./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id2_i5_o5-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id2_i5_o5-1.c -s /tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 59c5766d3cddc0d41e2678bb5221cccc60217431 ..................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id2_i5_o5-1.c -s /tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 59c5766d3cddc0d41e2678bb5221cccc60217431 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 11:25:34,497 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:25:34,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:25:34,508 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:25:34,509 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:25:34,510 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:25:34,511 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:25:34,513 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:25:34,515 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:25:34,518 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:25:34,520 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:25:34,521 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:25:34,526 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:25:34,528 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:25:34,530 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:25:34,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:25:34,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:25:34,535 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:25:34,536 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:25:34,539 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:25:34,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:25:34,543 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:25:34,545 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:25:34,546 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:25:34,547 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:25:34,548 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:25:34,548 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:25:34,548 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:25:34,549 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:25:34,549 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:25:34,549 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:25:34,550 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:25:34,550 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:25:34,551 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:25:34,554 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:25:34,554 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:25:34,555 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:25:34,555 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:25:34,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:25:34,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:25:34,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:25:34,560 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-10-22 11:25:34,571 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:25:34,579 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:25:34,580 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:25:34,580 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:25:34,580 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:25:34,580 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:25:34,581 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:25:34,581 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:25:34,581 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:25:34,581 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:25:34,581 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:25:34,581 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:25:34,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:25:34,582 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:25:34,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:25:34,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:25:34,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:25:34,583 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:25:34,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:25:34,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:25:34,583 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:25:34,583 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:25:34,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:25:34,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:25:34,585 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:25:34,585 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:25:34,585 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:25:34,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:25:34,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:25:34,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:25:34,586 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:25:34,586 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:25:34,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:25:34,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:25:34,586 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:25:34,587 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan 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 -> Taipan 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 -> 59c5766d3cddc0d41e2678bb5221cccc60217431 [2019-10-22 11:25:34,620 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:25:34,631 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:25:34,635 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:25:34,636 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:25:34,637 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:25:34,637 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan/../../sv-benchmarks/c/recursive-simple/id2_i5_o5-1.c [2019-10-22 11:25:34,683 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan/data/e65dec172/534eb416451c4c759ce5462cee27992f/FLAGec48efc1d [2019-10-22 11:25:35,071 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:25:35,072 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/sv-benchmarks/c/recursive-simple/id2_i5_o5-1.c [2019-10-22 11:25:35,077 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan/data/e65dec172/534eb416451c4c759ce5462cee27992f/FLAGec48efc1d [2019-10-22 11:25:35,480 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan/data/e65dec172/534eb416451c4c759ce5462cee27992f [2019-10-22 11:25:35,483 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:25:35,484 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:25:35,485 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:25:35,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:25:35,488 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:25:35,489 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:25:35" (1/1) ... [2019-10-22 11:25:35,493 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f94bb49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:35, skipping insertion in model container [2019-10-22 11:25:35,493 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:25:35" (1/1) ... [2019-10-22 11:25:35,500 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:25:35,514 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:25:35,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:25:35,678 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:25:35,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:25:35,767 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:25:35,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:35 WrapperNode [2019-10-22 11:25:35,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:25:35,769 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:25:35,769 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:25:35,769 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:25:35,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:35" (1/1) ... [2019-10-22 11:25:35,783 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:35" (1/1) ... [2019-10-22 11:25:35,799 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:25:35,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:25:35,800 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:25:35,800 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:25:35,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:35" (1/1) ... [2019-10-22 11:25:35,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:35" (1/1) ... [2019-10-22 