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-20 00:46:29,113 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:46:29,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:46:29,141 INFO L350 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2020-10-20 00:46:29,142 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 45 [2020-10-20 00:46:29,144 INFO L545 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-10-20 00:46:29,161 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:46:29,176 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 3 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-10-20 00:46:29,176 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:77, output treesize:40 [2020-10-20 00:46:29,365 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2020-10-20 00:46:29,367 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:46:29,376 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:46:29,378 INFO L545 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 00:46:29,379 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:49, output treesize:3 [2020-10-20 00:46:29,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:46:29,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:46:29,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-10-20 00:46:29,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605512448] [2020-10-20 00:46:29,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-20 00:46:29,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:46:29,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 00:46:29,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-20 00:46:29,386 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 11 states. [2020-10-20 00:46:31,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:46:31,971 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2020-10-20 00:46:31,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 00:46:31,972 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-20 00:46:31,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:46:31,973 INFO L225 Difference]: With dead ends: 63 [2020-10-20 00:46:31,973 INFO L226 Difference]: Without dead ends: 60 [2020-10-20 00:46:31,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-20 00:46:31,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-20 00:46:31,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 25. [2020-10-20 00:46:31,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-20 00:46:31,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-20 00:46:31,979 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14 [2020-10-20 00:46:31,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:46:31,980 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-20 00:46:31,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-20 00:46:31,980 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-20 00:46:31,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 00:46:31,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:46:31,981 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:46:32,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:46:32,194 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:46:32,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:46:32,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1581964501, now seen corresponding path program 1 times [2020-10-20 00:46:32,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:46:32,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778073145] [2020-10-20 00:46:32,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:46:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:46:32,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:46:32,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778073145] [2020-10-20 00:46:32,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:46:32,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 00:46:32,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756782238] [2020-10-20 00:46:32,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 00:46:32,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:46:32,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 00:46:32,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:46:32,276 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-10-20 00:46:32,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:46:32,345 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-10-20 00:46:32,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 00:46:32,345 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-20 00:46:32,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:46:32,346 INFO L225 Difference]: With dead ends: 42 [2020-10-20 00:46:32,346 INFO L226 Difference]: Without dead ends: 28 [2020-10-20 00:46:32,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:46:32,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-20 00:46:32,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-20 00:46:32,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-20 00:46:32,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-20 00:46:32,351 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 15 [2020-10-20 00:46:32,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:46:32,352 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-20 00:46:32,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 00:46:32,352 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-20 00:46:32,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 00:46:32,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:46:32,353 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:46:32,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-20 00:46:32,353 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:46:32,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:46:32,354 INFO L82 PathProgramCache]: Analyzing trace with hash -105137561, now seen corresponding path program 1 times [2020-10-20 00:46:32,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:46:32,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249019367] [2020-10-20 00:46:32,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:46:32,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:46:32,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:46:32,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249019367] [2020-10-20 00:46:32,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641027579] [2020-10-20 00:46:32,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:46:32,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:46:32,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 