./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id2_b3_o5.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_7057edff-96fb-493a-b896-57c139a1a994/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_7057edff-96fb-493a-b896-57c139a1a994/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_7057edff-96fb-493a-b896-57c139a1a994/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_7057edff-96fb-493a-b896-57c139a1a994/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id2_b3_o5.c -s /tmp/vcloud-vcloud-master/worker/run_dir_7057edff-96fb-493a-b896-57c139a1a994/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_7057edff-96fb-493a-b896-57c139a1a994/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 ceb806ae997f94b7f09b4e2dce31a0e63ff1a329 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 18:52:04,012 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 18:52:04,014 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 18:52:04,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 18:52:04,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 18:52:04,022 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 18:52:04,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 18:52:04,024 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 18:52:04,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 18:52:04,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 18:52:04,026 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 18:52:04,027 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 18:52:04,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 18:52:04,028 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 18:52:04,029 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 18:52:04,029 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 18:52:04,030 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 18:52:04,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 18:52:04,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 18:52:04,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 18:52:04,034 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 18:52:04,035 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 18:52:04,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 18:52:04,036 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 18:52:04,038 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 18:52:04,038 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 18:52:04,038 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 18:52:04,039 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 18:52:04,039 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 18:52:04,039 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 18:52:04,040 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 18:52:04,040 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 18:52:04,040 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 18:52:04,041 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 18:52:04,041 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 18:52:04,042 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 18:52:04,042 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 18:52:04,042 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 18:52:04,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 18:52:04,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 18:52:04,043 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 18:52:04,044 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_7057edff-96fb-493a-b896-57c139a1a994/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 18:52:04,053 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 18:52:04,053 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 18:52:04,054 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 18:52:04,054 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 18:52:04,054 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 18:52:04,054 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 18:52:04,055 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 18:52:04,055 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 18:52:04,055 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 18:52:04,055 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 18:52:04,055 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 18:52:04,055 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 18:52:04,055 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 18:52:04,055 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 18:52:04,056 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 18:52:04,056 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 18:52:04,056 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 18:52:04,056 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 18:52:04,056 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 18:52:04,056 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 18:52:04,056 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 18:52:04,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 18:52:04,057 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 18:52:04,057 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 18:52:04,057 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 18:52:04,057 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 18:52:04,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 18:52:04,057 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 18:52:04,057 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 18:52:04,057 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_7057edff-96fb-493a-b896-57c139a1a994/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 -> ceb806ae997f94b7f09b4e2dce31a0e63ff1a329 [2019-12-07 18:52:04,158 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 18:52:04,167 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 18:52:04,170 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 18:52:04,171 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 18:52:04,171 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 18:52:04,172 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_7057edff-96fb-493a-b896-57c139a1a994/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id2_b3_o5.c [2019-12-07 18:52:04,211 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7057edff-96fb-493a-b896-57c139a1a994/bin/uautomizer/data/c71d7be82/019826185dbe4a5491b8a60487caeb6d/FLAGfdf809c55 [2019-12-07 18:52:04,547 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 18:52:04,547 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_7057edff-96fb-493a-b896-57c139a1a994/sv-benchmarks/c/recursive-simple/id2_b3_o5.c [2019-12-07 18:52:04,551 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7057edff-96fb-493a-b896-57c139a1a994/bin/uautomizer/data/c71d7be82/019826185dbe4a5491b8a60487caeb6d/FLAGfdf809c55 [2019-12-07 18:52:04,560 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_7057edff-96fb-493a-b896-57c139a1a994/bin/uautomizer/data/c71d7be82/019826185dbe4a5491b8a60487caeb6d [2019-12-07 18:52:04,562 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 18:52:04,563 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 18:52:04,564 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 18:52:04,564 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 18:52:04,567 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 18:52:04,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:52:04" (1/1) ... [2019-12-07 18:52:04,569 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26e24b4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:52:04, skipping insertion in model container [2019-12-07 18:52:04,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:52:04" (1/1) ... [2019-12-07 18:52:04,574 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 18:52:04,585 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 18:52:04,718 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:52:04,720 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 18:52:04,731 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:52:04,740 INFO L208 MainTranslator]: Completed translation [2019-12-07 18:52:04,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:52:04 WrapperNode [2019-12-07 18:52:04,740 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 18:52:04,741 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 18:52:04,741 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 18:52:04,741 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 18:52:04,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:52:04" (1/1) ... [2019-12-07 18:52:04,749 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:52:04" (1/1) ... [2019-12-07 18:52:04,760 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 