11:25:35,810 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:35" (1/1) ... [2019-10-22 11:25:35,810 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:35" (1/1) ... [2019-10-22 11:25:35,812 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:35" (1/1) ... [2019-10-22 11:25:35,814 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:35" (1/1) ... [2019-10-22 11:25:35,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:35" (1/1) ... [2019-10-22 11:25:35,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:25:35,816 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:25:35,817 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:25:35,817 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:25:35,818 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:35" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan/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 [2019-10-22 11:25:35,878 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2019-10-22 11:25:35,879 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2019-10-22 11:25:35,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:25:35,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:25:35,880 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-10-22 11:25:35,881 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-10-22 11:25:36,037 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:25:36,038 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 11:25:36,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:36 BoogieIcfgContainer [2019-10-22 11:25:36,039 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:25:36,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:25:36,041 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:25:36,044 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:25:36,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:25:35" (1/3) ... [2019-10-22 11:25:36,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a3e5608 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:25:36, skipping insertion in model container [2019-10-22 11:25:36,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:35" (2/3) ... [2019-10-22 11:25:36,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a3e5608 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:25:36, skipping insertion in model container [2019-10-22 11:25:36,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:36" (3/3) ... [2019-10-22 11:25:36,047 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_i5_o5-1.c [2019-10-22 11:25:36,056 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:25:36,063 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:25:36,074 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:25:36,097 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:25:36,097 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:25:36,097 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:25:36,097 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:25:36,098 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:25:36,098 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:25:36,098 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:25:36,098 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:25:36,114 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-22 11:25:36,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 11:25:36,120 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:36,120 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:36,122 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:36,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:36,127 INFO L82 PathProgramCache]: Analyzing trace with hash 2105267373, now seen corresponding path program 1 times [2019-10-22 11:25:36,134 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:25:36,134 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13240908] [2019-10-22 11:25:36,134 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:36,134 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:36,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:25:36,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:36,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:25:36,279 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13240908] [2019-10-22 11:25:36,280 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:25:36,281 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-22 11:25:36,281 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360430953] [2019-10-22 11:25:36,285 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 11:25:36,286 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:25:36,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 11:25:36,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-22 11:25:36,301 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 7 states. [2019-10-22 11:25:36,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:36,453 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2019-10-22 11:25:36,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 11:25:36,454 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-10-22 11:25:36,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:36,463 INFO L225 Difference]: With dead ends: 33 [2019-10-22 11:25:36,463 INFO L226 Difference]: Without dead ends: 20 [2019-10-22 11:25:36,466 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-22 11:25:36,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-22 11:25:36,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-22 11:25:36,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-22 11:25:36,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-10-22 11:25:36,518 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 9 [2019-10-22 11:25:36,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:36,519 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-10-22 11:25:36,519 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 11:25:36,519 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-10-22 11:25:36,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-22 11:25:36,521 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:36,521 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:36,521 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:36,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:36,522 INFO L82 PathProgramCache]: Analyzing trace with hash -131148366, now seen corresponding path program 1 times [2019-10-22 11:25:36,522 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:25:36,522 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759148226] [2019-10-22 11:25:36,522 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:36,522 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:36,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:25:36,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:36,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:25:36,694 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759148226] [2019-10-22 11:25:36,694 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:25:36,694 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-10-22 11:25:36,695 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793327695] [2019-10-22 11:25:36,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-22 11:25:36,696 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:25:36,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-22 11:25:36,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-10-22 11:25:36,697 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 10 states. [2019-10-22 11:25:36,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:36,879 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2019-10-22 11:25:36,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-22 11:25:36,880 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-10-22 11:25:36,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:36,881 INFO L225 Difference]: With dead ends: 29 [2019-10-22 11:25:36,881 INFO L226 Difference]: Without dead ends: 25 [2019-10-22 11:25:36,882 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-10-22 11:25:36,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-22 11:25:36,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2019-10-22 11:25:36,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-22 11:25:36,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-10-22 11:25:36,889 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2019-10-22 11:25:36,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:36,889 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-10-22 