./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/sum01_bug02.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30f4e4ab Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -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/loops/sum01_bug02.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(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c5465a084053aead702161d951dd339bfa1665d5 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 0.1.24-30f4e4a [2019-11-27 23:59:42,643 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-27 23:59:42,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-27 23:59:42,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-27 23:59:42,664 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-27 23:59:42,666 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-27 23:59:42,667 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-27 23:59:42,679 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-27 23:59:42,682 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-27 23:59:42,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-27 23:59:42,684 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-27 23:59:42,685 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-27 23:59:42,686 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-27 23:59:42,687 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-27 23:59:42,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-27 23:59:42,689 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-27 23:59:42,690 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-27 23:59:42,691 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-27 23:59:42,692 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-27 23:59:42,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-27 23:59:42,696 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-27 23:59:42,697 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-27 23:59:42,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-27 23:59:42,699 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-27 23:59:42,701 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-27 23:59:42,702 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-27 23:59:42,702 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-27 23:59:42,703 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-27 23:59:42,703 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-27 23:59:42,704 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-27 23:59:42,705 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-27 23:59:42,705 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-27 23:59:42,706 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-27 23:59:42,707 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-27 23:59:42,708 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-27 23:59:42,708 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-27 23:59:42,709 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-27 23:59:42,709 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-27 23:59:42,710 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-27 23:59:42,711 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-27 23:59:42,712 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-27 23:59:42,712 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-27 23:59:42,728 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-27 23:59:42,728 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-27 23:59:42,729 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-27 23:59:42,730 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-27 23:59:42,730 INFO L138 SettingsManager]: * Use SBE=true [2019-11-27 23:59:42,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-27 23:59:42,730 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-27 23:59:42,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-27 23:59:42,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-27 23:59:42,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-27 23:59:42,732 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-27 23:59:42,732 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-27 23:59:42,732 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-27 23:59:42,732 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-27 23:59:42,733 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-27 23:59:42,733 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-27 23:59:42,733 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-27 23:59:42,734 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-27 23:59:42,734 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-27 23:59:42,734 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-27 23:59:42,734 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-27 23:59:42,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-27 23:59:42,735 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-27 23:59:42,735 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-27 23:59:42,736 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-27 23:59:42,736 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-27 23:59:42,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-27 23:59:42,737 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-27 23:59:42,737 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(__VERIFIER_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 -> c5465a084053aead702161d951dd339bfa1665d5 [2019-11-27 23:59:43,022 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-27 23:59:43,034 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-27 23:59:43,038 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-27 23:59:43,039 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-27 23:59:43,040 INFO L275 PluginConnector]: CDTParser initialized [2019-11-27 23:59:43,040 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/sum01_bug02.i [2019-11-27 23:59:43,116 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21bcb3967/30559850378041e2979c56c8f4a85b64/FLAGf4de18fdf [2019-11-27 23:59:43,546 INFO L306 CDTParser]: Found 1 translation units. [2019-11-27 23:59:43,547 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/sum01_bug02.i [2019-11-27 23:59:43,553 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21bcb3967/30559850378041e2979c56c8f4a85b64/FLAGf4de18fdf [2019-11-27 23:59:43,923 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21bcb3967/30559850378041e2979c56c8f4a85b64 [2019-11-27 23:59:43,926 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-27 23:59:43,927 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-27 23:59:43,928 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-27 23:59:43,928 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-27 23:59:43,932 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-27 23:59:43,933 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:59:43" (1/1) ... [2019-11-27 23:59:43,936 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@164a7f7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:43, skipping insertion in model container [2019-11-27 23:59:43,936 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:59:43" (1/1) ... [2019-11-27 23:59:43,943 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-27 23:59:43,959 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-27 23:59:44,112 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 23:59:44,117 INFO L203 MainTranslator]: Completed pre-run [2019-11-27 23:59:44,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 23:59:44,150 INFO L208 MainTranslator]: Completed translation [2019-11-27 23:59:44,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:44 WrapperNode [2019-11-27 23:59:44,151 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-27 23:59:44,151 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-27 23:59:44,151 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-27 23:59:44,152 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-27 23:59:44,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:44" (1/1) ... [2019-11-27 23:59:44,162 