00:46:32,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:46:32,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:46:32,589 INFO L350 Elim1Store]: treesize reduction 33, result has 55.4 percent of original size [2020-10-20 00:46:32,592 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 48 [2020-10-20 00:46:32,593 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:46:32,652 INFO L625 ElimStorePlain]: treesize reduction 16, result has 81.4 percent of original size [2020-10-20 00:46:32,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:46:32,719 INFO L350 Elim1Store]: treesize reduction 33, result has 55.4 percent of original size [2020-10-20 00:46:32,719 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 48 [2020-10-20 00:46:32,720 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-20 00:46:32,785 INFO L625 ElimStorePlain]: treesize reduction 16, result has 79.7 percent of original size [2020-10-20 00:46:32,786 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 00:46:32,787 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:63 [2020-10-20 00:46:32,878 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-10-20 00:46:32,886 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-10-20 00:46:32,904 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-10-20 00:46:32,905 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:46:32,922 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:46:32,923 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2020-10-20 00:46:32,924 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-20 00:46:32,928 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-10-20 00:46:32,929 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-10-20 00:46:32,973 INFO L625 ElimStorePlain]: treesize reduction 12, result has 84.6 percent of original size [2020-10-20 00:46:32,978 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-10-20 00:46:32,979 INFO L545 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-10-20 00:46:32,984 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-10-20 00:46:32,985 INFO L545 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-10-20 00:46:32,994 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:46:32,995 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2020-10-20 00:46:32,995 INFO L545 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2020-10-20 00:46:33,021 INFO L625 ElimStorePlain]: treesize reduction 20, result has 25.9 percent of original size [2020-10-20 00:46:33,021 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 00:46:33,021 INFO L244 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:110, output treesize:7 [2020-10-20 00:46:33,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:46:33,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:46:33,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-10-20 00:46:33,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563186937] [2020-10-20 00:46:33,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 00:46:33,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:46:33,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 00:46:33,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-20 00:46:33,038 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 8 states. [2020-10-20 00:46:33,173 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-10-20 00:46:33,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:46:33,406 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-10-20 00:46:33,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 00:46:33,407 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-10-20 00:46:33,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:46:33,408 INFO L225 Difference]: With dead ends: 53 [2020-10-20 00:46:33,408 INFO L226 Difference]: Without dead ends: 29 [2020-10-20 00:46:33,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-20 00:46:33,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-20 00:46:33,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-20 00:46:33,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-20 00:46:33,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-20 00:46:33,420 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 18 [2020-10-20 00:46:33,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:46:33,420 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-20 00:46:33,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 00:46:33,420 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-20 00:46:33,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 00:46:33,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:46:33,421 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:46:33,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:46:33,622 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:46:33,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:46:33,623 INFO L82 PathProgramCache]: Analyzing trace with hash 307103693, now seen corresponding path program 1 times [2020-10-20 00:46:33,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:46:33,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744031419] [2020-10-20 00:46:33,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:46:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:46:33,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:46:33,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744031419] [2020-10-20 00:46:33,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034568051] [2020-10-20 00:46:33,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:46:33,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:46:33,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 50 conjunts are in the unsatisfiable core [2020-10-20 00:46:33,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:46:34,002 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-10-20 00:46:34,003 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2020-10-20 00:46:34,004 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:46:34,014 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:46:34,014 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-20 00:46:34,015 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:23 [2020-10-20 00:46:34,106 INFO L350 Elim1Store]: treesize reduction 8, result has 87.3 percent of original size [2020-10-20 00:46:34,107 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 69 [2020-10-20 00:46:34,108 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:46:34,186 INFO L625 ElimStorePlain]: treesize reduction 