./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_o10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_o10.c -s /tmp/vcloud-vcloud-master/worker/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/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 0c292d0c9d9c055df9398b3303a92d6621b60758 .................................................................................................................................................................................................................................................................................................. 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/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_o10.c -s /tmp/vcloud-vcloud-master/worker/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/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 0c292d0c9d9c055df9398b3303a92d6621b60758 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.24-6b5699a [2019-11-26 02:50:08,088 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:50:08,090 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:50:08,100 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:50:08,101 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:50:08,101 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:50:08,103 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:50:08,105 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:50:08,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:50:08,107 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:50:08,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:50:08,109 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:50:08,110 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:50:08,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:50:08,111 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:50:08,112 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:50:08,113 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:50:08,114 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:50:08,116 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:50:08,121 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:50:08,123 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:50:08,124 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:50:08,125 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:50:08,126 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:50:08,128 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:50:08,128 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:50:08,129 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:50:08,130 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:50:08,130 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:50:08,131 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:50:08,131 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:50:08,132 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:50:08,137 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:50:08,139 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:50:08,142 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:50:08,142 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:50:08,143 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:50:08,143 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:50:08,143 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:50:08,146 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:50:08,148 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:50:08,148 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-26 02:50:08,167 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:50:08,168 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:50:08,168 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:50:08,169 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:50:08,169 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:50:08,169 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:50:08,169 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:50:08,169 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:50:08,169 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:50:08,170 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:50:08,170 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:50:08,171 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:50:08,171 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:50:08,171 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:50:08,171 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:50:08,172 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:50:08,172 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:50:08,172 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:50:08,172 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:50:08,172 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:50:08,173 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:50:08,173 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:50:08,173 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:50:08,173 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:50:08,174 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:50:08,174 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:50:08,174 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:50:08,174 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:50:08,174 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:50:08,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:50:08,175 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:50:08,175 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:50:08,175 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:50:08,175 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:50:08,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:50:08,176 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:50:08,176 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:50:08,176 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/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/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 -> 0c292d0c9d9c055df9398b3303a92d6621b60758 [2019-11-26 02:50:08,326 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:50:08,336 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:50:08,338 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:50:08,340 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:50:08,340 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:50:08,341 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/bin/utaipan/../../sv-benchmarks/c/recursive-simple/id_o10.c [2019-11-26 02:50:08,389 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/bin/utaipan/data/034adee7f/7f6139a93e9f4efd848c3b5ea84eae4e/FLAGaf083b1f5 [2019-11-26 02:50:08,785 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:50:08,785 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/sv-benchmarks/c/recursive-simple/id_o10.c [2019-11-26 02:50:08,790 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/bin/utaipan/data/034adee7f/7f6139a93e9f4efd848c3b5ea84eae4e/FLAGaf083b1f5 [2019-11-26 02:50:08,804 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/bin/utaipan/data/034adee7f/7f6139a93e9f4efd848c3b5ea84eae4e [2019-11-26 02:50:08,806 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:50:08,808 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:50:08,811 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:50:08,817 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:50:08,820 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:50:08,821 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:50:08" (1/1) ... [2019-11-26 02:50:08,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5093f83e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:08, skipping insertion in model container [2019-11-26 02:50:08,824 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:50:08" (1/1) ... [2019-11-26 02:50:08,830 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:50:08,845 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:50:08,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:50:09,000 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:50:09,074 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:50:09,092 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:50:09,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:09 WrapperNode [2019-11-26 02:50:09,093 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:50:09,093 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:50:09,093 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:50:09,093 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:50:09,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:09" (1/1) ... [2019-11-26 02:50:09,105 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:09" (1/1) ... [2019-11-26 02:50:09,119 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:50:09,120 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:50:09,120 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:50:09,120 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:50:09,126 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:09" (1/1) ... [2019-11-26 02:50:09,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:09" (1/1) ... [2019-11-26 02:50:09,127 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:09" (1/1) ... [2019-11-26 02:50:09,127 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:09" (1/1) ... [2019-11-26 02:50:09,129 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:09" (1/1) ... [2019-11-26 02:50:09,130 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:09" (1/1) ... [2019-11-26 02:50:09,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:09" (1/1) ... [2019-11-26 02:50:09,132 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:50:09,132 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:50:09,132 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:50:09,132 