./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 f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_eb17c6e9-504a-47cc-9751-b1a37386afc4/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_eb17c6e9-504a-47cc-9751-b1a37386afc4/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_eb17c6e9-504a-47cc-9751-b1a37386afc4/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_eb17c6e9-504a-47cc-9751-b1a37386afc4/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Addition01-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_eb17c6e9-504a-47cc-9751-b1a37386afc4/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_eb17c6e9-504a-47cc-9751-b1a37386afc4/bin/uautomizer --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 0.1.25-f470102 [2019-12-07 10:07:28,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 10:07:28,789 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 10:07:28,798 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 10:07:28,798 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 10:07:28,799 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 10:07:28,800 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 10:07:28,802 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 10:07:28,803 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 10:07:28,804 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 10:07:28,805 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 10:07:28,805 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 10:07:28,806 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 10:07:28,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 10:07:28,807 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 10:07:28,808 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 10:07:28,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 10:07:28,809 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 10:07:28,810 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 10:07:28,812 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 10:07:28,813 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 10:07:28,814 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 10:07:28,814 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 10:07:28,815 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 10:07:28,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 10:07:28,817 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 10:07:28,817 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 10:07:28,817 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 10:07:28,817 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 10:07:28,818 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 10:07:28,818 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 10:07:28,819 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 10:07:28,819 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 10:07:28,819 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 10:07:28,820 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 10:07:28,820 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 10:07:28,820 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 10:07:28,821 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 10:07:28,821 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 10:07:28,821 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 10:07:28,822 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 10:07:28,822 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_eb17c6e9-504a-47cc-9751-b1a37386afc4/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 10:07:28,832 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 10:07:28,832 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 10:07:28,832 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 10:07:28,833 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 10:07:28,833 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 10:07:28,833 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 10:07:28,833 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 10:07:28,833 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 10:07:28,833 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 10:07:28,833 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 10:07:28,834 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 10:07:28,834 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 10:07:28,834 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 10:07:28,834 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 10:07:28,834 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 10:07:28,834 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 10:07:28,834 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 10:07:28,835 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 10:07:28,835 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 10:07:28,835 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 10:07:28,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 10:07:28,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 10:07:28,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 10:07:28,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 10:07:28,835 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 10:07:28,836 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 10:07:28,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 10:07:28,836 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 10:07:28,836 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 10:07:28,836 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 -> /tmp/vcloud-vcloud-master/worker/run_dir_eb17c6e9-504a-47cc-9751-b1a37386afc4/bin/uautomizer 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 [2019-12-07 10:07:28,938 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 10:07:28,945 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 10:07:28,947 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 10:07:28,948 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 10:07:28,948 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 10:07:28,949 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_eb17c6e9-504a-47cc-9751-b1a37386afc4/bin/uautomizer/../../sv-benchmarks/c/recursive/Addition01-2.c [2019-12-07 10:07:28,983 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_eb17c6e9-504a-47cc-9751-b1a37386afc4/bin/uautomizer/data/a42231723/d8ee43a172a44ae0b2ca0b8386187533/FLAG653900a45 [2019-12-07 10:07:29,375 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 10:07:29,376 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_eb17c6e9-504a-47cc-9751-b1a37386afc4/sv-benchmarks/c/recursive/Addition01-2.c [2019-12-07 10:07:29,380 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_eb17c6e9-504a-47cc-9751-b1a37386afc4/bin/uautomizer/data/a42231723/d8ee43a172a44ae0b2ca0b8386187533/FLAG653900a45 [2019-12-07 10:07:29,388 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_eb17c6e9-504a-47cc-9751-b1a37386afc4/bin/uautomizer/data/a42231723/d8ee43a172a44ae0b2ca0b8386187533 [2019-12-07 10:07:29,390 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 10:07:29,391 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 10:07:29,392 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 10:07:29,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 10:07:29,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 10:07:29,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 10:07:29" (1/1) ... [2019-12-07 10:07:29,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6947e074 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:29, skipping insertion in model container [2019-12-07 10:07:29,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 10:07:29" (1/1) ... [2019-12-07 10:07:29,402 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 10:07:29,413 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 10:07:29,511 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 10:07:29,514 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 10:07:29,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 10:07:29,564 INFO L208 MainTranslator]: Completed translation [2019-12-07 10:07:29,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:29 WrapperNode [2019-12-07 10:07:29,564 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 10:07:29,565 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 10:07:29,565 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 