28, result has 75.7 percent of original size [2020-10-20 00:46:34,193 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2020-10-20 00:46:34,193 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-20 00:46:34,218 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:46:34,225 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2020-10-20 00:46:34,225 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-10-20 00:46:34,266 INFO L625 ElimStorePlain]: treesize reduction 4, result has 93.4 percent of original size [2020-10-20 00:46:34,268 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 00:46:34,268 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:85, output treesize:57 [2020-10-20 00:46:34,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:46:34,474 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:46:34,475 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 49 [2020-10-20 00:46:34,476 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:46:34,561 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:46:34,566 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-20 00:46:34,619 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:46:34,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:46:34,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:46:34,630 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 43 [2020-10-20 00:46:34,631 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-10-20 00:46:34,678 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:46:34,683 INFO L545 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-20 00:46:34,719 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:46:34,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:46:34,849 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-10-20 00:46:34,850 INFO L350 Elim1Store]: treesize reduction 66, result has 62.9 percent of original size [2020-10-20 00:46:34,851 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 110 treesize of output 147 [2020-10-20 00:46:34,855 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[11, 3, 2, 1] term [2020-10-20 00:46:34,855 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 11 disjuncts [2020-10-20 00:46:34,858 INFO L545 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-10-20 00:46:34,931 INFO L625 ElimStorePlain]: treesize reduction 130, result has 41.7 percent of original size [2020-10-20 00:46:34,934 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, 4 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-20 00:46:34,936 INFO L244 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:235, output treesize:89 [2020-10-20 00:46:35,076 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 10 [2020-10-20 00:46:35,077 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:46:35,089 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:46:35,090 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-20 00:46:35,091 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:100, output treesize:74 [2020-10-20 00:46:35,799 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:46:35,799 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 61 [2020-10-20 00:46:35,801 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-10-20 00:46:35,802 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-10-20 00:46:35,802 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 00:46:35,805 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:46:35,815 INFO L625 ElimStorePlain]: treesize reduction 36, result has 20.0 percent of original size [2020-10-20 00:46:35,816 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 00:46:35,817 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:75, output treesize:4 [2020-10-20 00:46:35,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:46:35,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:46:35,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2020-10-20 00:46:35,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626564443] [2020-10-20 00:46:35,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-20 00:46:35,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:46:35,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-20 00:46:35,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=146, Unknown=1, NotChecked=0, Total=182 [2020-10-20 00:46:35,832 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 14 states. [2020-10-20 00:46:36,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:46:36,466 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2020-10-20 00:46:36,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-20 00:46:36,467 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2020-10-20 00:46:36,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:46:36,468 INFO L225 Difference]: With dead ends: 87 [2020-10-20 00:46:36,468 INFO L226 Difference]: Without dead ends: 84 [2020-10-20 00:46:36,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=66, Invalid=275, Unknown=1, NotChecked=0, Total=342 [2020-10-20 00:46:36,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-20 00:46:36,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 44. [2020-10-20 00:46:36,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-20 00:46:36,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-20 00:46:36,478 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 21 [2020-10-20 00:46:36,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:46:36,478 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-20 00:46:36,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-20 00:46:36,479 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-20 00:46:36,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 00:46:36,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:46:36,480 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:46:36,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:46:36,694 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:46:36,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:46:36,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1895451595, now seen corresponding path program 1 times [2020-10-20 00:46:36,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:46:36,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845851710] [2020-10-20 00:46:36,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:46:36,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:46:36,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:46:36,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845851710] [2020-10-20 00:46:36,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596747699] [2020-10-20 