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:50:09,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:09" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/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 [2019-11-26 02:50:09,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:50:09,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:50:09,180 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-11-26 02:50:09,181 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-11-26 02:50:09,341 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:50:09,341 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-26 02:50:09,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:50:09 BoogieIcfgContainer [2019-11-26 02:50:09,343 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:50:09,343 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:50:09,344 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:50:09,346 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:50:09,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:50:08" (1/3) ... [2019-11-26 02:50:09,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6342ff1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:50:09, skipping insertion in model container [2019-11-26 02:50:09,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:09" (2/3) ... [2019-11-26 02:50:09,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6342ff1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:50:09, skipping insertion in model container [2019-11-26 02:50:09,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:50:09" (3/3) ... [2019-11-26 02:50:09,351 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o10.c [2019-11-26 02:50:09,359 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:50:09,366 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:50:09,378 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:50:09,402 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:50:09,402 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:50:09,403 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:50:09,403 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:50:09,403 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:50:09,403 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:50:09,403 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:50:09,403 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:50:09,423 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2019-11-26 02:50:09,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-26 02:50:09,428 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:50:09,429 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:50:09,429 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:50:09,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:50:09,435 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-26 02:50:09,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:50:09,444 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209541536] [2019-11-26 02:50:09,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:50:09,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:50:09,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:50:09,691 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209541536] [2019-11-26 02:50:09,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:50:09,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-26 02:50:09,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502285021] [2019-11-26 02:50:09,709 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:50:09,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:50:09,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:50:09,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:50:09,733 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 5 states. [2019-11-26 02:50:09,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:50:09,795 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2019-11-26 02:50:09,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:50:09,796 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-26 02:50:09,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:50:09,805 INFO L225 Difference]: With dead ends: 24 [2019-11-26 02:50:09,805 INFO L226 Difference]: Without dead ends: 14 [2019-11-26 02:50:09,808 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:50:09,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-26 02:50:09,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-26 02:50:09,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-26 02:50:09,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-26 02:50:09,839 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-26 02:50:09,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:50:09,839 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-26 02:50:09,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:50:09,840 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-26 02:50:09,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-26 02:50:09,841 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:50:09,841 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:50:09,841 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:50:09,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:50:09,842 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-26 02:50:09,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:50:09,842 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973987548] [2019-11-26 02:50:09,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:50:09,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:50:09,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-26 02:50:09,990 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973987548] [2019-11-26 02:50:09,993 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485430513] [2019-11-26 02:50:09,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/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 [2019-11-26 02:50:10,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:50:10,040 INFO L255 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-26 02:50:10,045 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:50:10,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-26 02:50:10,097 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:50:10,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-26 02:50:10,269 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1266011495] [2019-11-26 02:50:10,303 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-11-26 02:50:10,303 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:50:10,308 FATAL L310 FreeRefinementEngine]: Exception during interpolant generation: IllegalArgumentException [2019-11-26 02:50:10,509 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:50:10,509 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) 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.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) 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:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) 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) [2019-11-26 02:50:10,513 INFO L168 Benchmark]: Toolchain (without parser) took 1705.04 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 946.1 MB in the beginning and 1.0 GB in the end (delta: -99.9 MB). Peak memory consumption was 39.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:50:10,513 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:50:10,514 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.83 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -184.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-26 02:50:10,515 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.18 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:50:10,515 INFO L168 Benchmark]: Boogie Preprocessor took 12.09 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:50:10,516 INFO L168 Benchmark]: RCFGBuilder took 210.76 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: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 11.5 GB. [2019-11-26 02:50:10,516 INFO L168 Benchmark]: TraceAbstraction took 1167.77 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 69.2 MB). Peak memory consumption was 69.2 MB. Max. memory is 11.5 GB. [2019-11-26 02:50:10,520 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 281.83 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -184.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.18 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.09 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 210.76 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: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1167.77 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 69.2 MB). Peak memory consumption was 69.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalArgumentException: Recursive programs are not supported. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalArgumentException: Recursive programs are not supported.: de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-6b5699a [2019-11-26 02:50:12,393 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:50:12,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:50:12,411 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:50:12,411 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:50:12,413 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:50:12,415 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:50:12,423 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:50:12,428 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:50:12,431 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:50:12,432 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:50:12,434 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:50:12,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:50:12,436 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:50:12,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:50:12,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:50:12,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:50:12,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:50:12,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:50:12,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:50:12,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:50:12,454 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:50:12,455 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:50:12,457 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:50:12,461 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:50:12,461 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:50:12,461 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:50:12,463 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:50:12,463 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:50:12,464 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:50:12,464 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:50:12,465 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:50:12,465 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:50:12,466 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:50:12,467 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:50:12,468 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:50:12,468 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:50:12,469 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:50:12,469 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:50:12,470 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:50:12,471 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:50:12,472 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-11-26 02:50:12,504 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:50:12,504 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:50:12,505 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:50:12,505 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:50:12,506 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:50:12,506 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:50:12,506 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:50:12,506 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:50:12,506 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:50:12,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:50:12,508 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:50:12,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:50:12,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:50:12,509 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:50:12,509 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:50:12,509 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:50:12,509 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-26 02:50:12,510 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-26 02:50:12,510 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-26 02:50:12,510 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:50:12,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:50:12,510 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-26 02:50:12,511 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:50:12,511 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:50:12,511 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-26 02:50:12,511 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:50:12,511 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:50:12,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:50:12,512 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:50:12,512 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:50:12,512 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:50:12,512 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-11-26 02:50:12,513 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-26 02:50:12,513 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:50:12,513 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:50:12,513 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/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/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 -> 0c292d0c9d9c055df9398b3303a92d6621b60758 [2019-11-26 02:50:12,831 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:50:12,843 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:50:12,846 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:50:12,847 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:50:12,848 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:50:12,848 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/bin/utaipan/../../sv-benchmarks/c/recursive-simple/id_o10.c [2019-11-26 02:50:12,906 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/bin/utaipan/data/55fbef7ee/4b6f0d9d29ea4a11909edb0e4795af42/FLAG3a01cd607 [2019-11-26 02:50:13,280 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:50:13,281 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/sv-benchmarks/c/recursive-simple/id_o10.c [2019-11-26 02:50:13,286 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/bin/utaipan/data/55fbef7ee/4b6f0d9d29ea4a11909edb0e4795af42/FLAG3a01cd607 [2019-11-26 02:50:13,661 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/bin/utaipan/data/55fbef7ee/4b6f0d9d29ea4a11909edb0e4795af42 [2019-11-26 02:50:13,663 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:50:13,665 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:50:13,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:50:13,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:50:13,673 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:50:13,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:50:13" (1/1) ... [2019-11-26 02:50:13,676 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64ff811d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:13, skipping insertion in model container [2019-11-26 02:50:13,677 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:50:13" (1/1) ... [2019-11-26 02:50:13,685 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:50:13,698 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:50:13,876 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:50:13,883 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:50:13,898 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:50:13,910 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:50:13,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:13 WrapperNode [2019-11-26 02:50:13,911 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:50:13,911 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:50:13,911 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:50:13,912 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:50:13,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:13" (1/1) ... [2019-11-26 02:50:13,925 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:13" (1/1) ... [2019-11-26 02:50:13,941 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:50:13,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:50:13,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:50:13,941 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:50:14,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:13" (1/1) ... [2019-11-26 02:50:14,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:13" (1/1) ... [2019-11-26 02:50:14,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:13" (1/1) ... [2019-11-26 02:50:14,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:13" (1/1) ... [2019-11-26 02:50:14,035 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:13" (1/1) ... [2019-11-26 02:50:14,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:13" (1/1) ... [2019-11-26 02:50:14,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:13" (1/1) ... [2019-11-26 02:50:14,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:50:14,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:50:14,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:50:14,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:50:14,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/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 [2019-11-26 02:50:14,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:50:14,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:50:14,100 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-11-26 02:50:14,102 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-11-26 02:50:14,284 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:50:14,284 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-26 02:50:14,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:50:14 BoogieIcfgContainer [2019-11-26 02:50:14,285 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:50:14,286 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:50:14,286 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:50:14,289 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:50:14,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:50:13" (1/3) ... [2019-11-26 02:50:14,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb097dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:50:14, skipping insertion in model container [2019-11-26 02:50:14,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:13" (2/3) ... [2019-11-26 02:50:14,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb097dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:50:14, skipping insertion in model container [2019-11-26 02:50:14,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:50:14" (3/3) ... [2019-11-26 02:50:14,292 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o10.c [2019-11-26 02:50:14,302 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:50:14,307 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:50:14,318 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:50:14,342 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:50:14,342 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:50:14,342 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:50:14,342 