18:52:04,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 18:52:04,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 18:52:04,760 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 18:52:04,766 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:52:04" (1/1) ... [2019-12-07 18:52:04,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:52:04" (1/1) ... [2019-12-07 18:52:04,766 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:52:04" (1/1) ... [2019-12-07 18:52:04,766 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:52:04" (1/1) ... [2019-12-07 18:52:04,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:52:04" (1/1) ... [2019-12-07 18:52:04,769 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:52:04" (1/1) ... [2019-12-07 18:52:04,769 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:52:04" (1/1) ... [2019-12-07 18:52:04,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 18:52:04,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 18:52:04,770 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 18:52:04,770 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 18:52:04,771 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:52:04" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7057edff-96fb-493a-b896-57c139a1a994/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 18:52:04,809 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2019-12-07 18:52:04,809 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2019-12-07 18:52:04,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 18:52:04,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 18:52:04,810 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-12-07 18:52:04,810 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-12-07 18:52:04,911 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 18:52:04,911 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 18:52:04,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:52:04 BoogieIcfgContainer [2019-12-07 18:52:04,912 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 18:52:04,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 18:52:04,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 18:52:04,914 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 18:52:04,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 06:52:04" (1/3) ... [2019-12-07 18:52:04,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6618ab3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 06:52:04, skipping insertion in model container [2019-12-07 18:52:04,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:52:04" (2/3) ... [2019-12-07 18:52:04,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6618ab3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 06:52:04, skipping insertion in model container [2019-12-07 18:52:04,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:52:04" (3/3) ... [2019-12-07 18:52:04,917 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b3_o5.c [2019-12-07 18:52:04,923 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 18:52:04,927 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 18:52:04,935 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 18:52:04,949 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 18:52:04,949 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 18:52:04,949 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 18:52:04,949 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 18:52:04,949 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 18:52:04,949 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 18:52:04,949 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 18:52:04,949 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 18:52:04,960 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-12-07 18:52:04,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 18:52:04,963 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:52:04,964 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:52:04,964 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:52:04,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:52:04,968 INFO L82 PathProgramCache]: Analyzing trace with hash -394807891, now seen corresponding path program 1 times [2019-12-07 18:52:04,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:52:04,973 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357816428] [2019-12-07 18:52:04,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:52:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:05,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:05,123 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 18:52:05,124 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357816428] [2019-12-07 18:52:05,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:52:05,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 18:52:05,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205200661] [2019-12-07 18:52:05,128 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 18:52:05,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:52:05,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 18:52:05,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:52:05,138 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2019-12-07 18:52:05,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:52:05,172 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2019-12-07 18:52:05,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 18:52:05,173 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-07 18:52:05,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:52:05,182 INFO L225 Difference]: With dead ends: 35 [2019-12-07 18:52:05,182 INFO L226 Difference]: Without dead ends: 22 [2019-12-07 18:52:05,184 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:52:05,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-12-07 18:52:05,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-12-07 18:52:05,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 18:52:05,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-12-07 18:52:05,210 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 9 [2019-12-07 18:52:05,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:52:05,210 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-12-07 18:52:05,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 18:52:05,211 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-12-07 18:52:05,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 18:52:05,212 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:52:05,212 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:52:05,213 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:52:05,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:52:05,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1343664860, now seen corresponding path program 1 times [2019-12-07 18:52:05,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:52:05,213 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156922283] [2019-12-07 18:52:05,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:52:05,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:05,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:05,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:05,292 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 18:52:05,292 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156922283] [2019-12-07 18:52:05,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:52:05,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 18:52:05,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155206309] [2019-12-07 18:52:05,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 18:52:05,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:52:05,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 18:52:05,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:52:05,295 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 5 states. [2019-12-07 18:52:05,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:52:05,307 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2019-12-07 18:52:05,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 18:52:05,307 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-12-07 18:52:05,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:52:05,308 INFO L225 Difference]: With dead ends: 28 [2019-12-07 18:52:05,308 INFO L226 Difference]: Without dead ends: 24 [2019-12-07 18:52:05,309 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:52:05,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-12-07 18:52:05,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2019-12-07 18:52:05,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 18:52:05,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-12-07 18:52:05,312 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 