11:25:36,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-22 11:25:36,889 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-10-22 11:25:36,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-22 11:25:36,890 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:36,891 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:36,891 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:36,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:36,891 INFO L82 PathProgramCache]: Analyzing trace with hash -132605643, now seen corresponding path program 1 times [2019-10-22 11:25:36,891 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:25:36,891 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51724517] [2019-10-22 11:25:36,892 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:36,892 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:36,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:25:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:37,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 11:25:37,066 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51724517] [2019-10-22 11:25:37,066 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42889929] [2019-10-22 11:25:37,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan/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 [2019-10-22 11:25:37,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:37,122 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 11:25:37,129 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 11:25:37,230 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:37,472 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:37,537 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:37,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 11:25:37,593 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1925646716] [2019-10-22 11:25:37,602 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 22 [2019-10-22 11:25:37,646 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-10-22 11:25:37,646 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-22 11:25:37,920 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:25:37,920 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: inappropriate decl info IMPLEMENTATION at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Boogie2SmtSymbolTable.getBoogieVar(Boogie2SmtSymbolTable.java:222) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.getBoogieVar(NonrelationalStatementProcessor.java:348) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.handleHavocStatement(NonrelationalStatementProcessor.java:325) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.processStatement(NonrelationalStatementProcessor.java:159) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.process(NonrelationalStatementProcessor.java:138) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.process(NonrelationalStatementProcessor.java:107) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.handleInternalTransition(NonrelationalPostOperator.java:422) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.handleInternalTransition(NonrelationalPostOperator.java:413) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.apply(NonrelationalPostOperator.java:140) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.apply(NonrelationalPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.applyInternally(CompoundDomainPostOperator.java:306) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.apply(CompoundDomainPostOperator.java:131) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.apply(CompoundDomainPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormanCachedPostOperation.restoreOriginalStateVariables(PoormanCachedPostOperation.java:322) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.applyPost(PoormansAbstractPostOperator.java:217) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.apply(PoormansAbstractPostOperator.java:120) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.apply(PoormansAbstractPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.lambda$17(DisjunctiveAbstractState.java:323) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.mapCollection(DisjunctiveAbstractState.java:519) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.apply(DisjunctiveAbstractState.java:323) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateAbstractPost(FixpointEngine.java:249) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateFixpoint(FixpointEngine.java:134) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.run(FixpointEngine.java:105) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.tool.AbstractInterpreter.runWithoutTimeoutAndResults(AbstractInterpreter.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.generateFixpoints(CegarAbsIntRunner.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.(CegarAbsIntRunner.java:158) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAbstractInterpretation.getOrConstructRunner(IpTcStrategyModuleAbstractInterpretation.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAbstractInterpretation.construct(IpTcStrategyModuleAbstractInterpretation.java:81) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:299) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-10-22 11:25:37,926 INFO L168 Benchmark]: Toolchain (without parser) took 2441.95 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.9 MB). Free memory was 948.5 MB in the beginning and 963.1 MB in the end (delta: -14.6 MB). Peak memory consumption was 134.3 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:37,933 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 966.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:25:37,934 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.9 MB). Free memory was 947.1 MB in the beginning and 1.1 GB in the end (delta: -201.4 MB). Peak memory consumption was 20.3 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:37,935 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.43 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:37,935 INFO L168 Benchmark]: Boogie Preprocessor took 16.75 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:37,936 INFO L168 Benchmark]: RCFGBuilder took 222.99 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 26.7 MB). Peak memory consumption was 26.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:37,936 INFO L168 Benchmark]: TraceAbstraction took 1884.08 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 963.1 MB in the end (delta: 155.4 MB). Peak memory consumption was 155.4 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:37,939 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 966.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 283.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.9 MB). Free memory was 947.1 MB in the beginning and 1.1 GB in the end (delta: -201.4 MB). Peak memory consumption was 20.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 30.43 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.75 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 222.99 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 26.7 MB). Peak memory consumption was 26.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1884.08 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 963.1 MB in the end (delta: 155.4 MB). Peak memory consumption was 155.