./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/Addition01-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f6fb2bb1 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/recursive/Addition01-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 91d2600fad1210650d8ad3da481cdcc11b280095 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-f6fb2bb [2019-11-19 18:58:01,635 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 18:58:01,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 18:58:01,655 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 18:58:01,656 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 18:58:01,657 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 18:58:01,658 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 18:58:01,660 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 18:58:01,662 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 18:58:01,663 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 18:58:01,664 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 18:58:01,665 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 18:58:01,665 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 18:58:01,666 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 18:58:01,668 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 18:58:01,669 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 18:58:01,671 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 18:58:01,673 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 18:58:01,674 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 18:58:01,676 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 18:58:01,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 18:58:01,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 18:58:01,680 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 18:58:01,681 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 18:58:01,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 18:58:01,684 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 18:58:01,684 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 18:58:01,685 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 18:58:01,686 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 18:58:01,687 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 18:58:01,687 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 18:58:01,688 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 18:58:01,689 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 18:58:01,690 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 18:58:01,691 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 18:58:01,691 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 18:58:01,692 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 18:58:01,692 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 18:58:01,692 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 18:58:01,693 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 18:58:01,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 18:58:01,695 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-19 18:58:01,710 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 18:58:01,711 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 18:58:01,712 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 18:58:01,712 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 18:58:01,712 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 18:58:01,713 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 18:58:01,713 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-19 18:58:01,713 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 18:58:01,713 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-19 18:58:01,713 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 18:58:01,714 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-19 18:58:01,714 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 18:58:01,714 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-19 18:58:01,714 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-19 18:58:01,715 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-19 18:58:01,715 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 18:58:01,715 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-19 18:58:01,715 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 18:58:01,715 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 18:58:01,716 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 18:58:01,716 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 18:58:01,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 18:58:01,716 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 18:58:01,717 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 18:58:01,717 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-19 18:58:01,717 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-19 18:58:01,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-19 18:58:01,718 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-19 18:58:01,718 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 -> 91d2600fad1210650d8ad3da481cdcc11b280095 [2019-11-19 18:58:02,027 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 18:58:02,042 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 18:58:02,046 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 18:58:02,047 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 18:58:02,048 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 18:58:02,050 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Addition01-2.c [2019-11-19 18:58:02,129 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afd490959/0817714fd2fc4ba684215789ed00e5f3/FLAG601c2e2f2 [2019-11-19 18:58:02,595 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 18:58:02,597 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Addition01-2.c [2019-11-19 18:58:02,605 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afd490959/0817714fd2fc4ba684215789ed00e5f3/FLAG601c2e2f2 [2019-11-19 18:58:02,980 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afd490959/0817714fd2fc4ba684215789ed00e5f3 [2019-11-19 18:58:02,984 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 18:58:02,986 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-19 18:58:02,987 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 18:58:02,988 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 18:58:02,991 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 18:58:02,992 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:58:02" (1/1) ... [2019-11-19 18:58:02,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@136f404e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:58:02, skipping insertion in model container [2019-11-19 18:58:02,996 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:58:02" (1/1) ... [2019-11-19 18:58:03,004 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 18:58:03,022 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 18:58:03,207 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 18:58:03,211 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 18:58:03,227 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 18:58:03,239 INFO L192 MainTranslator]: Completed translation [2019-11-19 18:58:03,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:58:03 WrapperNode [2019-11-19 18:58:03,239 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 18:58:03,240 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-19 18:58:03,240 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-19 18:58:03,240 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-19 18:58:03,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:58:03" (1/1) ... [2019-11-19 18:58:03,251 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:58:03" (1/1) ... [2019-11-19 18:58:03,322 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-19 18:58:03,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 18:58:03,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 18:58:03,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 18:58:03,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:58:03" (1/1) ... [2019-11-19 18:58:03,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:58:03" (1/1) ... [2019-11-19 18:58:03,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:58:03" (1/1) ... [2019-11-19 18:58:03,331 