16 [2019-12-07 18:52:05,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:52:05,313 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-12-07 18:52:05,313 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 18:52:05,313 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-12-07 18:52:05,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 18:52:05,313 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:52:05,313 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:52:05,314 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:52:05,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:52:05,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1372294011, now seen corresponding path program 1 times [2019-12-07 18:52:05,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:52:05,314 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453842939] [2019-12-07 18:52:05,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:52:05,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:05,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:05,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:05,398 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 18:52:05,398 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453842939] [2019-12-07 18:52:05,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:52:05,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-12-07 18:52:05,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261922705] [2019-12-07 18:52:05,399 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 18:52:05,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:52:05,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 18:52:05,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-12-07 18:52:05,399 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 8 states. [2019-12-07 18:52:05,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:52:05,433 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2019-12-07 18:52:05,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 18:52:05,434 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2019-12-07 18:52:05,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:52:05,434 INFO L225 Difference]: With dead ends: 44 [2019-12-07 18:52:05,434 INFO L226 Difference]: Without dead ends: 28 [2019-12-07 18:52:05,435 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-12-07 18:52:05,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-07 18:52:05,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-12-07 18:52:05,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 18:52:05,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-12-07 18:52:05,439 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2019-12-07 18:52:05,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:52:05,439 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-12-07 18:52:05,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 18:52:05,439 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-12-07 18:52:05,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-07 18:52:05,440 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:52:05,440 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:52:05,440 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:52:05,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:52:05,441 INFO L82 PathProgramCache]: Analyzing trace with hash -971845561, now seen corresponding path program 1 times [2019-12-07 18:52:05,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:52:05,441 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396686470] [2019-12-07 18:52:05,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:52:05,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:05,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:05,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:05,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:05,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 18:52:05,510 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396686470] [2019-12-07 18:52:05,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:52:05,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 18:52:05,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174343006] [2019-12-07 18:52:05,511 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 18:52:05,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:52:05,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 18:52:05,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:52:05,511 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2019-12-07 18:52:05,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:52:05,524 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2019-12-07 18:52:05,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 18:52:05,524 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-12-07 18:52:05,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:52:05,525 INFO L225 Difference]: With dead ends: 46 [2019-12-07 18:52:05,525 INFO L226 Difference]: Without dead ends: 32 [2019-12-07 18:52:05,526 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:52:05,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-12-07 18:52:05,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-12-07 18:52:05,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-07 18:52:05,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-12-07 18:52:05,530 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 23 [2019-12-07 18:52:05,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:52:05,530 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-12-07 18:52:05,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 18:52:05,530 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-12-07 18:52:05,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-07 18:52:05,531 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:52:05,531 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:52:05,531 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:52:05,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:52:05,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1168359066, now seen corresponding path program 1 times [2019-12-07 18:52:05,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:52:05,532 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467418148] [2019-12-07 18:52:05,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:52:05,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:05,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:05,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:05,655 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 18:52:05,655 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467418148] [2019-12-07 18:52:05,655 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172243656] [2019-12-07 18:52:05,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7057edff-96fb-493a-b896-57c139a1a994/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 18:52:05,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:05,681 INFO L264 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-07 18:52:05,687 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:52:05,742 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 18:52:05,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:52:05,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-07 18:52:05,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513554499] [2019-12-07 18:52:05,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 18:52:05,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:52:05,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 18:52:05,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-12-07 18:52:05,744 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 12 states. [2019-12-07 18:52:05,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:52:05,805 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2019-12-07 18:52:05,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 18:52:05,805 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2019-12-07 18:52:05,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:52:05,806 INFO L225 Difference]: With dead ends: 60 [2019-12-07 18:52:05,806 INFO L226 Difference]: Without dead ends: 40 [2019-12-07 18:52:05,807 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2019-12-07 18:52:05,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-12-07 18:52:05,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2019-12-07 18:52:05,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-07 18:52:05,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-12-07 18:52:05,814 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 23 [2019-12-07 18:52:05,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:52:05,814 