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: inappropriate decl info IMPLEMENTATION de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: inappropriate decl info IMPLEMENTATION: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Boogie2SmtSymbolTable.getBoogieVar(Boogie2SmtSymbolTable.java:222) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-cad4683 [2019-10-22 11:25:40,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:25:40,183 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:25:40,194 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:25:40,194 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:25:40,195 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:25:40,196 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:25:40,198 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:25:40,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:25:40,200 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:25:40,201 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:25:40,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:25:40,202 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:25:40,203 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:25:40,204 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:25:40,205 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:25:40,206 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:25:40,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:25:40,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:25:40,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:25:40,212 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:25:40,213 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:25:40,214 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:25:40,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:25:40,217 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:25:40,217 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:25:40,217 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:25:40,218 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:25:40,219 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:25:40,220 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:25:40,220 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:25:40,220 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:25:40,221 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:25:40,222 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:25:40,223 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:25:40,223 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:25:40,224 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:25:40,224 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:25:40,224 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:25:40,227 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:25:40,228 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:25:40,229 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-10-22 11:25:40,250 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:25:40,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:25:40,254 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:25:40,254 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:25:40,254 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:25:40,255 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:25:40,255 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:25:40,255 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:25:40,255 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:25:40,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:25:40,256 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:25:40,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:25:40,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:25:40,256 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:25:40,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:25:40,257 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:25:40,257 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-10-22 11:25:40,257 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-10-22 11:25:40,257 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:25:40,257 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:25:40,257 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 11:25:40,258 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:25:40,258 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:25:40,258 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:25:40,258 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:25:40,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:25:40,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:25:40,259 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:25:40,259 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:25:40,259 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:25:40,260 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-10-22 11:25:40,261 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-10-22 11:25:40,261 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:25:40,261 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:25:40,261 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan 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 -> Taipan 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 -> 59c5766d3cddc0d41e2678bb5221cccc60217431 [2019-10-22 11:25:40,307 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:25:40,318 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:25:40,325 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:25:40,327 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:25:40,327 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:25:40,328 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan/../../sv-benchmarks/c/recursive-simple/id2_i5_o5-1.c [2019-10-22 11:25:40,376 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan/data/efeb51fa1/a075e2cd315c401b836629bb90e83693/FLAGc0c6afe35 [2019-10-22 11:25:40,753 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:25:40,753 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/sv-benchmarks/c/recursive-simple/id2_i5_o5-1.c [2019-10-22 11:25:40,758 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan/data/efeb51fa1/a075e2cd315c401b836629bb90e83693/FLAGc0c6afe35 [2019-10-22 11:25:40,773 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan/data/efeb51fa1/a075e2cd315c401b836629bb90e83693 [2019-10-22 11:25:40,777 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:25:40,778 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:25:40,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:25:40,779 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:25:40,782 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:25:40,783 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:25:40" (1/1) ... [2019-10-22 11:25:40,785 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2875429f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:40, skipping insertion in model container [2019-10-22 11:25:40,785 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:25:40" (1/1) ... [2019-10-22 11:25:40,792 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:25:40,807 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:25:40,981 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:25:40,986 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:25:41,005 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:25:41,022 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:25:41,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:41 WrapperNode [2019-10-22 11:25:41,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:25:41,024 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:25:41,024 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:25:41,024 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:25:41,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:41" (1/1) ... [2019-10-22 11:25:41,039 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:41" (1/1) ... [2019-10-22 11:25:41,162 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:25:41,163 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:25:41,163 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:25:41,163 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:25:41,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:41" (1/1) ... [2019-10-22 11:25:41,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:41" (1/1) ... [2019-10-22 11:25:41,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:41" (1/1) ... [2019-10-22 11:25:41,176 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:41" (1/1) ... [2019-10-22 11:25:41,181 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:41" (1/1) ... [2019-10-22 11:25:41,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:41" (1/1) ... [2019-10-22 11:25:41,185 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:41" (1/1) ... [2019-10-22 11:25:41,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:25:41,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:25:41,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:25:41,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:25:41,190 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:41" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan/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 [2019-10-22 11:25:41,252 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2019-10-22 11:25:41,252 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2019-10-22 11:25:41,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:25:41,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:25:41,252 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-10-22 11:25:41,252 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-10-22 