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:50:14,342 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:50:14,343 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:50:14,343 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:50:14,343 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:50:14,361 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-26 02:50:14,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-26 02:50:14,366 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:50:14,367 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:50:14,368 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:50:14,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:50:14,373 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-26 02:50:14,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:50:14,383 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1750284937] [2019-11-26 02:50:14,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/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 [2019-11-26 02:50:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:50:14,490 INFO L255 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-26 02:50:14,505 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:50:14,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:50:14,587 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:50:14,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:50:14,683 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1750284937] [2019-11-26 02:50:14,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:50:14,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-11-26 02:50:14,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66095106] [2019-11-26 02:50:14,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-26 02:50:14,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:50:14,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-26 02:50:14,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-26 02:50:14,705 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 8 states. [2019-11-26 02:50:14,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:50:14,770 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2019-11-26 02:50:14,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:50:14,771 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2019-11-26 02:50:14,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:50:14,779 INFO L225 Difference]: With dead ends: 27 [2019-11-26 02:50:14,780 INFO L226 Difference]: Without dead ends: 14 [2019-11-26 02:50:14,782 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-26 02:50:14,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-26 02:50:14,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-26 02:50:14,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-26 02:50:14,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-26 02:50:14,813 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-26 02:50:14,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:50:14,813 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-26 02:50:14,813 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-26 02:50:14,814 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-26 02:50:14,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-26 02:50:14,815 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:50:14,815 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:50:15,017 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:50:15,017 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:50:15,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:50:15,017 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-26 02:50:15,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:50:15,018 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [389435278] [2019-11-26 02:50:15,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/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 [2019-11-26 02:50:15,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:50:15,055 INFO L255 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:50:15,057 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:50:15,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-26 02:50:15,119 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:50:15,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-26 02:50:15,415 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [389435278] [2019-11-26 02:50:15,415 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302605044] [2019-11-26 02:50:15,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:50:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:50:15,462 INFO L255 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:50:15,463 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:50:15,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-26 02:50:15,472 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:50:15,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-26 02:50:15,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:50:15,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 12 [2019-11-26 02:50:15,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273121238] [2019-11-26 02:50:15,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-26 02:50:15,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:50:15,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-26 02:50:15,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-11-26 02:50:15,587 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 12 states. [2019-11-26 02:50:15,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:50:15,653 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2019-11-26 02:50:15,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-26 02:50:15,654 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-11-26 02:50:15,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:50:15,655 INFO L225 Difference]: With dead ends: 26 [2019-11-26 02:50:15,656 INFO L226 Difference]: Without dead ends: 20 [2019-11-26 02:50:15,657 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-11-26 02:50:15,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-26 02:50:15,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-26 02:50:15,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-26 02:50:15,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-26 02:50:15,666 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2019-11-26 02:50:15,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:50:15,667 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-26 02:50:15,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-26 02:50:15,668 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-26 02:50:15,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-26 02:50:15,670 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:50:15,670 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:50:16,072 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:50:16,080 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:50:16,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:50:16,081 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 2 times [2019-11-26 02:50:16,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:50:16,081 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [981369710] [2019-11-26 02:50:16,081 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:50:16,117 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-26 02:50:16,118 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:50:16,119 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-26 02:50:16,121 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:50:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-26 02:50:16,240 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:50:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-26 02:50:16,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [981369710] [2019-11-26 02:50:16,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422721352] [2019-11-26 02:50:16,729 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:50:16,774 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-26 02:50:16,774 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:50:16,776 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-26 02:50:16,778 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:50:16,786 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-26 02:50:16,790 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:50:17,033 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-26 02:50:17,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:50:17,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11] total 20 [2019-11-26 02:50:17,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513848290] [2019-11-26 02:50:17,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-26 02:50:17,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:50:17,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-26 02:50:17,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2019-11-26 02:50:17,037 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 20 states. [2019-11-26 02:50:17,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:50:17,224 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2019-11-26 02:50:17,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-26 02:50:17,227 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2019-11-26 02:50:17,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:50:17,229 INFO L225 Difference]: With dead ends: 38 [2019-11-26 02:50:17,229 INFO L226 Difference]: Without dead ends: 32 [2019-11-26 02:50:17,230 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2019-11-26 02:50:17,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-26 02:50:17,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-26 02:50:17,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-26 02:50:17,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-26 02:50:17,242 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2019-11-26 