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:44" (1/1) ... [2019-11-27 23:59:44,178 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-27 23:59:44,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-27 23:59:44,179 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-27 23:59:44,179 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-27 23:59:44,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:44" (1/1) ... [2019-11-27 23:59:44,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:44" (1/1) ... [2019-11-27 23:59:44,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:44" (1/1) ... [2019-11-27 23:59:44,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:44" (1/1) ... [2019-11-27 23:59:44,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:44" (1/1) ... [2019-11-27 23:59:44,247 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:44" (1/1) ... [2019-11-27 23:59:44,248 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:44" (1/1) ... [2019-11-27 23:59:44,249 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-27 23:59:44,250 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-27 23:59:44,250 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-27 23:59:44,250 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-27 23:59:44,251 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:44" (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 [2019-11-27 23:59:44,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-27 23:59:44,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-27 23:59:44,481 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-27 23:59:44,482 INFO L297 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-27 23:59:44,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:59:44 BoogieIcfgContainer [2019-11-27 23:59:44,484 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-27 23:59:44,485 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-27 23:59:44,485 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-27 23:59:44,487 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-27 23:59:44,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:59:43" (1/3) ... [2019-11-27 23:59:44,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36454427 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:59:44, skipping insertion in model container [2019-11-27 23:59:44,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:59:44" (2/3) ... [2019-11-27 23:59:44,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36454427 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:59:44, skipping insertion in model container [2019-11-27 23:59:44,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:59:44" (3/3) ... [2019-11-27 23:59:44,492 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2019-11-27 23:59:44,502 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-27 23:59:44,508 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-27 23:59:44,520 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-27 23:59:44,551 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-27 23:59:44,551 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-27 23:59:44,551 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-27 23:59:44,551 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-27 23:59:44,552 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-27 23:59:44,552 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-27 23:59:44,552 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-27 23:59:44,552 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-27 23:59:44,563 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-11-27 23:59:44,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-27 23:59:44,567 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:59:44,568 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-27 23:59:44,568 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:59:44,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:59:44,573 INFO L82 PathProgramCache]: Analyzing trace with hash 30170436, now seen corresponding path program 1 times [2019-11-27 23:59:44,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:59:44,581 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986379046] [2019-11-27 23:59:44,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:59:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:59:44,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:59:44,698 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986379046] [2019-11-27 23:59:44,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:59:44,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-27 23:59:44,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501745613] [2019-11-27 23:59:44,705 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-27 23:59:44,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:59:44,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-27 23:59:44,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-27 23:59:44,722 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2019-11-27 23:59:44,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:59:44,739 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2019-11-27 23:59:44,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-27 23:59:44,741 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-11-27 23:59:44,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:59:44,749 INFO L225 Difference]: With dead ends: 19 [2019-11-27 23:59:44,749 INFO L226 Difference]: Without dead ends: 9 [2019-11-27 23:59:44,752 INFO L630 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 [2019-11-27 23:59:44,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-27 23:59:44,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-27 23:59:44,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-27 23:59:44,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-11-27 23:59:44,786 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 5 [2019-11-27 23:59:44,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:59:44,787 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-11-27 23:59:44,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-27 23:59:44,787 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-11-27 23:59:44,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-27 23:59:44,788 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:59:44,788 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-27 23:59:44,789 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:59:44,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:59:44,789 INFO L82 PathProgramCache]: Analyzing trace with hash 29783153, now seen corresponding path program 1 times [2019-11-27 23:59:44,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:59:44,790 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441193276] [2019-11-27 23:59:44,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:59:44,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:59:44,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:59:44,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441193276] [2019-11-27 23:59:44,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:59:44,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-27 23:59:44,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093329833] [2019-11-27 23:59:44,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-27 23:59:44,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:59:44,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-27 23:59:44,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-27 23:59:44,868 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2019-11-27 23:59:44,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:59:44,924 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2019-11-27 23:59:44,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-27 23:59:44,925 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-11-27 23:59:44,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:59:44,926 INFO L225 Difference]: With dead ends: 17 [2019-11-27 23:59:44,926 INFO L226 Difference]: Without dead ends: 13 [2019-11-27 23:59:44,927 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-27 23:59:44,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-27 23:59:44,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-27 23:59:44,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-27 23:59:44,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-11-27 23:59:44,932 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 5 [2019-11-27 23:59:44,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:59:44,932 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-11-27 23:59:44,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-27 23:59:44,933 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-11-27 23:59:44,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-27 23:59:44,934 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:59:44,934 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:59:44,934 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:59:44,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:59:44,935 INFO L82 PathProgramCache]: Analyzing trace with hash -963514282, now seen corresponding path program 1 times [2019-11-27 23:59:44,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:59:44,935 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846170] [2019-11-27 23:59:44,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:59:44,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:59:45,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:59:45,230 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846170] [2019-11-27 23:59:45,230 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813292981] [2019-11-27 23:59:45,230 INFO L94 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 [2019-11-27 23:59:45,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:59:45,264 WARN L253 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-27 23:59:45,270 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:59:45,429 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-27 23:59:45,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:59:45,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 23:59:45,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2019-11-27 23:59:45,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384981842] [2019-11-27 23:59:45,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-27 23:59:45,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:59:45,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-27 23:59:45,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-11-27 23:59:45,458 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 14 states. [2019-11-27 23:59:45,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:59:45,760 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-11-27 23:59:45,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-27 23:59:45,762 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 9 [2019-11-27 23:59:45,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:59:45,764 INFO L225 Difference]: With dead ends: 35 [2019-11-27 23:59:45,765 INFO L226 Difference]: Without dead ends: 29 [2019-11-27 23:59:45,766 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2019-11-27 23:59:45,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-27 23:59:45,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2019-11-27 23:59:45,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-27 23:59:45,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-11-27 23:59:45,773 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 9 [2019-11-27 23:59:45,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:59:45,774 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-11-27 23:59:45,774 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-27 23:59:45,775 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-11-27 23:59:45,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-27 23:59:45,775 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:59:45,776 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:59:45,980 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:59:45,980 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:59:45,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:59:45,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1771006013, now seen corresponding path program 1 times [2019-11-27 23:59:45,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:59:45,982 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336856483] [2019-11-27 23:59:45,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:59:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:59:46,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:59:46,038 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336856483] [2019-11-27 23:59:46,038 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296679684] [2019-11-27 23:59:46,038 INFO L94 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 [2019-11-27 23:59:46,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:59:46,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-27 23:59:46,063 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:59:46,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:59:46,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 23:59:46,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2019-11-27 23:59:46,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46022999] [2019-11-27 23:59:46,109 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-27 23:59:46,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:59:46,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-27 23:59:46,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2019-11-27 23:59:46,110 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 8 states. [2019-11-27 23:59:46,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:59:46,158 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2019-11-27 23:59:46,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-27 23:59:46,159 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-11-27 23:59:46,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:59:46,160 INFO L225 Difference]: With dead ends: 30 [2019-11-27 23:59:46,160 INFO L226 Difference]: Without dead ends: 18 [2019-11-27 23:59:46,160 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2019-11-27 23:59:46,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-27 23:59:46,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-27 23:59:46,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-27 23:59:46,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-11-27 23:59:46,169 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2019-11-27 23:59:46,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:59:46,169 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-11-27 23:59:46,169 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-27 23:59:46,170 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-11-27 23:59:46,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-27 23:59:46,170 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:59:46,170 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1] [2019-11-27 23:59:46,372 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:59:46,373 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:59:46,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:59:46,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1276819616, now seen corresponding path program 2 times [2019-11-27 23:59:46,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:59:46,374 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052008168] [2019-11-27 23:59:46,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:59:46,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:59:46,596 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-27 23:59:46,597 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052008168] [2019-11-27 23:59:46,597 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527828500] [2019-11-27 23:59:46,597 