11:25:41,418 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:25:41,418 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 11:25:41,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:41 BoogieIcfgContainer [2019-10-22 11:25:41,420 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:25:41,421 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:25:41,421 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:25:41,424 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:25:41,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:25:40" (1/3) ... [2019-10-22 11:25:41,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@600f85d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:25:41, skipping insertion in model container [2019-10-22 11:25:41,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:41" (2/3) ... [2019-10-22 11:25:41,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@600f85d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:25:41, skipping insertion in model container [2019-10-22 11:25:41,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:41" (3/3) ... [2019-10-22 11:25:41,428 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_i5_o5-1.c [2019-10-22 11:25:41,438 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:25:41,445 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:25:41,457 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:25:41,481 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:25:41,482 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:25:41,482 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:25:41,482 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:25:41,482 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:25:41,482 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:25:41,483 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:25:41,483 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:25:41,501 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-22 11:25:41,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 11:25:41,507 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:41,508 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:41,510 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:41,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:41,515 INFO L82 PathProgramCache]: Analyzing trace with hash 2105267373, now seen corresponding path program 1 times [2019-10-22 11:25:41,525 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:41,526 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1756953633] [2019-10-22 11:25:41,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:41,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:41,587 INFO L256 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 11:25:41,594 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:41,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:25:41,757 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:41,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:25:41,842 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1756953633] [2019-10-22 11:25:41,843 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:25:41,843 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-10-22 11:25:41,844 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089837089] [2019-10-22 11:25:41,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 11:25:41,849 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:25:41,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 11:25:41,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-22 11:25:41,865 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 7 states. [2019-10-22 11:25:41,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:41,970 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-10-22 11:25:41,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 11:25:41,972 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-10-22 11:25:41,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:41,980 INFO L225 Difference]: With dead ends: 30 [2019-10-22 11:25:41,980 INFO L226 Difference]: Without dead ends: 20 [2019-10-22 11:25:41,984 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-22 11:25:42,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-22 11:25:42,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-22 11:25:42,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-22 11:25:42,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-10-22 11:25:42,024 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 9 [2019-10-22 11:25:42,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:42,025 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-10-22 11:25:42,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 11:25:42,025 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-10-22 11:25:42,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-22 11:25:42,027 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:42,027 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:42,228 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:42,228 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:42,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:42,228 INFO L82 PathProgramCache]: Analyzing trace with hash -131148366, now seen corresponding path program 1 times [2019-10-22 11:25:42,229 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:42,229 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1269334248] [2019-10-22 11:25:42,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:42,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:25:42,268 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:42,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:25:42,342 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:42,522 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:42,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:25:42,558 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1269334248] [2019-10-22 11:25:42,559 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:25:42,559 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2019-10-22 11:25:42,559 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383340019] [2019-10-22 11:25:42,561 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-22 11:25:42,561 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:25:42,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-22 11:25:42,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-22 11:25:42,562 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 10 states. [2019-10-22 11:25:42,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:42,692 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2019-10-22 11:25:42,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 11:25:42,693 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-10-22 11:25:42,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:42,694 INFO L225 Difference]: With dead ends: 29 [2019-10-22 11:25:42,694 INFO L226 Difference]: Without dead ends: 25 [2019-10-22 11:25:42,695 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-10-22 11:25:42,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-22 11:25:42,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2019-10-22 11:25:42,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-22 11:25:42,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-10-22 11:25:42,704 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2019-10-22 11:25:42,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:42,704 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-10-22 11:25:42,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-22 11:25:42,705 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-10-22 11:25:42,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-22 11:25:42,705 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:42,706 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:42,906 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:42,907 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:42,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:42,907 INFO L82 PathProgramCache]: Analyzing trace with hash -132605643, now seen corresponding path program 1 times [2019-10-22 11:25:42,908 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:42,908 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [875877978] [2019-10-22 11:25:42,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:42,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:42,957 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 