02:50:17,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:50:17,242 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-26 02:50:17,242 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-26 02:50:17,242 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-26 02:50:17,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-26 02:50:17,244 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:50:17,244 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:50:17,647 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:50:17,649 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:50:17,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:50:17,649 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 3 times [2019-11-26 02:50:17,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:50:17,650 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [399645410] [2019-11-26 02:50:17,651 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/bin/utaipan/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:50:17,752 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-26 02:50:17,752 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:50:17,754 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-26 02:50:17,757 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:50:18,011 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-26 02:50:18,012 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:50:19,222 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-26 02:50:19,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [399645410] [2019-11-26 02:50:19,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063943113] [2019-11-26 02:50:19,223 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:50:19,274 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-26 02:50:19,274 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:50:19,277 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-26 02:50:19,279 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:50:19,288 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-26 02:50:19,289 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:50:19,949 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-26 02:50:19,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:50:19,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19, 19] total 36 [2019-11-26 02:50:19,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224379867] [2019-11-26 02:50:19,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-26 02:50:19,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:50:19,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-26 02:50:19,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1085, Unknown=0, NotChecked=0, Total=1260 [2019-11-26 02:50:19,952 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 36 states. [2019-11-26 02:50:20,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:50:20,636 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2019-11-26 02:50:20,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-26 02:50:20,636 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 51 [2019-11-26 02:50:20,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:50:20,638 INFO L225 Difference]: With dead ends: 62 [2019-11-26 02:50:20,638 INFO L226 Difference]: Without dead ends: 56 [2019-11-26 02:50:20,640 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=325, Invalid=1931, Unknown=0, NotChecked=0, Total=2256 [2019-11-26 02:50:20,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-26 02:50:20,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-26 02:50:20,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-26 02:50:20,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2019-11-26 02:50:20,652 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 51 [2019-11-26 02:50:20,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:50:20,653 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2019-11-26 02:50:20,653 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-26 02:50:20,653 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2019-11-26 02:50:20,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-26 02:50:20,655 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:50:20,656 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:50:21,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:50:21,059 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:50:21,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:50:21,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 4 times [2019-11-26 02:50:21,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:50:21,060 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [510182035] [2019-11-26 02:50:21,060 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/bin/utaipan/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:50:21,177 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-26 02:50:21,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2019-11-26 02:50:21,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:50:21,280 INFO L174 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2019-11-26 02:50:21,281 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 02:50:21,484 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:50:21,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:50:21 BoogieIcfgContainer [2019-11-26 02:50:21,510 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:50:21,510 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:50:21,511 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:50:21,511 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:50:21,511 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:50:14" (3/4) ... [2019-11-26 02:50:21,513 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-26 02:50:21,559 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_7a14efbb-b7c8-4253-9932-b76e2b318bfc/bin/utaipan/witness.graphml [2019-11-26 02:50:21,560 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:50:21,561 INFO L168 Benchmark]: Toolchain (without parser) took 7896.26 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 266.3 MB). Free memory was 960.4 MB in the beginning and 1.2 GB in the end (delta: -286.9 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:50:21,562 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 987.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:50:21,562 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.88 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:50:21,562 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.69 ms. Allocated memory is still 1.0 GB. Free memory is still 949.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:50:21,563 INFO L168 Benchmark]: Boogie Preprocessor took 99.11 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 194.0 MB). Free memory was 949.7 MB in the beginning and 1.2 GB in the end (delta: -241.5 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-26 02:50:21,563 INFO L168 Benchmark]: RCFGBuilder took 244.82 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 11.5 GB. [2019-11-26 02:50:21,564 INFO L168 Benchmark]: TraceAbstraction took 7223.95 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 72.4 MB). Free memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: -82.5 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:50:21,564 INFO L168 Benchmark]: Witness Printer took 49.23 ms. Allocated memory is still 1.3 GB. Free memory was 1.3 GB in the beginning and 1.2 GB in the end (delta: 7.3 MB). Peak memory consumption was 7.3 MB. Max. memory is 11.5 GB. [2019-11-26 02:50:21,567 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 987.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 241.88 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.7 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 29.69 ms. Allocated memory is still 1.0 GB. Free memory is still 949.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 99.11 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 194.0 MB). Free memory was 949.7 MB in the beginning and 1.2 GB in the end (delta: -241.5 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 244.82 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 7223.95 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 72.4 MB). Free memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: -82.5 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 49.23 ms. Allocated memory is still 1.3 GB. Free memory was 1.3 GB in the beginning and 1.2 GB in the end (delta: 7.3 MB). Peak memory consumption was 7.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] unsigned int input = __VERIFIER_nondet_uint(); [L11] CALL, EXPR id(input) VAL [\old(x)=10] [L5] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L6] CALL, EXPR id(x-1) VAL [\old(x)=9] [L5] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L6] CALL, EXPR id(x-1) VAL [\old(x)=8] [L5] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L6] CALL, EXPR id(x-1) VAL [\old(x)=7] [L5] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L6] CALL, EXPR id(x-1) VAL [\old(x)=6] [L5] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L6] CALL, EXPR id(x-1) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] unsigned int result = id(input); [L12] COND TRUE result == 10 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: UNSAFE, OverallTime: 7.1s, OverallIterations: 5, TraceHistogramMax: 11, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 73 SDtfs, 8 SDslu, 782 SDs, 0 SdLazy, 319 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 392 GetRequests, 305 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.6s InterpolantComputationTime, 264 NumberOfCodeBlocks, 264 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 376 ConstructedInterpolants, 0 QuantifiedInterpolants, 39444 SizeOfPredicates, 7 NumberOfNonLiveVariables, 274 ConjunctsInSsa, 72 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 376/752 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...