00:46:36,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:46:37,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:46:37,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-20 00:46:37,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:46:37,023 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-10-20 00:46:37,023 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2020-10-20 00:46:37,024 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:46:37,031 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:46:37,032 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-20 00:46:37,033 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:17 [2020-10-20 00:46:37,073 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:46:37,073 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-10-20 00:46:37,075 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 00:46:37,076 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:46:37,085 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:46:37,090 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2020-10-20 00:46:37,090 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-20 00:46:37,099 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:46:37,108 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2020-10-20 00:46:37,109 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-10-20 00:46:37,117 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:46:37,119 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 00:46:37,119 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:65, output treesize:19 [2020-10-20 00:46:37,144 INFO L441 ElimStorePlain]: Different costs {0=[|v_#memory_int_32|], 2=[|v_#memory_$Pointer$.base_27|, |v_#memory_$Pointer$.offset_27|]} [2020-10-20 00:46:37,148 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2020-10-20 00:46:37,148 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:46:37,158 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:46:37,180 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:46:37,181 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 124 [2020-10-20 00:46:37,182 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 3, 2, 1] term [2020-10-20 00:46:37,183 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-10-20 00:46:37,184 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-20 00:46:37,202 INFO L625 ElimStorePlain]: treesize reduction 40, result has 61.9 percent of original size [2020-10-20 00:46:37,206 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 47 [2020-10-20 00:46:37,207 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-10-20 00:46:37,212 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:46:37,212 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 00:46:37,213 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:112, output treesize:26 [2020-10-20 00:46:37,265 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2020-10-20 00:46:37,265 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:46:37,272 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:46:37,274 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2020-10-20 00:46:37,275 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-20 00:46:37,280 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:46:37,281 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 00:46:37,282 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:40, output treesize:9 [2020-10-20 00:46:37,305 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-10-20 00:46:37,306 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:46:37,308 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:46:37,308 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 00:46:37,308 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-10-20 00:46:37,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:46:37,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:46:37,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2020-10-20 00:46:37,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974236604] [2020-10-20 00:46:37,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-20 00:46:37,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:46:37,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-20 00:46:37,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-20 00:46:37,335 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 18 states. [2020-10-20 00:46:38,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:46:38,163 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2020-10-20 00:46:38,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-20 00:46:38,164 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-20 00:46:38,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:46:38,166 INFO L225 Difference]: With dead ends: 89 [2020-10-20 00:46:38,166 INFO L226 Difference]: Without dead ends: 75 [2020-10-20 00:46:38,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2020-10-20 00:46:38,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-20 00:46:38,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-10-20 00:46:38,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-20 00:46:38,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-10-20 00:46:38,177 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 21 [2020-10-20 00:46:38,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:46:38,177 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-10-20 00:46:38,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-20 00:46:38,178 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-10-20 00:46:38,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-20 00:46:38,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:46:38,179 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:46:38,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:46:38,392 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:46:38,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:46:38,393 INFO L82 PathProgramCache]: Analyzing trace with hash 970523573, now seen corresponding path program 1 times [2020-10-20 00:46:38,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:46:38,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481728432] [2020-10-20 00:46:38,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:46:38,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:46:38,451 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:46:38,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:46:38,507 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:46:38,554 