11:25:42,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:43,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 11:25:43,026 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:43,275 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:43,348 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:43,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 11:25:43,376 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [875877978] [2019-10-22 11:25:43,376 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381796370] [2019-10-22 11:25:43,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan/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 [2019-10-22 11:25:43,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:43,418 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 11:25:43,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 11:25:43,442 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:43,657 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:43,705 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:43,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 11:25:43,711 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:25:43,711 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 9] total 12 [2019-10-22 11:25:43,712 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148585171] [2019-10-22 11:25:43,712 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-22 11:25:43,713 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:25:43,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-22 11:25:43,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-10-22 11:25:43,714 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 12 states. [2019-10-22 11:25:43,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:43,855 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2019-10-22 11:25:43,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 11:25:43,856 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2019-10-22 11:25:43,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:43,857 INFO L225 Difference]: With dead ends: 35 [2019-10-22 11:25:43,857 INFO L226 Difference]: Without dead ends: 31 [2019-10-22 11:25:43,857 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2019-10-22 11:25:43,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-22 11:25:43,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2019-10-22 11:25:43,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-22 11:25:43,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-10-22 11:25:43,863 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2019-10-22 11:25:43,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:43,864 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-10-22 11:25:43,864 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-22 11:25:43,864 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-10-22 11:25:43,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-22 11:25:43,865 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:43,865 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:44,266 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:25:44,267 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:44,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:44,267 INFO L82 PathProgramCache]: Analyzing trace with hash -614490246, now seen corresponding path program 1 times [2019-10-22 11:25:44,268 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:44,268 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1645623673] [2019-10-22 11:25:44,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:44,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:44,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 11:25:44,323 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:44,406 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-22 11:25:44,406 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:44,651 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:44,719 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:44,763 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:44,785 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 11:25:44,786 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1645623673] [2019-10-22 11:25:44,786 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577824008] [2019-10-22 11:25:44,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:25:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:44,819 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 11:25:44,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:44,827 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-22 11:25:44,827 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:45,029 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:45,078 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:45,099 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:45,104 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 11:25:45,104 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:25:45,105 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9, 11] total 14 [2019-10-22 11:25:45,105 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929980577] [2019-10-22 11:25:45,105 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-22 11:25:45,106 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:25:45,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-22 11:25:45,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2019-10-22 11:25:45,106 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 14 states. [2019-10-22 11:25:45,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:45,237 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2019-10-22 11:25:45,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 11:25:45,238 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2019-10-22 11:25:45,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:45,238 INFO L225 Difference]: With dead ends: 41 [2019-10-22 11:25:45,239 INFO L226 Difference]: Without dead ends: 37 [2019-10-22 11:25:45,239 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2019-10-22 11:25:45,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-22 11:25:45,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2019-10-22 11:25:45,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-22 11:25:45,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-10-22 11:25:45,244 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 27 [2019-10-22 11:25:45,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:45,245 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-10-22 11:25:45,245 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-22 11:25:45,245 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-10-22 11:25:45,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-22 11:25:45,246 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:45,246 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:45,646 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:25:45,647 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:45,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:45,647 INFO L82 PathProgramCache]: Analyzing trace with hash -2127867459, now seen corresponding path program 2 times [2019-10-22 11:25:45,648 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:45,648 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1448698462] [2019-10-22 11:25:45,648 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:45,693 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:25:45,694 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:25:45,696 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 11:25:45,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-22 11:25:45,779 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:46,017 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:46,103 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:46,157 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:46,207 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:46,228 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 11:25:46,228 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1448698462] [2019-10-22 11:25:46,228 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104496051] [2019-10-22 11:25:46,228 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:25:46,280 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:25:46,281 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:25:46,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 11:25:46,283 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-22 11:25:46,292 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:46,509 