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-12-07 18:52:05,814 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 18:52:05,814 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-12-07 18:52:05,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-07 18:52:05,815 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:52:05,816 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:52:06,016 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:52:06,017 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:52:06,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:52:06,017 INFO L82 PathProgramCache]: Analyzing trace with hash -222974932, now seen corresponding path program 1 times [2019-12-07 18:52:06,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:52:06,018 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810491113] [2019-12-07 18:52:06,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:52:06,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:06,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:06,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:06,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:06,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:06,218 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-07 18:52:06,218 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810491113] [2019-12-07 18:52:06,218 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921542390] [2019-12-07 18:52:06,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7057edff-96fb-493a-b896-57c139a1a994/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 18:52:06,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:06,240 INFO L264 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 26 conjunts are in the unsatisfiable core [2019-12-07 18:52:06,242 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:52:06,280 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-07 18:52:06,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:52:06,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-12-07 18:52:06,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724171846] [2019-12-07 18:52:06,281 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-07 18:52:06,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:52:06,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-07 18:52:06,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2019-12-07 18:52:06,282 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 15 states. [2019-12-07 18:52:06,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:52:06,379 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2019-12-07 18:52:06,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-07 18:52:06,379 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2019-12-07 18:52:06,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:52:06,380 INFO L225 Difference]: With dead ends: 70 [2019-12-07 18:52:06,380 INFO L226 Difference]: Without dead ends: 50 [2019-12-07 18:52:06,381 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2019-12-07 18:52:06,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-07 18:52:06,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2019-12-07 18:52:06,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-07 18:52:06,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-12-07 18:52:06,386 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 30 [2019-12-07 18:52:06,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:52:06,386 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-12-07 18:52:06,386 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-07 18:52:06,386 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-12-07 18:52:06,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-12-07 18:52:06,387 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:52:06,387 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:52:06,588 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:52:06,588 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:52:06,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:52:06,589 INFO L82 PathProgramCache]: Analyzing trace with hash -141607649, now seen corresponding path program 2 times [2019-12-07 18:52:06,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:52:06,589 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853806192] [2019-12-07 18:52:06,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:52:06,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:06,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:06,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:06,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:06,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:06,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:06,864 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-07 18:52:06,864 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853806192] [2019-12-07 18:52:06,864 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080742009] [2019-12-07 18:52:06,865 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7057edff-96fb-493a-b896-57c139a1a994/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 18:52:06,889 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:52:06,889 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:52:06,890 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 32 conjunts are in the unsatisfiable core [2019-12-07 18:52:06,892 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:52:06,920 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-07 18:52:06,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:52:06,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-12-07 18:52:06,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290645689] [2019-12-07 18:52:06,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-07 18:52:06,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:52:06,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-07 18:52:06,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2019-12-07 18:52:06,921 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 15 states. [2019-12-07 18:52:07,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:52:07,009 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2019-12-07 18:52:07,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-07 18:52:07,009 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2019-12-07 18:52:07,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:52:07,010 INFO L225 Difference]: With dead ends: 74 [2019-12-07 18:52:07,010 INFO L226 Difference]: Without dead ends: 56 [2019-12-07 18:52:07,011 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2019-12-07 18:52:07,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-12-07 18:52:07,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2019-12-07 18:52:07,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-07 18:52:07,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-12-07 18:52:07,016 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 37 [2019-12-07 18:52:07,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:52:07,016 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-12-07 18:52:07,016 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-07 18:52:07,016 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-12-07 18:52:07,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-07 18:52:07,017 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:52:07,017 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:52:07,217 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:52:07,218 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:52:07,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:52:07,219 INFO L82 PathProgramCache]: Analyzing trace with hash -90623267, now seen corresponding path program 2 times [2019-12-07 18:52:07,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:52:07,219 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605527661] [2019-12-07 18:52:07,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:52:07,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:07,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:07,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:07,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:07,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:07,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:07,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:52:07,472 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-12-07 18:52:07,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605527661] [2019-12-07 18:52:07,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877873328] [2019-12-07 18:52:07,472 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7057edff-96fb-493a-b896-57c139a1a994/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:52:07,494 