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:58:03" (1/1) ... [2019-11-19 18:58:03,333 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:58:03" (1/1) ... [2019-11-19 18:58:03,335 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:58:03" (1/1) ... [2019-11-19 18:58:03,336 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:58:03" (1/1) ... [2019-11-19 18:58:03,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 18:58:03,338 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 18:58:03,338 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 18:58:03,338 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 18:58:03,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:58:03" (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 [2019-11-19 18:58:03,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 18:58:03,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 18:58:03,400 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2019-11-19 18:58:03,400 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2019-11-19 18:58:03,586 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 18:58:03,586 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-19 18:58:03,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:58:03 BoogieIcfgContainer [2019-11-19 18:58:03,588 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 18:58:03,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 18:58:03,589 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 18:58:03,593 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 18:58:03,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:58:02" (1/3) ... [2019-11-19 18:58:03,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cb7fc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:58:03, skipping insertion in model container [2019-11-19 18:58:03,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:58:03" (2/3) ... [2019-11-19 18:58:03,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cb7fc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:58:03, skipping insertion in model container [2019-11-19 18:58:03,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:58:03" (3/3) ... [2019-11-19 18:58:03,597 INFO L109 eAbstractionObserver]: Analyzing ICFG Addition01-2.c [2019-11-19 18:58:03,609 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 18:58:03,621 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-19 18:58:03,633 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-19 18:58:03,674 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 18:58:03,674 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-19 18:58:03,674 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 18:58:03,675 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 18:58:03,675 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 18:58:03,675 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 18:58:03,675 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 18:58:03,675 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 18:58:03,696 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-11-19 18:58:03,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-19 18:58:03,704 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:58:03,707 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:58:03,708 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:58:03,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:58:03,722 INFO L82 PathProgramCache]: Analyzing trace with hash -2068195676, now seen corresponding path program 1 times [2019-11-19 18:58:03,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:58:03,733 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267676539] [2019-11-19 18:58:03,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:58:03,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:03,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:04,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 18:58:04,096 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267676539] [2019-11-19 18:58:04,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 18:58:04,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-19 18:58:04,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216177390] [2019-11-19 18:58:04,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 18:58:04,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:58:04,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 18:58:04,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-19 18:58:04,126 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 6 states. [2019-11-19 18:58:04,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:58:04,311 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2019-11-19 18:58:04,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 18:58:04,314 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-19 18:58:04,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:58:04,325 INFO L225 Difference]: With dead ends: 33 [2019-11-19 18:58:04,325 INFO L226 Difference]: Without dead ends: 20 [2019-11-19 18:58:04,329 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-19 18:58:04,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-19 18:58:04,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-19 18:58:04,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-19 18:58:04,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2019-11-19 18:58:04,377 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 11 [2019-11-19 18:58:04,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:58:04,378 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2019-11-19 18:58:04,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 18:58:04,378 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2019-11-19 18:58:04,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-19 18:58:04,380 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:58:04,380 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:58:04,381 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:58:04,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:58:04,381 INFO L82 PathProgramCache]: Analyzing trace with hash 800728349, now seen corresponding path program 1 times [2019-11-19 18:58:04,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:58:04,382 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213658372] [2019-11-19 18:58:04,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:58:04,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:04,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:04,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 18:58:04,426 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213658372] [2019-11-19 18:58:04,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 18:58:04,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-19 18:58:04,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633775775] [2019-11-19 18:58:04,429 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 18:58:04,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:58:04,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 18:58:04,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 18:58:04,430 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand 4 states. [2019-11-19 18:58:04,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:58:04,462 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2019-11-19 18:58:04,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 18:58:04,463 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-19 18:58:04,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:58:04,464 INFO L225 Difference]: With dead ends: 30 [2019-11-19 18:58:04,464 INFO L226 Difference]: Without dead ends: 22 [2019-11-19 18:58:04,466 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 18:58:04,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-19 18:58:04,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2019-11-19 18:58:04,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-19 18:58:04,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-11-19 18:58:04,474 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2019-11-19 18:58:04,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:58:04,474 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-11-19 18:58:04,474 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 18:58:04,474 