10:07:29,565 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 10:07:29,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:29" (1/1) ... [2019-12-07 10:07:29,574 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:29" (1/1) ... [2019-12-07 10:07:29,585 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 10:07:29,585 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 10:07:29,585 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 10:07:29,585 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 10:07:29,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:29" (1/1) ... [2019-12-07 10:07:29,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:29" (1/1) ... [2019-12-07 10:07:29,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:29" (1/1) ... [2019-12-07 10:07:29,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:29" (1/1) ... [2019-12-07 10:07:29,593 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:29" (1/1) ... [2019-12-07 10:07:29,594 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:29" (1/1) ... [2019-12-07 10:07:29,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:29" (1/1) ... [2019-12-07 10:07:29,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 10:07:29,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 10:07:29,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 10:07:29,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 10:07:29,596 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb17c6e9-504a-47cc-9751-b1a37386afc4/bin/uautomizer/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 [2019-12-07 10:07:29,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 10:07:29,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 10:07:29,635 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2019-12-07 10:07:29,635 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2019-12-07 10:07:29,741 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 10:07:29,741 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 10:07:29,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:07:29 BoogieIcfgContainer [2019-12-07 10:07:29,742 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 10:07:29,743 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 10:07:29,743 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 10:07:29,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 10:07:29,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 10:07:29" (1/3) ... [2019-12-07 10:07:29,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9a5aad6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 10:07:29, skipping insertion in model container [2019-12-07 10:07:29,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:29" (2/3) ... [2019-12-07 10:07:29,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9a5aad6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 10:07:29, skipping insertion in model container [2019-12-07 10:07:29,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:07:29" (3/3) ... [2019-12-07 10:07:29,748 INFO L109 eAbstractionObserver]: Analyzing ICFG Addition01-2.c [2019-12-07 10:07:29,757 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 10:07:29,762 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 10:07:29,771 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 10:07:29,785 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 10:07:29,785 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 10:07:29,785 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 10:07:29,785 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 10:07:29,785 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 10:07:29,785 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 10:07:29,785 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 10:07:29,785 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 10:07:29,796 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-12-07 10:07:29,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 10:07:29,800 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:07:29,800 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:07:29,800 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:07:29,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:07:29,804 INFO L82 PathProgramCache]: Analyzing trace with hash -2068195676, now seen corresponding path program 1 times [2019-12-07 10:07:29,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:07:29,810 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699454705] [2019-12-07 10:07:29,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:07:29,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:29,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:29,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:07:29,986 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699454705] [2019-12-07 10:07:29,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 10:07:29,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-12-07 10:07:29,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820150084] [2019-12-07 10:07:29,992 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 10:07:29,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:07:30,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 10:07:30,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-12-07 10:07:30,007 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 6 states. [2019-12-07 10:07:30,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:07:30,103 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2019-12-07 10:07:30,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 10:07:30,104 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-12-07 10:07:30,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:07:30,111 INFO L225 Difference]: With dead ends: 33 [2019-12-07 10:07:30,111 INFO L226 Difference]: Without dead ends: 20 [2019-12-07 10:07:30,113 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-12-07 10:07:30,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-12-07 10:07:30,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-12-07 10:07:30,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-12-07 10:07:30,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2019-12-07 10:07:30,141 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 11 [2019-12-07 10:07:30,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:07:30,141 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2019-12-07 10:07:30,141 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 10:07:30,141 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2019-12-07 10:07:30,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 10:07:30,143 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:07:30,143 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:07:30,143 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:07:30,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:07:30,143 INFO L82 PathProgramCache]: Analyzing trace with hash 800728349, now seen corresponding path program 1 times [2019-12-07 10:07:30,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:07:30,143 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987407235] [2019-12-07 10:07:30,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:07:30,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:30,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:30,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:07:30,170 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987407235] [2019-12-07 10:07:30,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 10:07:30,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 10:07:30,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694580789] [2019-12-07 10:07:30,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 10:07:30,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:07:30,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 10:07:30,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 10:07:30,172 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand 4 states. [2019-12-07 10:07:30,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:07:30,187 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2019-12-07 10:07:30,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 10:07:30,188 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-12-07 10:07:30,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:07:30,188 