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-12-07 18:52:07,494 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:52:07,495 INFO L264 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 18:52:07,497 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:52:07,549 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-12-07 18:52:07,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 18:52:07,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2019-12-07 18:52:07,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249396301] [2019-12-07 18:52:07,550 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 18:52:07,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:52:07,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 18:52:07,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2019-12-07 18:52:07,550 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 5 states. [2019-12-07 18:52:07,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:52:07,557 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2019-12-07 18:52:07,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 18:52:07,557 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2019-12-07 18:52:07,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:52:07,558 INFO L225 Difference]: With dead ends: 50 [2019-12-07 18:52:07,558 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 18:52:07,559 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2019-12-07 18:52:07,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 18:52:07,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 18:52:07,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 18:52:07,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 18:52:07,559 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 44 [2019-12-07 18:52:07,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:52:07,559 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 18:52:07,559 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 18:52:07,560 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 18:52:07,560 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 18:52:07,760 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:52:07,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-12-07 18:52:07,772 INFO L246 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2019-12-07 18:52:07,772 INFO L249 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2019-12-07 18:52:07,772 INFO L246 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2019-12-07 18:52:07,772 INFO L246 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2019-12-07 18:52:07,772 INFO L246 CegarLoopResult]: For program point id2EXIT(lines 14 19) no Hoare annotation was computed. [2019-12-07 18:52:07,773 INFO L249 CegarLoopResult]: At program point id2ENTRY(lines 14 19) the Hoare annotation is: true [2019-12-07 18:52:07,773 INFO L246 CegarLoopResult]: For program point id2FINAL(lines 14 19) no Hoare annotation was computed. [2019-12-07 18:52:07,773 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-12-07 18:52:07,773 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-12-07 18:52:07,773 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-12-07 18:52:07,773 INFO L246 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2019-12-07 18:52:07,773 INFO L246 CegarLoopResult]: For program point L24(lines 24 26) no Hoare annotation was computed. [2019-12-07 18:52:07,773 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) no Hoare annotation was computed. [2019-12-07 18:52:07,773 INFO L249 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2019-12-07 18:52:07,774 INFO L246 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2019-12-07 18:52:07,774 INFO L246 CegarLoopResult]: For program point L21(lines 21 27) no Hoare annotation was computed. [2019-12-07 18:52:07,774 INFO L246 CegarLoopResult]: For program point idFINAL(lines 7 12) no Hoare annotation was computed. [2019-12-07 18:52:07,774 INFO L246 CegarLoopResult]: For program point idEXIT(lines 7 12) no Hoare annotation was computed. [2019-12-07 18:52:07,774 INFO L246 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2019-12-07 18:52:07,774 INFO L249 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: true [2019-12-07 18:52:07,774 INFO L246 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2019-12-07 18:52:07,774 INFO L246 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2019-12-07 18:52:07,774 INFO L249 CegarLoopResult]: At program point idENTRY(lines 7 12) the Hoare annotation is: true [2019-12-07 18:52:07,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 06:52:07 BoogieIcfgContainer [2019-12-07 18:52:07,778 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 18:52:07,779 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 18:52:07,779 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 18:52:07,779 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 18:52:07,779 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:52:04" (3/4) ... [2019-12-07 18:52:07,782 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 18:52:07,787 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id2 [2019-12-07 18:52:07,787 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2019-12-07 18:52:07,791 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-12-07 18:52:07,791 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-12-07 18:52:07,823 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_7057edff-96fb-493a-b896-57c139a1a994/bin/uautomizer/witness.graphml [2019-12-07 18:52:07,823 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 18:52:07,825 INFO L168 Benchmark]: Toolchain (without parser) took 3261.08 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 95.9 MB). Free memory was 945.2 MB in the beginning and 965.0 MB in the end (delta: -19.8 MB). Peak memory consumption was 76.1 MB. Max. memory is 11.5 GB. [2019-12-07 18:52:07,825 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:52:07,826 INFO L168 Benchmark]: CACSL2BoogieTranslator took 176.11 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 95.9 MB). Free memory was 945.2 MB in the beginning and 1.1 GB in the end (delta: -145.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-12-07 18:52:07,826 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.24 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 18:52:07,826 INFO L168 Benchmark]: Boogie Preprocessor took 10.16 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 18:52:07,827 INFO L168 Benchmark]: RCFGBuilder took 141.84 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: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. [2019-12-07 18:52:07,827 INFO L168 Benchmark]: TraceAbstraction took 2865.93 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 971.9 MB in the end (delta: 102.4 MB). Peak memory consumption was 102.4 MB. Max. memory is 11.5 GB. [2019-12-07 18:52:07,828 INFO L168 Benchmark]: Witness Printer took 44.54 ms. Allocated memory is still 1.1 GB. Free memory was 971.9 MB in the beginning and 965.0 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. [2019-12-07 18:52:07,830 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 176.11 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 95.9 MB). Free memory was 945.2 MB in the beginning and 1.1 GB in the end (delta: -145.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 19.24 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 10.16 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 141.84 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: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2865.93 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 971.9 MB in the end (delta: 102.4 MB). Peak memory consumption was 102.4 MB. Max. memory is 11.5 GB. * Witness Printer took 44.54 ms. Allocated memory is still 1.1 GB. Free memory was 971.9 MB in the beginning and 965.0 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 23 locations, 1 error locations. Result: SAFE, OverallTime: 2.8s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 206 SDtfs, 27 SDslu, 1249 SDs, 0 SdLazy, 350 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 271 GetRequests, 190 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 30 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 7 PreInvPairs, 7 NumberOfFragments, 5 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 332 NumberOfCodeBlocks, 304 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 320 ConstructedInterpolants, 0 QuantifiedInterpolants, 32728 SizeOfPredicates, 13 NumberOfNonLiveVariables, 238 ConjunctsInSsa, 86 ConjunctsInUnsatCore, 12 InterpolantComputations, 5 PerfectInterpolantSequences, 110/150 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...