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-11-19 18:58:04,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-19 18:58:04,476 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:58:04,476 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:58:04,476 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:58:04,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:58:04,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1352688745, now seen corresponding path program 1 times [2019-11-19 18:58:04,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:58:04,478 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944498425] [2019-11-19 18:58:04,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:58:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:04,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:04,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-19 18:58:04,750 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944498425] [2019-11-19 18:58:04,750 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334702256] [2019-11-19 18:58:04,750 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 [2019-11-19 18:58:04,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:04,797 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-19 18:58:04,803 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 18:58:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 18:58:05,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 18:58:05,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2019-11-19 18:58:05,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83889241] [2019-11-19 18:58:05,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-19 18:58:05,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:58:05,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-19 18:58:05,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2019-11-19 18:58:05,021 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 15 states. [2019-11-19 18:58:05,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:58:05,377 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2019-11-19 18:58:05,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-19 18:58:05,377 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-11-19 18:58:05,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:58:05,379 INFO L225 Difference]: With dead ends: 34 [2019-11-19 18:58:05,379 INFO L226 Difference]: Without dead ends: 28 [2019-11-19 18:58:05,380 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2019-11-19 18:58:05,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-19 18:58:05,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2019-11-19 18:58:05,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-19 18:58:05,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-11-19 18:58:05,393 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 18 [2019-11-19 18:58:05,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:58:05,394 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-11-19 18:58:05,395 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-19 18:58:05,395 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-11-19 18:58:05,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-19 18:58:05,397 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:58:05,397 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:58:05,601 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:58:05,602 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:58:05,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:58:05,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1841388592, now seen corresponding path program 1 times [2019-11-19 18:58:05,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:58:05,604 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401357903] [2019-11-19 18:58:05,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:58:05,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:05,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:05,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:05,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 18:58:05,723 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401357903] [2019-11-19 18:58:05,723 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906951058] [2019-11-19 18:58:05,724 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 [2019-11-19 18:58:05,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:05,764 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 18:58:05,767 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 18:58:05,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 18:58:05,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 18:58:05,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-19 18:58:05,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527946049] [2019-11-19 18:58:05,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-19 18:58:05,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:58:05,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-19 18:58:05,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-19 18:58:05,804 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 7 states. [2019-11-19 18:58:05,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:58:05,880 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2019-11-19 18:58:05,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-19 18:58:05,881 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2019-11-19 18:58:05,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:58:05,882 INFO L225 Difference]: With dead ends: 27 [2019-11-19 18:58:05,882 INFO L226 Difference]: Without dead ends: 23 [2019-11-19 18:58:05,883 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-19 18:58:05,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-19 18:58:05,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-19 18:58:05,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-19 18:58:05,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2019-11-19 18:58:05,889 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 19 [2019-11-19 18:58:05,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:58:05,890 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2019-11-19 18:58:05,890 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-19 18:58:05,890 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2019-11-19 18:58:05,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-19 18:58:05,891 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:58:05,892 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:58:06,103 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:58:06,104 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:58:06,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:58:06,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1779834275, now seen corresponding path program 1 times [2019-11-19 18:58:06,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:58:06,105 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263078461] [2019-11-19 18:58:06,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:58:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:06,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:06,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:06,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:06,235 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-19 18:58:06,236 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263078461] [2019-11-19 18:58:06,236 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857679703] [2019-11-19 18:58:06,237 INFO L94 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 [2019-11-19 18:58:06,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:58:06,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 18:58:06,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 18:58:06,303 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-19 18:58:06,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 18:58:06,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-19 18:58:06,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798742158] [2019-11-19 18:58:06,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-19 18:58:06,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:58:06,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-19 