INFO L225 Difference]: With dead ends: 30 [2019-12-07 10:07:30,188 INFO L226 Difference]: Without dead ends: 22 [2019-12-07 10:07:30,189 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 [2019-12-07 10:07:30,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-12-07 10:07:30,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2019-12-07 10:07:30,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-12-07 10:07:30,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-12-07 10:07:30,194 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2019-12-07 10:07:30,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:07:30,194 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-12-07 10:07:30,194 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 10:07:30,194 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-12-07 10:07:30,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-07 10:07:30,195 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:07:30,195 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:07:30,195 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:07:30,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:07:30,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1352688745, now seen corresponding path program 1 times [2019-12-07 10:07:30,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:07:30,196 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818349920] [2019-12-07 10:07:30,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:07:30,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:30,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:30,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 10:07:30,315 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818349920] [2019-12-07 10:07:30,316 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075449088] [2019-12-07 10:07:30,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb17c6e9-504a-47cc-9751-b1a37386afc4/bin/uautomizer/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 [2019-12-07 10:07:30,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:30,343 INFO L264 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 27 conjunts are in the unsatisfiable core [2019-12-07 10:07:30,347 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:07:30,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 10:07:30,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 10:07:30,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2019-12-07 10:07:30,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289983889] [2019-12-07 10:07:30,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-07 10:07:30,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:07:30,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-07 10:07:30,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2019-12-07 10:07:30,457 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 15 states. [2019-12-07 10:07:30,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:07:30,667 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2019-12-07 10:07:30,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 10:07:30,667 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-07 10:07:30,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:07:30,668 INFO L225 Difference]: With dead ends: 34 [2019-12-07 10:07:30,669 INFO L226 Difference]: Without dead ends: 28 [2019-12-07 10:07:30,669 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2019-12-07 10:07:30,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-07 10:07:30,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2019-12-07 10:07:30,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-12-07 10:07:30,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-12-07 10:07:30,676 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 18 [2019-12-07 10:07:30,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:07:30,676 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-12-07 10:07:30,676 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-07 10:07:30,676 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-12-07 10:07:30,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-07 10:07:30,677 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:07:30,677 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:07:30,878 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:07:30,878 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:07:30,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:07:30,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1841388592, now seen corresponding path program 1 times [2019-12-07 10:07:30,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:07:30,879 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299354436] [2019-12-07 10:07:30,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:07:30,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:30,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:30,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 10:07:30,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299354436] [2019-12-07 10:07:30,986 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304839785] [2019-12-07 10:07:30,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb17c6e9-504a-47cc-9751-b1a37386afc4/bin/uautomizer/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 [2019-12-07 10:07:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:31,016 INFO L264 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 10:07:31,018 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:07:31,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 10:07:31,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 10:07:31,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-12-07 10:07:31,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318846065] [2019-12-07 10:07:31,037 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 10:07:31,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:07:31,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 10:07:31,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-07 10:07:31,038 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 7 states. [2019-12-07 10:07:31,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:07:31,075 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2019-12-07 10:07:31,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 10:07:31,076 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2019-12-07 10:07:31,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:07:31,077 INFO L225 Difference]: With dead ends: 27 [2019-12-07 10:07:31,077 INFO L226 Difference]: Without dead ends: 23 [2019-12-07 10:07:31,077 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 [2019-12-07 10:07:31,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-12-07 10:07:31,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-12-07 10:07:31,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-07 10:07:31,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2019-12-07 10:07:31,081 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 19 [2019-12-07 10:07:31,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:07:31,082 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2019-12-07 10:07:31,082 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 10:07:31,082 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2019-12-07 10:07:31,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-07 10:07:31,083 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:07:31,083 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] [2019-12-07 10:07:31,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:07:31,284 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:07:31,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:07:31,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1779834275, now seen corresponding path program 1 times [2019-12-07 10:07:31,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:07:31,287 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512776800] [2019-12-07 10:07:31,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:07:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:31,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:31,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:31,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:31,377 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 