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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) [2019-11-27 23:59:46,637 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-27 23:59:46,638 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:59:46,640 WARN L253 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-27 23:59:46,642 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:59:46,828 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-27 23:59:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:59:46,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 23:59:46,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 18 [2019-11-27 23:59:46,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981868774] [2019-11-27 23:59:46,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-27 23:59:46,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:59:46,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-27 23:59:46,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2019-11-27 23:59:46,855 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 19 states. [2019-11-27 23:59:47,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:59:47,445 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2019-11-27 23:59:47,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-27 23:59:47,446 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 17 [2019-11-27 23:59:47,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:59:47,447 INFO L225 Difference]: With dead ends: 39 [2019-11-27 23:59:47,447 INFO L226 Difference]: Without dead ends: 33 [2019-11-27 23:59:47,449 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2019-11-27 23:59:47,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-27 23:59:47,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 19. [2019-11-27 23:59:47,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-27 23:59:47,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-11-27 23:59:47,454 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 17 [2019-11-27 23:59:47,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:59:47,454 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-11-27 23:59:47,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-27 23:59:47,455 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-11-27 23:59:47,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-27 23:59:47,456 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:59:47,456 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2019-11-27 23:59:47,658 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:59:47,659 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:59:47,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:59:47,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1243140318, now seen corresponding path program 2 times [2019-11-27 23:59:47,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:59:47,660 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797216253] [2019-11-27 23:59:47,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:59:47,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:59:47,708 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:59:47,708 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797216253] [2019-11-27 23:59:47,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757751611] [2019-11-27 23:59:47,709 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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) [2019-11-27 23:59:47,737 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-27 23:59:47,738 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 23:59:47,738 INFO L255 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-27 23:59:47,740 INFO L278 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:59:47,799 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:59:47,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 23:59:47,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2019-11-27 23:59:47,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175496605] [2019-11-27 23:59:47,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-27 23:59:47,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:59:47,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-27 23:59:47,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2019-11-27 23:59:47,801 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 12 states. [2019-11-27 23:59:47,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:59:47,854 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-11-27 23:59:47,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-27 23:59:47,854 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-11-27 23:59:47,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:59:47,855 INFO L225 Difference]: With dead ends: 32 [2019-11-27 23:59:47,856 INFO L226 Difference]: Without dead ends: 24 [2019-11-27 23:59:47,856 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2019-11-27 23:59:47,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-27 23:59:47,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-11-27 23:59:47,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-27 23:59:47,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-11-27 23:59:47,861 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2019-11-27 23:59:47,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:59:47,862 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-11-27 23:59:47,862 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-27 23:59:47,862 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-11-27 23:59:47,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-27 23:59:47,863 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:59:47,863 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2019-11-27 23:59:48,067 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:59:48,068 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:59:48,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:59:48,069 INFO L82 PathProgramCache]: Analyzing trace with hash -242812025, now seen corresponding path program 3 times [2019-11-27 23:59:48,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:59:48,070 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393268863] [2019-11-27 23:59:48,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:59:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:59:48,173 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:59:48,173 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393268863] [2019-11-27 23:59:48,174 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34008842] [2019-11-27 23:59:48,174 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:59:48,200 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-27 23:59:48,200 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 23:59:48,201 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-27 23:59:48,203 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:59:48,306 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:59:48,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 23:59:48,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2019-11-27 23:59:48,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352225827] [2019-11-27 23:59:48,308 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-27 23:59:48,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:59:48,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-27 23:59:48,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2019-11-27 23:59:48,309 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 16 states. [2019-11-27 23:59:48,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:59:48,383 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2019-11-27 23:59:48,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-27 23:59:48,384 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2019-11-27 23:59:48,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:59:48,384 INFO L225 Difference]: With dead ends: 36 [2019-11-27 23:59:48,385 INFO L226 Difference]: Without dead ends: 28 [2019-11-27 23:59:48,385 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2019-11-27 