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:46,600 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:46,663 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:46,692 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:46,697 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 11:25:46,698 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:25:46,698 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 10, 13] total 16 [2019-10-22 11:25:46,698 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886449868] [2019-10-22 11:25:46,698 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-22 11:25:46,698 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:25:46,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-22 11:25:46,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2019-10-22 11:25:46,699 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 16 states. [2019-10-22 11:25:46,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:46,868 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2019-10-22 11:25:46,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-22 11:25:46,869 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2019-10-22 11:25:46,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:46,870 INFO L225 Difference]: With dead ends: 47 [2019-10-22 11:25:46,870 INFO L226 Difference]: Without dead ends: 43 [2019-10-22 11:25:46,870 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 110 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2019-10-22 11:25:46,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-22 11:25:46,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2019-10-22 11:25:46,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-22 11:25:46,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-10-22 11:25:46,877 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 33 [2019-10-22 11:25:46,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:46,878 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-10-22 11:25:46,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-22 11:25:46,878 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-10-22 11:25:46,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-22 11:25:46,879 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:46,879 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:47,280 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:47,280 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:47,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:47,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1002836670, now seen corresponding path program 2 times [2019-10-22 11:25:47,281 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:47,281 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1188030628] [2019-10-22 11:25:47,281 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:47,362 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:25:47,362 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2019-10-22 11:25:47,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:25:47,427 INFO L168 tionRefinementEngine]: Strategy WALRUS found a feasible trace [2019-10-22 11:25:47,427 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 11:25:47,628 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:47,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:25:47 BoogieIcfgContainer [2019-10-22 11:25:47,650 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:25:47,650 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:25:47,650 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:25:47,650 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:25:47,651 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:41" (3/4) ... [2019-10-22 11:25:47,653 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 11:25:47,694 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_47ea0742-f6ad-48be-9f6f-ae2ff02bd299/bin/utaipan/witness.graphml [2019-10-22 11:25:47,694 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:25:47,696 INFO L168 Benchmark]: Toolchain (without parser) took 6917.58 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 227.0 MB). Free memory was 952.3 MB in the beginning and 990.1 MB in the end (delta: -37.8 MB). Peak memory consumption was 189.2 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:47,697 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:25:47,697 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.20 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:47,697 INFO L168 Benchmark]: Boogie Procedure Inliner took 139.17 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 173.0 MB). Free memory was 941.6 MB in the beginning and 1.2 GB in the end (delta: -226.7 MB). Peak memory consumption was 12.2 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:47,698 INFO L168 Benchmark]: Boogie Preprocessor took 25.04 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:25:47,698 INFO L168 Benchmark]: RCFGBuilder took 231.65 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 20.9 MB). Peak memory consumption was 20.9 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:47,699 INFO L168 Benchmark]: TraceAbstraction took 6229.29 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 54.0 MB). Free memory was 1.1 GB in the beginning and 990.1 MB in the end (delta: 157.3 MB). Peak memory consumption was 211.3 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:47,699 INFO L168 Benchmark]: Witness Printer took 44.10 ms. Allocated memory is still 1.3 GB. Free memory is still 990.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:25:47,701 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 244.20 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 139.17 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 173.0 MB). Free memory was 941.6 MB in the beginning and 1.2 GB in the end (delta: -226.7 MB). Peak memory consumption was 12.2 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 25.04 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 231.65 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 20.9 MB). Peak memory consumption was 20.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6229.29 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 54.0 MB). Free memory was 1.1 GB in the beginning and 990.1 MB in the end (delta: 157.3 MB). Peak memory consumption was 211.3 MB. Max. memory is 11.5 GB. * Witness Printer took 44.10 ms. Allocated memory is still 1.3 GB. Free memory is still 990.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 21]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L18] int input = 5; [L19] CALL, EXPR id(input) VAL [\old(x)=5] [L8] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L9] CALL, EXPR id2(x-1) VAL [\old(x)=4] [L13] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L14] CALL, EXPR id(x-1) VAL [\old(x)=3] [L8] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L9] CALL, EXPR id2(x-1) VAL [\old(x)=2] [L13] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L14] CALL, EXPR id(x-1) VAL [\old(x)=1] [L8] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L9] CALL, EXPR id2(x-1) VAL [\old(x)=0] [L13] COND TRUE x==0 [L13] return 0; VAL [\old(x)=0, \result=0, x=0] [L9] RET, EXPR id2(x-1) VAL [\old(x)=1, id2(x-1)=0, x=1] [L9] return id2(x-1) + 1; [L14] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L14] return id(x-1) + 1; [L9] RET, EXPR id2(x-1) VAL [\old(x)=3, id2(x-1)=2, x=3] [L9] return id2(x-1) + 1; [L14] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L14] return id(x-1) + 1; [L9] RET, EXPR id2(x-1) VAL [\old(x)=5, id2(x-1)=4, x=5] [L9] return id2(x-1) + 1; [L19] RET, EXPR id(input) [L19] int result = id(input); [L20] COND TRUE result == 5 [L21] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 21 locations, 1 error locations. Result: UNSAFE, OverallTime: 6.1s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 87 SDtfs, 102 SDslu, 434 SDs, 0 SdLazy, 339 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 371 GetRequests, 299 SyntacticMatches, 8 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=5, 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, 26 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 225 NumberOfCodeBlocks, 225 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 356 ConstructedInterpolants, 0 QuantifiedInterpolants, 34256 SizeOfPredicates, 35 NumberOfNonLiveVariables, 264 ConjunctsInSsa, 70 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 48/136 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 incorrect! Received shutdown request...