10:07:31,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512776800] [2019-12-07 10:07:31,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292827912] [2019-12-07 10:07:31,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb17c6e9-504a-47cc-9751-b1a37386afc4/bin/uautomizer/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 [2019-12-07 10:07:31,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:07:31,400 INFO L264 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 10:07:31,401 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:07:31,412 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 10:07:31,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 10:07:31,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-12-07 10:07:31,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097633583] [2019-12-07 10:07:31,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 10:07:31,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:07:31,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 10:07:31,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-07 10:07:31,414 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 7 states. [2019-12-07 10:07:31,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:07:31,446 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2019-12-07 10:07:31,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 10:07:31,446 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2019-12-07 10:07:31,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:07:31,447 INFO L225 Difference]: With dead ends: 28 [2019-12-07 10:07:31,447 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 10:07:31,447 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 [2019-12-07 10:07:31,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 10:07:31,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 10:07:31,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 10:07:31,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 10:07:31,448 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2019-12-07 10:07:31,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:07:31,448 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 10:07:31,448 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 10:07:31,448 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 10:07:31,449 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 10:07:31,649 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:07:31,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-12-07 10:07:31,741 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-12-07 10:07:31,741 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-12-07 10:07:31,741 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-12-07 10:07:31,741 INFO L246 CegarLoopResult]: For program point L28(lines 28 32) no Hoare annotation was computed. [2019-12-07 10:07:31,741 INFO L249 CegarLoopResult]: At program point L26(lines 26 45) the Hoare annotation is: true [2019-12-07 10:07:31,742 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2019-12-07 10:07:31,742 INFO L246 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2019-12-07 10:07:31,742 INFO L246 CegarLoopResult]: For program point L40(lines 40 44) no Hoare annotation was computed. [2019-12-07 10:07:31,742 INFO L242 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (<= 0 ULTIMATE.start_main_~n~0) [2019-12-07 10:07:31,742 INFO L246 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2019-12-07 10:07:31,743 INFO L246 CegarLoopResult]: For program point L34(lines 34 38) no Hoare annotation was computed. [2019-12-07 10:07:31,743 INFO L246 CegarLoopResult]: For program point additionFINAL(lines 13 23) no Hoare annotation was computed. [2019-12-07 10:07:31,743 INFO L242 CegarLoopResult]: 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)) [2019-12-07 10:07:31,743 INFO L246 CegarLoopResult]: For program point L20(lines 20 22) no Hoare annotation was computed. [2019-12-07 10:07:31,743 INFO L246 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2019-12-07 10:07:31,743 INFO L242 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (and (= |addition_#in~n| addition_~n) (= |addition_#in~m| addition_~m) (<= 1 addition_~n)) [2019-12-07 10:07:31,743 INFO L246 CegarLoopResult]: For program point L17(lines 17 19) no Hoare annotation was computed. [2019-12-07 10:07:31,744 INFO L246 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2019-12-07 10:07:31,744 INFO L249 CegarLoopResult]: At program point additionENTRY(lines 13 23) the Hoare annotation is: true [2019-12-07 10:07:31,744 INFO L246 CegarLoopResult]: For program point L14(lines 14 16) no Hoare annotation was computed. [2019-12-07 10:07:31,744 INFO L246 CegarLoopResult]: For program point additionEXIT(lines 13 23) no Hoare annotation was computed. [2019-12-07 10:07:31,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 10:07:31 BoogieIcfgContainer [2019-12-07 10:07:31,753 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 10:07:31,754 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 10:07:31,754 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 10:07:31,754 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 10:07:31,755 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:07:29" (3/4) ... [2019-12-07 10:07:31,758 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 10:07:31,765 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure addition [2019-12-07 10:07:31,768 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-12-07 10:07:31,768 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-12-07 10:07:31,799 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_eb17c6e9-504a-47cc-9751-b1a37386afc4/bin/uautomizer/witness.graphml [2019-12-07 10:07:31,799 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 10:07:31,801 INFO L168 Benchmark]: Toolchain (without parser) took 2409.05 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 100.1 MB). Free memory was 944.7 MB in the beginning and 874.6 MB in the end (delta: 70.1 MB). Peak memory consumption was 170.2 MB. Max. memory is 11.5 GB. [2019-12-07 10:07:31,801 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 10:07:31,801 INFO L168 Benchmark]: CACSL2BoogieTranslator took 172.69 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 100.1 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -150.4 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-12-07 10:07:31,802 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.89 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 10:07:31,802 INFO L168 Benchmark]: Boogie Preprocessor took 10.77 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 10:07:31,802 INFO L168 Benchmark]: RCFGBuilder took 146.35 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: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 11.5 GB. [2019-12-07 10:07:31,803 INFO L168 Benchmark]: TraceAbstraction took 2010.91 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 874.6 MB in the end (delta: 203.3 MB). Peak memory consumption was 203.3 MB. Max. memory is 11.5 GB. [2019-12-07 10:07:31,803 INFO L168 Benchmark]: Witness Printer took 45.45 ms. Allocated memory is still 1.1 GB. Free memory is still 874.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 10:07:31,805 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 172.69 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 100.1 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -150.4 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 19.89 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.77 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 146.35 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: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2010.91 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 874.6 MB in the end (delta: 203.3 MB). Peak memory consumption was 203.3 MB. Max. memory is 11.5 GB. * Witness Printer took 45.45 ms. Allocated memory is still 1.1 GB. Free memory is still 874.6 MB. There was no memory consumed. 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: 1.8s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 80 SDtfs, 57 SDslu, 172 SDs, 0 SdLazy, 352 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 115 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s 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, 0.0s SatisfiabilityAnalysisTime, 0.5s 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...