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 00:46:38,554 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:46:38,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-20 00:46:38,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:46:38 BoogieIcfgContainer [2020-10-20 00:46:38,618 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:46:38,618 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:46:38,618 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:46:38,619 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:46:38,619 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:46:27" (3/4) ... [2020-10-20 00:46:38,622 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 00:46:38,705 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:46:38,705 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:46:38,707 INFO L168 Benchmark]: Toolchain (without parser) took 12863.15 ms. Allocated memory was 35.1 MB in the beginning and 90.7 MB in the end (delta: 55.6 MB). Free memory was 15.5 MB in the beginning and 61.6 MB in the end (delta: -46.0 MB). Peak memory consumption was 9.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:46:38,707 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 33.6 MB. Free memory was 10.9 MB in the beginning and 10.8 MB in the end (delta: 65.6 kB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 00:46:38,707 INFO L168 Benchmark]: CACSL2BoogieTranslator took 650.78 ms. Allocated memory was 35.1 MB in the beginning and 45.1 MB in the end (delta: 10.0 MB). Free memory was 14.7 MB in the beginning and 26.2 MB in the end (delta: -11.5 MB). Peak memory consumption was 14.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:46:38,708 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.11 ms. Allocated memory is still 45.1 MB. Free memory was 25.9 MB in the beginning and 23.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:46:38,708 INFO L168 Benchmark]: Boogie Preprocessor took 52.82 ms. Allocated memory is still 45.1 MB. Free memory was 23.8 MB in the beginning and 22.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:46:38,708 INFO L168 Benchmark]: RCFGBuilder took 556.70 ms. Allocated memory was 45.1 MB in the beginning and 45.6 MB in the end (delta: 524.3 kB). Free memory was 21.7 MB in the beginning and 10.8 MB in the end (delta: 10.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:46:38,709 INFO L168 Benchmark]: TraceAbstraction took 11444.74 ms. Allocated memory was 45.6 MB in the beginning and 90.7 MB in the end (delta: 45.1 MB). Free memory was 10.2 MB in the beginning and 65.2 MB in the end (delta: -55.0 MB). Peak memory consumption was 48.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:46:38,709 INFO L168 Benchmark]: Witness Printer took 86.93 ms. Allocated memory is still 90.7 MB. Free memory was 65.2 MB in the beginning and 61.6 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:46:38,711 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 33.6 MB. Free memory was 10.9 MB in the beginning and 10.8 MB in the end (delta: 65.6 kB). There was no memory consumed. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 650.78 ms. Allocated memory was 35.1 MB in the beginning and 45.1 MB in the end (delta: 10.0 MB). Free memory was 14.7 MB in the beginning and 26.2 MB in the end (delta: -11.5 MB). Peak memory consumption was 14.6 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 59.11 ms. Allocated memory is still 45.1 MB. Free memory was 25.9 MB in the beginning and 23.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 52.82 ms. Allocated memory is still 45.1 MB. Free memory was 23.8 MB in the beginning and 22.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. * RCFGBuilder took 556.70 ms. Allocated memory was 45.1 MB in the beginning and 45.6 MB in the end (delta: 524.3 kB). Free memory was 21.7 MB in the beginning and 10.8 MB in the end (delta: 10.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 14.3 GB. * TraceAbstraction took 11444.74 ms. Allocated memory was 45.6 MB in the beginning and 90.7 MB in the end (delta: 45.1 MB). Free memory was 10.2 MB in the beginning and 65.2 MB in the end (delta: -55.0 MB). Peak memory consumption was 48.3 MB. Max. memory is 14.3 GB. * Witness Printer took 86.93 ms. Allocated memory is still 90.7 MB. Free memory was 65.2 MB in the beginning and 61.6 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.7 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 993]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L1005] SLL* null = malloc(sizeof(SLL)); [L1006] null->colour = BLACK [L1007] null->next = ((void*)0) [L1009] SLL* list = malloc(sizeof(SLL)); [L1010] list->next = null [L1011] list->colour = BLACK [L1013] SLL* end = list; [L1016] COND TRUE __VERIFIER_nondet_int() [L1019] end->next = malloc(sizeof(SLL)) [L1020] EXPR end->next [L1020] end = end->next [L1021] end->next = null [L1023] COND FALSE !(__VERIFIER_nondet_int()) [L1029] end->colour = RED [L1030] end->next = malloc(sizeof(SLL)) [L1031] EXPR end->next [L1031] end = end->next [L1032] end->next = null [L1033] end->colour = BLACK [L1016] COND FALSE !(__VERIFIER_nondet_int()) [L1037] end = null [L1038] end = list [L1041] COND FALSE !(!(null != end)) [L1042] EXPR end->colour [L1042] COND FALSE !(!(BLACK == end->colour)) [L1044] COND TRUE null != end [L1046] EXPR end->colour [L1046] COND FALSE !(RED == end->colour) [L1053] EXPR end->next [L1053] end = end->next [L1044] COND TRUE null != end [L1046] EXPR end->colour [L1046] COND TRUE RED == end->colour [L1048] EXPR end->next [L1048] end = end->next [L1049] COND FALSE !(!(null != end)) [L1050] EXPR end->colour [L1050] COND TRUE !(BLACK != end->colour) [L993] COND FALSE !(0) [L993] __assert_fail ("0", "sll-rb-sentinel-2.c", 13, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 11.3s, OverallIterations: 9, TraceHistogramMax: 2, AutomataDifference: 4.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 226 SDtfs, 345 SDslu, 820 SDs, 0 SdLazy, 798 SolverSat, 121 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 3.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 146 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 120 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.6s InterpolantComputationTime, 213 NumberOfCodeBlocks, 213 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 177 ConstructedInterpolants, 19 QuantifiedInterpolants, 70518 SizeOfPredicates, 51 NumberOfNonLiveVariables, 470 ConjunctsInSsa, 118 ConjunctsInUnsatCore, 12 InterpolantComputations, 4 PerfectInterpolantSequences, 2/24 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...