23:59:48,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-27 23:59:48,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-27 23:59:48,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-27 23:59:48,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-11-27 23:59:48,391 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2019-11-27 23:59:48,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:59:48,391 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-11-27 23:59:48,391 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-27 23:59:48,392 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-11-27 23:59:48,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-27 23:59:48,392 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:59:48,393 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1] [2019-11-27 23:59:48,603 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:59:48,603 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:59:48,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:59:48,605 INFO L82 PathProgramCache]: Analyzing trace with hash -2047865492, now seen corresponding path program 4 times [2019-11-27 23:59:48,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:59:48,606 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868532776] [2019-11-27 23:59:48,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:59:48,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:59:48,710 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:59:48,711 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868532776] [2019-11-27 23:59:48,711 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282988213] [2019-11-27 23:59:48,711 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:59:48,736 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-27 23:59:48,736 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 23:59:48,737 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-27 23:59:48,739 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:59:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:59:48,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 23:59:48,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2019-11-27 23:59:48,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866726920] [2019-11-27 23:59:48,846 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-27 23:59:48,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:59:48,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-27 23:59:48,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2019-11-27 23:59:48,847 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 20 states. [2019-11-27 23:59:48,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:59:48,938 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2019-11-27 23:59:48,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-27 23:59:48,938 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 25 [2019-11-27 23:59:48,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:59:48,939 INFO L225 Difference]: With dead ends: 41 [2019-11-27 23:59:48,940 INFO L226 Difference]: Without dead ends: 33 [2019-11-27 23:59:48,940 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2019-11-27 23:59:48,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-27 23:59:48,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2019-11-27 23:59:48,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-27 23:59:48,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2019-11-27 23:59:48,946 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 25 [2019-11-27 23:59:48,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:59:48,947 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2019-11-27 23:59:48,947 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-27 23:59:48,947 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2019-11-27 23:59:48,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-27 23:59:48,948 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:59:48,948 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1] [2019-11-27 23:59:49,151 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 23:59:49,152 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:59:49,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:59:49,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1174166319, now seen corresponding path program 5 times [2019-11-27 23:59:49,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:59:49,153 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829245972] [2019-11-27 23:59:49,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:59:49,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 23:59:49,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 23:59:49,241 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-27 23:59:49,241 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-27 23:59:49,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.11 11:59:49 BoogieIcfgContainer [2019-11-27 23:59:49,275 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-27 23:59:49,276 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-27 23:59:49,276 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-27 23:59:49,276 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-27 23:59:49,277 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:59:44" (3/4) ... [2019-11-27 23:59:49,280 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-27 23:59:49,383 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-27 23:59:49,387 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-27 23:59:49,390 INFO L168 Benchmark]: Toolchain (without parser) took 5461.68 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 201.9 MB). Free memory was 955.0 MB in the beginning and 1.1 GB in the end (delta: -155.5 MB). Peak memory consumption was 46.4 MB. Max. memory is 11.5 GB. [2019-11-27 23:59:49,391 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 23:59:49,393 INFO L168 Benchmark]: CACSL2BoogieTranslator took 222.84 ms. Allocated memory is still 1.0 GB. Free memory was 955.0 MB in the beginning and 944.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-27 23:59:49,393 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.88 ms. Allocated memory is still 1.0 GB. Free memory is still 944.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 23:59:49,399 INFO L168 Benchmark]: Boogie Preprocessor took 70.89 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 944.3 MB in the beginning and 1.1 GB in the end (delta: -183.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-27 23:59:49,400 INFO L168 Benchmark]: RCFGBuilder took 233.96 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 11.5 GB. [2019-11-27 23:59:49,401 INFO L168 Benchmark]: TraceAbstraction took 4790.93 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 64.0 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.5 MB). Peak memory consumption was 70.5 MB. Max. memory is 11.5 GB. [2019-11-27 23:59:49,401 INFO L168 Benchmark]: Witness Printer took 111.39 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24 B). Peak memory consumption was 24 B. Max. memory is 11.5 GB. [2019-11-27 23:59:49,408 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 222.84 ms. Allocated memory is still 1.0 GB. Free memory was 955.0 MB in the beginning and 944.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.88 ms. Allocated memory is still 1.0 GB. Free memory is still 944.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 70.89 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 944.3 MB in the beginning and 1.1 GB in the end (delta: -183.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 233.96 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4790.93 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 64.0 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.5 MB). Peak memory consumption was 70.5 MB. Max. memory is 11.5 GB. * Witness Printer took 111.39 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24 B). Peak memory consumption was 24 B. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i