18:58:06,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-19 18:58:06,305 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 7 states. [2019-11-19 18:58:06,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:58:06,368 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2019-11-19 18:58:06,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-19 18:58:06,369 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2019-11-19 18:58:06,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:58:06,369 INFO L225 Difference]: With dead ends: 28 [2019-11-19 18:58:06,370 INFO L226 Difference]: Without dead ends: 0 [2019-11-19 18:58:06,371 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-19 18:58:06,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-19 18:58:06,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-19 18:58:06,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-19 18:58:06,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-19 18:58:06,373 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2019-11-19 18:58:06,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:58:06,373 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-19 18:58:06,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-19 18:58:06,374 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-19 18:58:06,374 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-19 18:58:06,575 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:58:06,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-19 18:58:06,646 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-19 18:58:06,647 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-19 18:58:06,647 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-19 18:58:06,647 INFO L444 ceAbstractionStarter]: For program point L28(lines 28 32) no Hoare annotation was computed. [2019-11-19 18:58:06,647 INFO L447 ceAbstractionStarter]: At program point L26(lines 26 45) the Hoare annotation is: true [2019-11-19 18:58:06,648 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2019-11-19 18:58:06,648 INFO L444 ceAbstractionStarter]: For program point L43(line 43) no Hoare annotation was computed. [2019-11-19 18:58:06,648 INFO L444 ceAbstractionStarter]: For program point L40(lines 40 44) no Hoare annotation was computed. [2019-11-19 18:58:06,648 INFO L440 ceAbstractionStarter]: At program point L39(line 39) the Hoare annotation is: (<= 0 ULTIMATE.start_main_~n~0) [2019-11-19 18:58:06,648 INFO L444 ceAbstractionStarter]: For program point L39-1(line 39) no Hoare annotation was computed. [2019-11-19 18:58:06,648 INFO L444 ceAbstractionStarter]: For program point L34(lines 34 38) no Hoare annotation was computed. [2019-11-19 18:58:06,648 INFO L444 ceAbstractionStarter]: For program point additionFINAL(lines 13 23) no Hoare annotation was computed. [2019-11-19 18:58:06,649 INFO L440 ceAbstractionStarter]: At program point L21(line 21) the Hoare annotation is: (and (= |addition_#in~n| addition_~n) (= |addition_#in~m| addition_~m) (<= (+ addition_~n 1) 0)) [2019-11-19 18:58:06,649 INFO L444 ceAbstractionStarter]: For program point L20(lines 20 22) no Hoare annotation was computed. [2019-11-19 18:58:06,649 INFO L444 ceAbstractionStarter]: For program point L21-1(line 21) no Hoare annotation was computed. [2019-11-19 18:58:06,649 INFO L440 ceAbstractionStarter]: At program point L18(line 18) the Hoare annotation is: (and (= |addition_#in~n| addition_~n) (= |addition_#in~m| addition_~m) (<= 1 addition_~n)) [2019-11-19 18:58:06,649 INFO L444 ceAbstractionStarter]: For program point L17(lines 17 19) no Hoare annotation was computed. [2019-11-19 18:58:06,649 INFO L444 ceAbstractionStarter]: For program point L18-1(line 18) no Hoare annotation was computed. [2019-11-19 18:58:06,649 INFO L447 ceAbstractionStarter]: At program point additionENTRY(lines 13 23) the Hoare annotation is: true [2019-11-19 18:58:06,649 INFO L444 ceAbstractionStarter]: For program point L14(lines 14 16) no Hoare annotation was computed. [2019-11-19 18:58:06,650 INFO L444 ceAbstractionStarter]: For program point additionEXIT(lines 13 23) no Hoare annotation was computed. [2019-11-19 18:58:06,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 06:58:06 BoogieIcfgContainer [2019-11-19 18:58:06,658 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-19 18:58:06,659 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-19 18:58:06,659 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-19 18:58:06,659 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-19 18:58:06,660 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:58:03" (3/4) ... [2019-11-19 18:58:06,663 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-19 18:58:06,670 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure addition [2019-11-19 18:58:06,674 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-19 18:58:06,674 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-11-19 18:58:06,722 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-19 18:58:06,723 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-19 18:58:06,725 INFO L168 Benchmark]: Toolchain (without parser) took 3738.74 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.5 MB). Free memory was 957.7 MB in the beginning and 893.7 MB in the end (delta: 64.0 MB). Peak memory consumption was 183.5 MB. Max. memory is 11.5 GB. [2019-11-19 18:58:06,726 INFO L168 Benchmark]: CDTParser took 0.53 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 18:58:06,726 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.05 ms. Allocated memory is still 1.0 GB. Free memory was 957.7 MB in the beginning and 946.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-19 18:58:06,727 INFO L168 Benchmark]: Boogie Procedure Inliner took 81.91 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.5 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -169.0 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-19 18:58:06,728 INFO L168 Benchmark]: Boogie Preprocessor took 15.63 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-19 18:58:06,728 INFO L168 Benchmark]: RCFGBuilder took 250.07 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 11.5 GB. [2019-11-19 18:58:06,729 INFO L168 Benchmark]: TraceAbstraction took 3069.25 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 900.4 MB in the end (delta: 197.7 MB). Peak memory consumption was 197.7 MB. Max. memory is 11.5 GB. [2019-11-19 18:58:06,730 INFO L168 Benchmark]: Witness Printer took 64.09 ms. Allocated memory is still 1.1 GB. Free memory was 900.4 MB in the beginning and 893.7 MB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-19 18:58:06,734 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.53 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 252.05 ms. Allocated memory is still 1.0 GB. Free memory was 957.7 MB in the beginning and 946.9 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 81.91 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.5 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -169.0 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.63 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 250.07 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3069.25 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 900.4 MB in the end (delta: 197.7 MB). Peak memory consumption was 197.7 MB. Max. memory is 11.5 GB. * Witness Printer took 64.09 ms. Allocated memory is still 1.1 GB. Free memory was 900.4 MB in the beginning and 893.7 MB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 1 error locations. Result: SAFE, OverallTime: 2.9s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 80 SDtfs, 57 SDslu, 172 SDs, 0 SdLazy, 352 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 115 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=4, 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, 5 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 11 PreInvPairs, 13 NumberOfFragments, 27 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 11 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 150 NumberOfCodeBlocks, 150 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 142 ConstructedInterpolants, 0 QuantifiedInterpolants, 8567 SizeOfPredicates, 11 NumberOfNonLiveVariables, 189 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 33/42 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...